Feasibility Report

A feasibility analysis answers the question every owner is really asking: "Should I do this, and if so, what am I actually committing to?" The answer includes not just whether the project is possible, but what it will realistically cost, how long it will take, what the construction sequence looks like, and what the significant risks are. That information, delivered before design begins, is the foundation for every decision that follows.

Most owners arrive at the feasibility question after encountering a specific moment of uncertainty: they've found a hillside lot they want to buy but can't determine what it will actually cost to build on it, they're looking at a construction estimate that came back 40% over their budget, they've lost a home to fire and need to know whether rebuilding makes financial sense, or they own a vacant lot and have no idea where to start. The common thread is that the information available - the listing, the zoning data, the architect's early numbers, the insurance policy - doesn't answer the actual question. The actual question requires site-specific construction analysis: what does the geology require, what do the utilities cost, what does the permitting timeline look like, and what are the real risks.

Last updated: March 2026

What a Feasibility Analysis Provides

A construction-informed feasibility analysis evaluates a specific site and project across nine categories (site conditions, geotechnical, grading, permitting, utilities, environmental compliance, preliminary cost, long-lead items, and risk) and produces a set of deliverables that give the owner the information they need to make an informed decision about whether and how to proceed.

A construction-informed design brief. This is the primary deliverable for an owner preparing to build. It gives the architect the geology, the buildable envelope, the utility constraints, the grading limitations, the regulatory overlays, the construction sequencing requirements, and a preliminary cost framework - all before the first line is drawn. When design proceeds with this information, the architect and construction manager are working from the same set of facts from the start, which produces a design aligned with construction reality rather than one that requires cost reconciliation at the end.

A preliminary project plan. The analysis maps the full arc of the project: what professional services are needed and in what sequence (survey, geotechnical, civil, structural, architect), what the permitting pathway looks like, what the construction phasing requires, what the long-lead items are, and a realistic total timeline from the current starting point to certificate of occupancy. The owner can see the entire picture - not just the next step, but the full sequence of decisions, milestones, and commitments ahead.

A preliminary cost assessment. The analysis produces a Rough Order of Magnitude (ROM) cost estimate broken down by major category: site work, foundation, structural shell, MEP systems, interior finishes, general conditions, and soft costs. Each category includes a range with identified assumptions. The ROM estimate at this stage carries a range of plus or minus 20%, which narrows progressively through design as the CMAR refines the estimate with subcontractor input - to plus or minus 15% at schematic design, plus or minus 10% at design development, and ultimately a Guaranteed Maximum Price (GMP) at construction documents.

A risk register. The analysis identifies the significant risks specific to the project, estimates their probability and cost impact, and recommends mitigation strategies. On a complex hillside site, these typically include geotechnical variability, permitting delays, utility infrastructure constraints, scope growth, and subcontractor pricing volatility. The risk register also informs the contingency recommendation - the percentage of the construction budget held in reserve, calibrated to the specific risk profile of the project.

A clear recommendation. The analysis concludes with one of three outcomes: proceed (the project is feasible as conceived), proceed with conditions (feasible with specific adjustments - the most common recommendation), or do not proceed (the project as conceived is not financially viable, with alternatives identified where possible).

Construction feasibility evaluates the physical, logistical, and financial buildability of a site and a project. It adds the construction dimension to the regulatory and financial analysis that property evaluations typically include - the zoning, the overlays, the market data, the comparable sales. Two adjacent lots can look similar on paper and have construction costs that differ by a factor of three based on differences in bedrock depth, access width, slope stability, and utility capacity. The feasibility analysis is what quantifies those differences. This is the analysis that a Construction Manager at Risk (CMAR) provides. It doesn't replace the work of real estate agents, architects, engineers, or permit consultants. It adds the site-specific cost, schedule, and risk data that informs the owner's decision about whether and how to proceed.

What Drives Cost on Complex Sites

On complex residential sites in Los Angeles, the variables that drive the largest cost impacts are site-specific conditions that can only be evaluated with construction knowledge. Two categories account for the majority of unbudgeted cost on hillside projects: geology and utility infrastructure.

Geology and foundation systems. On hillside new construction, the most common source of significant cost variation is the gap between what the lot surface suggests and what the geology actually requires. Bedrock depth can vary from 10 feet to 40+ feet across a single building envelope. That variation determines whether the foundation is a conventional spread footing system or a deep caisson system, and the cost difference between those two conditions can be $300,000 to $600,000 or more. Only a geotechnical investigation answers that question - and the feasibility analysis is what identifies the need for that investigation, reviews existing geological data, and estimates the likely foundation conditions and their cost implications.

Utility infrastructure. On hillside sites, many existing transformers are sized for the original development and cannot support the electrical load of a new custom home. When LADWP or Southern California Edison determines that a transformer upgrade is required, the timeline is 12 to 18 months from application approval. That timeline runs regardless of the construction schedule. Identifying the requirement during feasibility allows the application to be submitted concurrently with design rather than after permitting. Sewer connections, gas service, water capacity, and fire flow are the other utility variables that feasibility evaluates - and on hillside sites, each can carry cost and schedule implications that aren't apparent from the property listing or the zoning data.

Site work - grading, earth export, shoring, retaining walls, and drainage - is the third major cost category. On challenging hillside sites, site work can represent 25-40% of the total project cost. The Hillside Construction Regulations limit haul trips to 8-10 per day, which means a significant grading export can take months. On renovations, the concealed conditions behind drywall and below slabs - unreinforced foundations, corroded plumbing, inadequate electrical - create a different kind of cost uncertainty that pre-renovation invasive testing can significantly reduce.

These variables are predictable. They're not surprises in the sense that they come from nowhere - they're knowable conditions that feasibility analysis identifies and quantifies before design begins and capital is committed.

The Common Entry Points - Who Needs Feasibility and When

People arrive at the feasibility question from different directions. The buyer evaluating a hillside lot is asking a different question than the homeowner whose house burned down, and both are asking different questions than the owner who already owns a lot and is preparing to build. The analysis adapts to the entry point, but the core methodology is consistent: evaluate the site, estimate the cost, identify the risks, and provide the information the owner needs to make a decision.

Buying a Hillside Lot

On a hillside lot purchase, the construction cost to make the lot buildable is often the largest variable the buyer doesn't know. The purchase price is visible. The construction cost is not - and on hillside sites, it varies dramatically between lots that look similar from the street. A construction-informed feasibility analysis during the due diligence period evaluates the site-specific conditions that drive that cost before the buyer commits.

Before purchasing a hillside lot, evaluate these categories at minimum:

Geotechnical conditions. This is typically the largest cost variable on hillside sites. Check whether existing geotechnical reports are on file for the property or neighboring parcels. Look for geologic hazard designations on ZIMAS: Hillside Area, Landslide Area, Liquefaction Zone, Fault Zone. Walk the lot and look for signs of historic movement - tension cracks, displaced retaining walls, leaning trees, seepage areas. Bedrock depth determines whether the foundation is a conventional spread footing system or a deep caisson system, and the cost difference between those two conditions can be $300,000 or more.

Utility infrastructure. Verify electrical service capacity with LADWP or Southern California Edison depending on the service area. Verify water service and fire flow capacity. Verify sewer connection availability and capacity, including the location of the sewer main and whether an S-permit from the Bureau of Engineering is required for new connections. Check gas service with SoCal Gas. Assess whether the site requires any curb cuts or encroachments in the public right-of-way. Of these, electrical is the most common schedule constraint. If the site requires a new transformer or service upgrade, that timeline runs 12 to 18 months from application approval.

Regulatory overlays. Beyond basic zoning, check for Specific Plan areas, Historic Preservation Overlay Zones (HPOZ), Coastal Zone, Very High Fire Hazard Severity Zone (VHFHSZ), and Hillside Construction Regulation (HCR) applicability. Each of these adds requirements, timeline, and cost. The Coastal Zone alone can add 6-12 months of Coastal Commission review to the permitting timeline.

Grading and earthwork. On hillside lots, the grading scope is a major cost and schedule driver. Preliminary cut/fill analysis, export volume, haul route identification, and HCR hauling limitations all affect cost and schedule significantly. A lot that requires 3,000+ cubic yards of export under HCR hauling restrictions (8-10 trips per day) may need months of grading before foundation work can begin.

Site access and construction logistics. Can construction equipment reach the building pad? Is there space for material staging? Can a concrete truck navigate the access road? On properties where the access constraints are severe, crane-served delivery, material relay systems, or specialized equipment may be required, each of which adds cost and extends the schedule.

ZIMAS is the starting point for any property evaluation in the City of Los Angeles. It's free, it's public, and it shows every applicable overlay, zoning designation, and planning case associated with a specific address or parcel.

Preparing for Construction - You Own the Lot

This is where construction-informed feasibility has its highest impact. The owner has the lot - purchased or inherited, vacant or with an existing structure to be demolished - and is preparing to build. The question is: where do I start? The feasibility analysis answers that question by evaluating the site, mapping the professional services the project requires in the sequence they should be engaged (survey, geotech, civil, structural, architect), establishing a preliminary project plan from the current starting point through certificate of occupancy, and producing a construction-informed design brief that gives the architect a defined set of constraints to design within.

On a complex hillside site, the construction sequence determines the project timeline as much as the design does. A site may require a retaining wall on the downhill side before the building pad can be graded. Utility connections may need to be coordinated with the Bureau of Engineering before foundation work begins. Grading export under HCR regulations may take months and needs to be sequenced before foundation and shoring work can start. The feasibility analysis identifies these sequencing dependencies so they can be planned around rather than discovered during construction.

The analysis also helps the owner understand what they need from the architectural engagement - full design through construction documents, or a specific scope that interfaces with the CMAR's preconstruction work during Phase 1B. Structuring the architect's scope clearly from the start avoids gaps and overlap, and ensures the design team and construction team are working within a coordinated framework.

An important caveat: where a geotechnical report doesn't yet exist, the analysis can evaluate the available geological data, review reports from neighboring properties, assess the geologic hazard designations, and identify the likely foundation conditions - but it can't replace a site-specific soils investigation. What it does is start the arc in the right place: identifying the critical unknowns, commissioning the investigations that resolve them, and sequencing the entire process so each answer arrives when the next decision needs it.

Fire Rebuild - Should I Rebuild or Sell?

After a total loss, the owner faces a decision that involves insurance coverage, construction cost, land value, timeline, personal attachment, and financial capacity. The feasibility analysis provides the financial data that allows the owner to evaluate both paths - rebuild and sell - on their actual numbers rather than assumptions.

The rebuild calculation has four components:

Insurance dwelling coverage vs. actual construction cost. Most homeowner policies in the Palisades fire area carried dwelling coverage between $400 and $650 per square foot. Actual reconstruction costs in 2025-2026 range from $700 to $1,200+ per square foot depending on the complexity of the site, the finish level of the home, and the regulatory requirements triggered by the rebuild. On a typical rebuild, the gap between insurance coverage and actual construction cost can range from several hundred thousand dollars to well over $1M, depending on the home's size and finish level. For a broader discussion of how insurance and construction costs interact on residential projects, see our dedicated guide.

PGRAZ implications. If your property is in a PGRAZ zone - and many properties in the Palisades fire area are - the rebuild triggers mandatory geotechnical review by the Grading Division. This means a new soils investigation, a slope stability analysis, and potentially an upgraded foundation system. The PGRAZ process adds 4 to 6 months to the pre-construction timeline and $150,000 to $250,000 in geotechnical, engineering, and foundation costs that wouldn't apply to a non-PGRAZ rebuild.

ALE (Additional Living Expense) coverage. Most policies provide ALE coverage for 24 months after the date of loss, with some extending to 36 months. The project timeline for a fire rebuild in a PGRAZ zone typically runs 30 to 42 months. If the total timeline exceeds the ALE coverage period, the owner bears the cost of temporary housing during the gap. At $8,000 to $15,000 per month for comparable rental housing on the Westside, a 12-month ALE gap represents $96,000 to $180,000 in out-of-pocket housing costs.

Current land value. In some cases, the current market value of the land (as a vacant lot, post-fire) exceeds what the owner paid for the property. When the land value, combined with the insurance payout, exceeds what the owner would need to spend out of pocket to rebuild, selling the lot and deploying the combined proceeds into a different property may produce a better financial outcome than rebuilding - without construction risk, timeline uncertainty, or ALE pressure. The feasibility analysis quantifies both paths so the owner can compare them clearly.

Major Renovation of an Existing Property

Renovations present a unique feasibility challenge because the existing conditions are partially concealed. You can see the layout, the finishes, the visible structure. You can't see the foundation condition, the framing behind the drywall, the plumbing and electrical in the walls and slab, or the drainage systems below grade. Feasibility for a major renovation is fundamentally about managing the uncertainty of what you'll find when you open the building up.

The critical threshold in Los Angeles is the 50% rule: if the cost of the renovation exceeds 50% of the replacement cost of the existing structure, the project triggers a substantial remodel classification that requires bringing the entire structure up to current code. This includes seismic upgrades, energy code compliance, accessibility requirements, and fire and life safety systems. On a property where the existing structure was built to 1960s or 1970s standards, the cost of code-required upgrades can push a renovation into teardown territory.

Pre-renovation feasibility should include invasive testing at critical locations: core samples of the foundation to assess condition and reinforcement, selective demolition to expose framing connections and identify concealed damage, plumbing scope (camera inspection of drain lines, pressure testing of supply lines), and electrical assessment (panel capacity, conductor condition, grounding). These investigations don't eliminate uncertainty, but they significantly reduce it. Invasive testing typically costs $10,000 to $20,000 depending on scope, and the findings directly inform the renovation budget and scope decisions.

On hillside properties, renovation feasibility must also evaluate the condition of existing retaining walls, the adequacy of the drainage system, and whether the existing foundation meets current seismic and structural requirements.

Already in Design - The Budget Doesn't Work

This is a common entry point. An owner has spent 6 to 18 months in design with an architect. They've invested $150,000 to $300,000 in architectural fees, structural engineering, civil engineering, and other consultants. The design is at Design Development or early Construction Documents. And then they get a cost estimate, either from a general contractor bidding the project or from a cost estimator, and the number is 30% to 50% higher than what they expected.

This typically happens when the design proceeded without construction cost input during the early phases. The foundation system that the structural engineer designed may cost significantly more than what the conceptual budget assumed. The grading and export that the civil engineer specified may add hundreds of thousands that weren't in the cost model. The cost per square foot for the finish level the owner selected may be substantially higher than the initial estimate. These gaps aren't unusual on complex residential projects - they reflect the difficulty of estimating construction cost without site-specific analysis.

At this stage, feasibility analysis takes the form of value engineering and scope realignment. The construction manager evaluates the current design, identifies the major cost drivers, quantifies the gap between the estimate and the budget, and develops options for closing the gap. This might mean redesigning the foundation approach (reducing the number of caissons by adjusting the building footprint), reducing the scope (eliminating the basement level that's driving 40% of the foundation cost), adjusting the finish level (specifying millwork instead of custom, domestic stone instead of imported), or phasing the construction (building the main house now and the guest house later). The design can be revised and the budget realigned, but the cost of revision increases the further the design has progressed. This type of scope - evaluating an existing design against construction reality and developing a path forward - is what BCG structures as a project recovery engagement.

Family Office and Investment Evaluation

For family offices, wealth managers, and private investors evaluating residential development opportunities in Los Angeles, feasibility analysis is a financial underwriting tool. The question isn't "do I like this property?" It's "what's the total project cost, what's the realistic timeline, and what's the risk-adjusted return?"

Total project cost for a development evaluation includes: land acquisition, closing costs, carry costs during entitlement and construction, design and engineering fees (typically 12-15% of construction cost for custom residential), permitting and agency fees, construction cost (the largest variable), construction financing costs, and contingency. On a $15M total development cost with a 30-month timeline and a construction loan at 9%, the financing cost alone is $2.25M. Getting the timeline wrong by 12 months adds $750,000+ in carry costs.

Construction cost is the largest single variable in the development pro forma, and it's the one most often estimated incorrectly. General market assumptions ("hillside construction costs $800-$1,200 per square foot") aren't specific enough to underwrite an investment decision. The actual cost depends on the specific site conditions, access, geology, regulatory requirements, design complexity, and finish level. A feasibility analysis provides a Rough Order of Magnitude (ROM) estimate with identified cost ranges for each major cost category, giving the investment team the data they need to model scenarios and evaluate risk.

What the Analysis Evaluates

A construction-informed feasibility analysis evaluates nine interconnected categories. Each category produces specific findings that feed into the preliminary cost assessment and risk register. The categories are not independent - site conditions affect foundation requirements, which affect grading, which affect schedule, which affect cost. The analysis also evaluates construction sequencing: which operations depend on others, what needs to happen first, and where the critical path runs. The value of the analysis is in understanding these interdependencies before design begins, when the information can actually shape decisions.

Site Conditions and Logistics

The site logistics assessment evaluates how the project will be built - physically, practically, on this specific piece of ground. On hillside sites, the logistics variables often contain the largest cost impacts outside of the foundation itself.

Access routes and constraints. How do you get to the site? How wide is the street? What's the grade of the approach? Are there weight restrictions on the road? Can a standard concrete truck (40 feet long, 80,000 lbs loaded) make the turn from the public road onto the property? Can a drill rig for caisson installation reach the building pad? Can a crane be set up within reach of the building footprint? On a flat lot in Beverly Hills, these questions are straightforward. On a hillside lot in the Bird Streets, on a private road above Sunset Plaza Drive, or on a canyon lot in Mandeville Canyon, the answers define the construction methodology and the cost.

The difference between a site with 30-foot-wide access and one with 12-foot-wide access is not linear. It's exponential. A 30-foot access road can handle two-way construction traffic, a concrete pump truck, and a mobile crane. A 12-foot access road means single-lane traffic, flaggers for every truck delivery, possible crane disassembly and reassembly at the site, and material deliveries in smaller vehicles that require more trips. On narrow hillside access roads, the logistics premium can add 15% to 25% to the construction cost compared to equivalent projects with standard access. For a detailed discussion of hillside construction logistics, see our comprehensive guide.

Staging and material storage. Where do the materials go when they arrive? Where do the workers park? Where does the crane set up? On a flat lot with street frontage, there's usually adequate space. On a hillside lot where the building pad occupies most of the usable area, staging becomes a logistics exercise. You may need to rent adjacent property for staging, establish a remote staging area with shuttle deliveries, or sequence material deliveries just-in-time because there's nowhere to stockpile.

Neighbor exposure. On hillside sites, construction operations often affect adjacent properties. Crane overswing may cross property lines. Excavation and shoring may affect neighboring foundations. Construction traffic may impact shared access roads. Noise and vibration may affect occupied homes. These aren't just courtesy issues - they're legal and contractual issues. Crane overswing requires a license agreement from the neighboring property owner. Shoring that extends beyond the property line requires an encroachment agreement. Construction traffic on shared private roads may require maintenance agreements. The feasibility assessment identifies these exposure areas and flags them as risk items that need to be addressed before construction begins.

Geotechnical and Foundation Assessment

The soils report is the foundational document in a hillside construction project. It determines the foundation system, which is typically the largest single cost variable in the below-grade work. A preliminary geotechnical assessment during feasibility doesn't replace the full soils investigation that will be required for the building permit - but it provides enough information to estimate foundation costs within a meaningful range and identify conditions that could make the project significantly more expensive than expected.

What the soils report tells you. A geotechnical investigation involves drilling exploratory borings, collecting soil samples, performing laboratory analysis, and producing a report that describes the subsurface conditions and provides foundation recommendations. The report tells you: soil type and bearing capacity (what the ground can support), bedrock depth and condition (where you'll find competent bearing for deep foundations), groundwater conditions (whether you'll encounter water during excavation), slope stability (whether the hillside is stable under the proposed loading), and liquefaction potential (relevant in certain areas, particularly in fill soils).

What it tells you about foundation cost. The foundation system recommendation in the soils report directly translates to cost. A conventional spread footing foundation on competent soil at shallow depth might cost $80,000-$150,000 for a moderate-sized home. A caisson foundation with 20+ drilled piers to bedrock at 30-40 feet costs $400,000-$800,000+. The difference between these two conditions is the difference between a $1.2M project and a $2M project - and the lot surface gives you almost no indication of which condition exists below it.

The variable bedrock problem. On many hillside sites in Los Angeles, bedrock depth varies significantly across the building footprint. Three exploratory borings might encounter bedrock at 12, 25, and 38 feet respectively. The foundation design must accommodate the deepest condition, but the actual depth at each caisson location won't be known until the caissons are drilled. This creates a cost uncertainty that persists into construction. A good feasibility assessment acknowledges this uncertainty, provides a cost range rather than a single number, and includes a contingency recommendation specific to the geotechnical risk.

Shoring requirements. If the project involves excavation on a hillside, temporary shoring is required to stabilize the excavation during foundation construction. Shoring systems range from simple soldier piles and lagging ($50-$100 per square foot of retained face) to secant pile walls or soil nail walls ($150-$300+ per square foot) depending on the soil conditions, excavation depth, and proximity of adjacent structures. Shoring is a significant cost item that should be carried in the budget from the earliest estimate.

Dewatering. If the soils investigation reveals groundwater at or above the proposed excavation depth, dewatering may be required during construction. Dewatering involves pumping groundwater to maintain a dry excavation. Depending on the volume and the duration, dewatering can cost $5,000-$15,000 per month for the duration of the below-grade work. It also requires a dewatering permit from the Regional Water Quality Control Board, which adds timeline and compliance cost.

Grading and Earthwork

On hillside sites, grading is not a preliminary step before the "real" construction begins. Grading is construction. It's often the most expensive, most time-consuming, and most regulated element of the site work. A feasibility-stage grading analysis evaluates the volume, cost, and timeline implications before design proceeds.

Preliminary cut/fill analysis. Using the topographic survey and the preliminary building footprint, a feasibility analysis estimates the volume of earth that needs to be cut (removed from the hillside) and the volume that can be used as fill (placed on-site to create level areas). The difference between cut and fill determines the export volume - the earth that must be trucked off-site. On hillside sites in Los Angeles, significant export is the norm. Fill opportunities are limited by compaction requirements, slope stability considerations, and the simple geometry of building on a steep site.

The real cost of moving dirt. Earth export on hillside sites in Los Angeles typically costs $65-$100+ per cubic yard, including excavation and loading, hauling to a disposal site, disposal fees, and traffic control on the haul route. For a project requiring 3,000 cubic yards of export at $85/CY, that's $255,000 in earthwork alone. And that number doesn't include the cost of the grading contractor's equipment mobilization, the temporary erosion control during grading, or the compaction testing and inspection.

BHO grading limitations. The Baseline Hillside Ordinance (BHO) limits the maximum grading quantities on hillside lots in the City of Los Angeles. The formula is based on the lot area and the slope, and it establishes a maximum amount of earth that can be moved. If the project design requires grading that exceeds the BHO limits, a Zoning Administrator adjustment or variance may be required - which adds 6-12 months of discretionary review to the permitting timeline. Knowing whether the design triggers a BHO exception is essential information during feasibility, because it directly affects the project timeline and the risk of denial. For a detailed discussion of grading limits and the BHO on hillside properties, see our dedicated guide.

HCR hauling restrictions. The Hillside Construction Regulations (HCR) govern construction activity on hillside sites, including hauling. The HCR limits the number of haul trips per day (typically 8-10 one-way trips), restricts hauling hours, and requires specific haul routes. These restrictions directly control the grading timeline. If the project requires 3,000 cubic yards of export and each truck carries 10 cubic yards, that's 300 truck trips. At 8 trips per day, that's approximately 38 working days - or about 8 calendar weeks. On projects where the haul route requires traffic control, the actual throughput may be lower. Understanding the hauling timeline during feasibility allows accurate scheduling and cost estimation for the entire project.

Haul route identification. The haul route must be approved by the Department of Building and Safety, and the approval process requires identification of the specific route, traffic management plan, and sometimes a road condition assessment (pre- and post-hauling). Certain streets are restricted for haul traffic. Certain neighborhoods have additional restrictions on construction vehicle traffic. Identifying the approved haul route during feasibility prevents surprises during permitting.

Permitting and Agency Pathway

The permitting analysis during feasibility maps the regulatory path from concept to building permit, identifies the agencies and approvals required, and estimates the timeline. On a straightforward by-right project in the City of Los Angeles, the permitting timeline is 6-12 months. On a project requiring discretionary approvals, environmental review, or multiple agency clearances, the timeline extends to 18-36 months. Knowing which category your project falls into is essential for realistic scheduling and financial planning.

Jurisdiction mapping. Los Angeles is not one jurisdiction - it's a patchwork. The City of Los Angeles (LADBS), the County of Los Angeles (Public Works), and independent cities like Beverly Hills, West Hollywood, Malibu, and Calabasas each have their own building codes, zoning ordinances, permitting processes, and timelines. The feasibility analysis identifies which jurisdiction governs the property and maps the specific permitting requirements for that jurisdiction.

Baseline Hillside Ordinance review. For properties in the City of Los Angeles designated as Hillside Area on ZIMAS, the BHO establishes specific requirements for building height, lot coverage, floor area ratio, grading, retaining walls, and fire access. The feasibility analysis reviews the BHO requirements against the preliminary design concept to identify constraints and confirm that the proposed project complies - or, if it doesn't, to identify the discretionary approvals required to proceed. For a broader discussion of residential zoning in Los Angeles, see our dedicated guide.

Fire zone triggers. Properties in Very High Fire Hazard Severity Zones (VHFHSZ) or Wildland-Urban Interface (WUI) areas trigger additional construction requirements under Chapter 7A of the California Building Code. These requirements affect exterior materials, window and door specifications, ventilation screening, eave construction, and landscape design. The cost premium for Chapter 7A compliance varies by design but typically adds 5-12% to the exterior shell cost. More significantly, fire zone designation may trigger additional fire department review, fuel modification plan requirements, and enhanced fire sprinkler requirements.

Discretionary approval identification. This is the permitting variable with the largest schedule and cost impact. A by-right project follows a predictable timeline. A project requiring a Zone Variance, Zoning Administrator Adjustment, Conditional Use Permit, or CEQA environmental review follows an unpredictable timeline that can add 12-24 months to the process. The feasibility analysis reviews the preliminary design against the applicable codes and identifies any trigger for discretionary review. If discretionary review is required, the analysis assesses the likely timeline, the cost of the application process, and the risk of conditions or denial.

Coastal Zone. For properties in Pacific Palisades (west of Chautauqua Boulevard), Malibu, and other coastal areas, the California Coastal Commission has jurisdiction over development within the Coastal Zone. Coastal Development Permits add a layer of review that focuses on public access, visual resources, habitat protection, and sea-level rise. The Coastal Commission's review timeline is typically 6-12 months after the local jurisdiction has completed its review. This is a serial process: the Coastal Commission review begins after local approval, not concurrent with it. For a Palisades property in the Coastal Zone, this can add a full year to the permitting timeline. For a detailed treatment of coastal construction requirements and permitting pathways, see our dedicated guides.

Utility Assessment

Utility infrastructure is the feasibility category where schedule impacts are most commonly underestimated. The permitting process and foundation costs are generally expected. Utility constraints carry lead times that run independently of the construction schedule - and those lead times cannot be compressed once the project is underway.

Electrical service. The feasibility assessment identifies whether the property is served by LADWP (Los Angeles Department of Water and Power) or Southern California Edison, and evaluates whether the existing service capacity can support the intended use. On hillside sites, many existing transformers are sized for the original development (typically 1950s-1970s homes with modest electrical loads). A new custom home with high-capacity HVAC systems, EV charging, pool equipment, and smart home infrastructure may require a transformer upgrade or a new transformer installation. LADWP's timeline for transformer work is 12 to 18 months from approved application. Edison timelines vary but can be comparable on complex installations. Identifying the transformer requirement during feasibility means the service application can be submitted at the earliest possible date, potentially concurrent with design rather than after permitting. For more on the LADWP clearance process and its impact on project timelines, see our permitting guide.

Water service and fire flow. The water service assessment evaluates two things: domestic service capacity (is there adequate water pressure and volume for the proposed use?) and fire flow (is there adequate water pressure and volume for the fire suppression system?). On hillside sites at high elevations, fire flow can be a significant issue. If the existing water main can't provide the required fire flow, the project may need to install an on-site water storage tank with a fire pump - a $100,000-$200,000 addition that's rarely in anyone's early budget.

Sewer service. For properties connected to the public sewer system, the feasibility assessment verifies that the existing connection has adequate capacity and that the connection point is at the correct elevation relative to the proposed building. The assessment also identifies the location of the sewer main relative to the property and determines whether an S-permit from the Bureau of Engineering is required for new or modified sewer connections. S-permit processing adds timeline and requires coordination with the Bureau of Engineering that should be identified early. For hillside properties not connected to public sewer, the analysis evaluates private sewage disposal (septic) requirements, including percolation testing and the approval process through the County Health Department. Private sewage disposal systems can cost $80,000-$150,000 and require specific lot area for the leach field, which may constrain the building footprint.

Gas service. SoCal Gas serves most residential properties in the greater Los Angeles area. The feasibility assessment verifies whether existing gas service is adequate for the intended use and identifies whether new service lines, meter upgrades, or main extensions are required. On hillside properties with long setbacks from the street, gas line extensions can add cost and require coordination with the utility and the Bureau of Engineering for work in the public right-of-way.

Curb cuts, encroachments, and public right-of-way. On properties that require new driveways, modified access points, or utility connections that cross the public right-of-way, the feasibility assessment identifies whether curb cut permits or encroachment permits from the Bureau of Engineering are required. These permits have their own processing timelines and inspection requirements that run independently of the building permit process. On hillside properties where access improvements may affect the public roadway, these requirements should be identified during feasibility so they can be processed concurrently with design rather than discovered during construction.

Environmental and Compliance Screening

Environmental compliance on residential projects in Los Angeles involves multiple agencies, overlapping jurisdictions, and requirements that can add significant time and cost if they're not identified early.

Protected species. The California gnatcatcher, the California red-legged frog, and other state and federally listed species have been identified in habitat areas throughout the hillside communities of Los Angeles. If a protected species or its habitat is identified on or adjacent to the project site, the project may require biological surveys, nesting season restrictions (which can prevent grading during February-August), habitat mitigation, and agency consultations that add 6-12 months to the timeline.

Protected trees. The City of Los Angeles Protected Tree Ordinance restricts the removal of native oak trees, western sycamores, California bay laurels, and southern California black walnuts. If protected trees are on the site, the project requires a tree report, and any removal requires mitigation (typically 2:1 replacement planting) and a tree removal permit. Heritage trees (defined by species and trunk diameter) may have additional protections that effectively prohibit removal, constraining the building footprint.

Demolition requirements. For renovation or teardown projects involving structures built before 1978, AQMD (South Coast Air Quality Management District) requires asbestos and lead paint surveys before demolition. If asbestos-containing materials or lead paint are identified, they must be abated by licensed contractors under specific protocols before general demolition can proceed. Asbestos abatement on a typical residential structure costs $15,000-$50,000. Lead paint abatement adds $10,000-$30,000. These costs are predictable and should be included in the initial budget. For a detailed discussion of environmental compliance requirements, see our dedicated guide.

Stormwater and LID compliance. The City of Los Angeles Low Impact Development (LID) ordinance requires new construction and major renovations to capture and treat stormwater runoff on-site. The LID requirements vary by project size but typically involve bioretention systems, permeable paving, or capture-and-reuse systems. On hillside sites with limited flat area, achieving LID compliance can be a design constraint that affects landscape design, hardscape materials, and drainage infrastructure. The cost of LID compliance systems ranges from $20,000 to $80,000 depending on the lot size and impervious area.

Preliminary Cost Assessment

The preliminary cost assessment is where all the preceding analysis converges into numbers. This is not a bid. It's not a guaranteed maximum price. It's a Rough Order of Magnitude (ROM) estimate that provides a range-based cost projection with identified assumptions, qualifications, and risk factors. The purpose is to give the owner a realistic cost framework before design begins or progresses further.

ROM pricing methodology. The ROM estimate is developed from current cost data, adjusted for the specific site conditions identified during the feasibility analysis. It breaks the project into major cost categories: site work (grading, export, shoring, retaining walls, utilities), foundation, structural shell (framing, roofing, exterior closure), mechanical/electrical/plumbing systems, interior finishes, and general conditions. Each category is estimated as a range, with the low end reflecting favorable conditions and efficient design, and the high end reflecting challenging conditions or premium specifications.

What drives the gap between $800/SF and $2,400/SF. When people ask about construction cost in Los Angeles, they typically hear a wide range. The reason for the range is that "cost per square foot" is an average that conceals enormous variation in the underlying components. An $800/SF project and a $2,400/SF project are not building the same thing. The major cost drivers include below-grade construction (the foundation, shoring, waterproofing, and structural slab for basement or sub-grade levels can cost $500-$1,000+ per square foot of below-grade area), site work intensity, structural complexity, finish level, systems sophistication, and design complexity. A flat lot with standard access, wood-frame structure, and production-grade finishes produces the low end of the range. A hillside lot with crane-served delivery, steel-frame or concrete structure, custom millwork, imported stone, zoned geothermal HVAC, whole-house automation, and compound-curved geometry produces the high end.

Why "cost per square foot" misleads on hillside sites. On a flat lot, the cost per square foot is a reasonable approximation because the site work is a small percentage of the total project cost. On a hillside site, the site work - grading, shoring, foundation, retaining walls, access - can represent 25-40% of the total project cost. When you calculate cost per square foot for a hillside project, that number includes hundreds of thousands of dollars of below-grade work that has nothing to do with the living area. A 4,000-square-foot house that costs $4M on a flat lot costs $800/SF. The same 4,000-square-foot house on a hillside lot with $1.5M in site work costs $5.5M, or $1,375/SF. The house didn't get more expensive - the dirt underneath it did. The feasibility cost assessment separates the site work from the building cost, giving the owner a clear view of what they're paying for each component.

Long-Lead Identification

Certain items on every project control the schedule not because they're complex to install, but because they require long lead times to procure, fabricate, or approve. Identifying these items during feasibility prevents schedule surprises during construction.

• LADWP or Edison transformer installation: 12-18 months. This is the most common long-lead item on residential projects in Los Angeles. Identifying it during feasibility allows the service application to be submitted as early as possible.
• Geotechnical investigation and Grading Division approval: 8-16+ weeks. The geotechnical investigation, soils report, and Grading Division review are sequential processes that must be completed before the grading permit can be issued. On PGRAZ properties, the review process is extended by the requirement for PGRAZ-specific geotechnical analysis and review.
• Structural steel fabrication: 12-20 weeks from approved shop drawings. If the project design uses structural steel (common on hillside homes with large cantilevers or open-span designs), the fabrication lead time is 12-20 weeks from approved shop drawings. This is a serial process: the structural engineer completes the design, the fabricator develops shop drawings, the engineer reviews and approves the shop drawings, and then fabrication begins.
• Custom windows and doors: 14-24 weeks. High-end window and door systems from European manufacturers (Schuco, Vitrocsa, Sky-Frame, and similar) have lead times of 14-24 weeks from order. American manufacturers like Fleetwood and Western Window Systems run 8-14 weeks. On projects with large glazing systems, window procurement is a critical path item that must be managed from early in the construction schedule.
• Specialty stone: 12-20 weeks. Imported natural stone (marble, limestone, travertine) from Italian, Turkish, and other quarries requires 12-20 weeks from order to job site delivery. Domestic stone is faster (6-10 weeks) but the selection may be more limited. On projects with significant stone work, the stone selection needs to happen during design development - not during construction - or it becomes a schedule constraint.

Risk Assessment

Every project carries risk. The question is not whether risks exist but whether they've been identified, quantified, and assigned a mitigation strategy. The feasibility risk assessment creates the initial Risk Register - a structured document that identifies each significant risk, estimates its probability and cost impact, and recommends a mitigation approach.

How risks are categorized. The Risk Register organizes risks into categories: site/geotechnical, regulatory/permitting, design, cost, schedule, and external. Each risk is assigned a probability rating (low/medium/high), a cost impact range (in dollars), and a schedule impact estimate (in weeks or months). Risks are then ranked by their combined probability and impact to identify the highest-priority items requiring active management.

Common high-impact risks on LA residential projects. On complex residential projects across the Westside, the risks that most frequently materialize include: geotechnical conditions worse than the investigation predicted (probability: medium; impact: $100K-$400K), permitting delays due to agency staffing or incomplete submissions (probability: high; impact: 2-6 months), utility infrastructure inadequacy discovered during construction (probability: medium; impact: $50K-$200K + 6-14 months), scope growth during design (probability: high; impact: 10-25% of construction cost), subcontractor availability and pricing volatility (probability: medium-high; impact: 5-15% of trade costs), and weather-related delays on hillside sites during the rainy season (probability: medium; impact: 4-8 weeks).

Contingency recommendations. The risk assessment informs the contingency recommendation - the percentage of the construction budget held in reserve for unforeseen conditions and scope changes. For flat-lot new construction with standard conditions, a 10% contingency is typically adequate. For hillside new construction, 15-20% is appropriate. For renovation or remediation projects with significant unknowns, 20-25% is warranted. For fire rebuilds on PGRAZ lots with incomplete geotechnical information, 20-25% is the minimum. These percentages are not padding - they're risk-informed reserves based on the specific risk profile of the project.

What the Feasibility Report Looks Like

The feasibility analysis produces a 15-20 page report organized into six sections with supporting appendices. It's not a brochure, and it's not a form letter with blanks filled in. It's a site-specific, project-specific assessment written by a construction manager who has evaluated the conditions, researched the regulatory requirements, developed preliminary cost estimates, and identified the risks.

The report addresses each of the nine categories discussed in detail in Section 4 above: site conditions and logistics, geotechnical and foundation assessment, grading and earthwork, permitting and agency pathway, utility assessment, environmental and compliance screening, preliminary cost assessment, long-lead identification, and risk assessment.

Executive Summary

The report opens with an executive summary that presents the key findings in a format that allows the owner (or their advisor, or their wealth manager) to understand the high-level assessment without reading the full report. The executive summary includes a go/no-go recommendation, a preliminary cost range, an estimated timeline, and a summary of the top risks.

Sample Executive Summary Table

Sample Risk Register (Excerpt)

What You Receive

The deliverables described in Section 1 - the construction-informed design brief, preliminary cost assessment, risk register, project plan, and proceed/conditions/do-not-proceed recommendation - are assembled into a 15-20 page report with appendices including ZIMAS data, relevant code sections, reference photographs, and supporting documentation. The feasibility report is Phase 1A of the BCG pre-construction process. If the findings support proceeding, the next step is Phase 1B: pre-construction services, which includes architect selection support, design-phase cost management, constructability review, and progressive budget development as the design evolves.

Cost and Timing

A comprehensive construction-informed feasibility analysis for a complex residential project in Los Angeles costs between $15,000 and $25,000 depending on the complexity of the site, the scope of the analysis, and whether preliminary geotechnical or other third-party investigations are included. On a project with a total cost of $3M to $10M+, the feasibility analysis represents 0.2% to 0.8% of the total investment. The report is typically delivered within 3 to 4 weeks of engagement, or 6-8 weeks if third-party investigations are included.

The analysis evaluates site-specific cost drivers that affect the construction budget regardless of when they're identified. Earlier identification allows the owner and design team to respond through design optimization, scope adjustment, or informed budget allocation - when the range of options is widest and the cost of adjustment is lowest.

The right time to commission. The earlier the engagement, the more decisions the analysis can inform. The highest-value engagement point is before purchasing a property, where the analysis becomes part of the purchase due diligence and allows the buyer to factor construction costs into the acquisition price. For owners who already have a lot, commissioning before design begins allows the feasibility findings to shape the design brief - providing the architect with the geology, buildable envelope, utility constraints, and cost framework before the first line is drawn. During early design, the analysis serves as a cost and constructability check. For fire rebuilds, the analysis should be commissioned within the first 60-90 days after the loss, before the ALE clock runs and before an architectural engagement begins.

Fee credit. For clients who engage BCG for construction following the feasibility analysis, the feasibility fee is credited toward the construction management fee. The feasibility analysis is designed as the first phase of a continuous engagement, not a standalone transaction.

From Feasibility to Construction

Feasibility is not a standalone service but the first phase of a continuous process that extends through pre-construction and construction. The value of the feasibility analysis is maximized when the same team that conducts the analysis remains involved through design, permitting, and construction - because the knowledge accumulated during feasibility directly informs every subsequent decision.

The Phase 1A to 1B to Phase 2 Framework

BCG's engagement framework progresses through defined phases. Phase 1A is the feasibility analysis described in this guide. Phase 1B is pre-construction services: ongoing cost management during design, constructability review of the evolving plans, subcontractor pre-qualification, schedule development, and progressive budget refinement. Phase 2 is construction, executed under a Guaranteed Maximum Price (GMP) contract that's informed by all the preceding analysis. This phased approach is the CMAR (Construction Manager at Risk) delivery model applied to custom residential construction. For a comparison of how CMAR differs from other delivery methods, including the traditional design-bid-build approach, see our construction contracts guide.

How Feasibility Findings Feed Pre-Construction

The feasibility report creates the baseline that all subsequent analysis builds on. The preliminary cost estimate becomes the benchmark against which design decisions are evaluated ("adding the basement level adds $600K to the foundation - is that within budget?"). The Risk Register evolves into the Constructability Tracking Log, where risks are actively monitored and mitigation strategies are executed. The long-lead item identification triggers procurement planning during design, ensuring that critical-path items are ordered with adequate lead time. The permitting pathway identified during feasibility becomes the permitting strategy that the team executes during design and plan check.

Budget Evolution

The cost estimate evolves as the design progresses and information increases. During feasibility (Phase 1A), the ROM estimate has a range of plus or minus 20%. By the end of schematic design, with constructability input from Phase 1B, the range narrows to plus or minus 15%. By the end of design development, with subcontractor input on major trade packages, the range narrows to plus or minus 10%. At the completion of construction documents, the GMP is established - a contractual commitment by the construction manager to deliver the project at a defined price, with a defined scope, under a defined contract.

This progressive refinement is the core benefit of the CMAR approach. The owner never faces a single moment of "opening the bid envelope" and discovering that the project costs 40% more than expected. Instead, the cost evolves continuously, transparently, with the owner and architect aware of the implications of every design decision as it's made. For a deeper understanding of why CMAR delivers better cost outcomes on complex projects, see our guide on the benefits of early construction manager involvement.

Continuity of Knowledge

The team that conducts the feasibility analysis walks the site, evaluates the geology, assesses the access, identifies the risks. That knowledge lives in the team, in their understanding of the specific conditions, the specific constraints, the specific risk factors. When a different contractor is brought in for construction, that knowledge must be transferred through documents, and documents convey data but not judgment. The CM at Risk model eliminates this knowledge transfer gap by keeping the same team involved from feasibility through construction completion.

Frequently Asked Questions

Do I need a feasibility study if I already have an architect?

Yes - and the architect will likely welcome the information. Architects design to the program (what you want) and the code (what's allowed). A feasibility analysis adds the construction dimension: what it costs to build on this specific site, what the long-lead items are, and what risks exist in the site conditions. This information makes the architect's job easier, not harder, because it provides guardrails that prevent the design from evolving in a direction that the budget can't support. The most effective project teams involve the construction manager and the architect together from the earliest stages.

Does the feasibility study help me figure out what team I need?

Yes. Part of the feasibility analysis is mapping the professional services the project requires and the sequence in which they should be engaged. On a complex hillside project, you'll need a topographic surveyor, a geotechnical engineer, a civil engineer, a structural engineer, and an architect - and the order and timing matter. The feasibility analysis identifies what you need, recommends the sequence, and assists in selecting each consultant. The owner contracts directly with each professional. The CMAR coordinates the process so each scope of work is aligned with the project requirements and the outputs from each consultant feed the next phase.

What's the difference between a feasibility study and a cost estimate?

A cost estimate answers one question: "How much will this cost?" A feasibility analysis answers a broader set of questions: "Should this project proceed? What does it cost? How long will it take? What are the significant risks? What long-lead items need early action? What regulatory constraints will affect the design?" The cost estimate is one component of the feasibility analysis, but the analysis also evaluates site conditions, logistics, permitting pathway, utilities, environmental requirements, and risk - all of which affect the overall project viability, not just the price.

Can a feasibility study tell me if my lot is buildable?

Yes. The feasibility analysis evaluates the physical, regulatory, and financial buildability of the lot. Physical buildability assesses whether the site conditions support construction. Regulatory buildability assesses whether zoning and code requirements allow the intended use. Financial buildability assesses whether the total project cost makes sense relative to the owner's budget and the finished property value. A lot can be physically buildable and financially impractical, or regulatorily buildable and physically very expensive. The feasibility analysis evaluates all three dimensions.

What happens if the feasibility study says I shouldn't build?

The feasibility analysis provides the information earlier in the process, before significant capital is committed to architectural design, engineering, and carrying costs. The "do not proceed" recommendation may be accompanied by conditions - perhaps the project is feasible at a smaller scale, with a different design approach, or with a different budget. The analysis provides the information to evaluate alternatives, not just a binary answer.

Does the feasibility report replace the geotechnical investigation?

No. The feasibility report may include a preliminary geotechnical assessment or a review of available geotechnical information (neighboring soil reports, geological maps, LADBS records), but it does not replace the full soils investigation required for the building permit. The feasibility-stage evaluation provides enough information to estimate foundation costs within a useful range and identify major risk factors. The full investigation is conducted during the pre-construction phase and provides the data required for the foundation design and the grading permit.

How is a construction-informed feasibility study different from what a permit expediter provides?

A permit expediter evaluates the regulatory pathway: zoning, overlays, code requirements, and permitting timeline. This is valuable information, and a good permit expediter is an important member of the project team. But a permit expediter's analysis doesn't include construction cost assessment, site logistics evaluation, geotechnical analysis, utility infrastructure assessment, or risk quantification. These are the elements that determine whether the project is financially viable, not just whether it's regulatorily possible. Construction-informed feasibility includes the regulatory analysis and adds the construction dimension that determines actual cost, timeline, and risk.

Can you do a feasibility study on a fire-damaged property?

Yes, and for fire-damaged properties in PGRAZ zones specifically, the feasibility analysis is essential. It evaluates the rebuild cost vs. insurance coverage, identifies PGRAZ requirements and their cost and timeline implications, assesses utility infrastructure status (fire-damaged utility connections may require full replacement), and provides the financial data needed for the rebuild-vs.-sell decision. On fire-damaged hillside properties, the geotechnical conditions may have changed due to the fire (soil destabilization from heat, loss of root structure, altered drainage patterns), making feasibility analysis more important, not less.

What information do I need to provide for a feasibility study?

At minimum: the property address (so we can pull ZIMAS data and assess site conditions), any existing surveys or reports (topographic survey, geotechnical reports, prior engineering), the preliminary design concept or program (number of bedrooms, approximate square footage, specific requirements like pool, ADU, etc.), and the budget range. If you're evaluating a purchase, the purchase price and intended use. If you've experienced a fire loss, the insurance policy summary showing dwelling coverage, ALE limits, and other relevant coverage. The more information available at the start, the more specific the feasibility findings.

Do I need a feasibility study for a renovation, or just new construction?

Feasibility analysis is valuable for any project with significant cost uncertainty, and renovations often have more uncertainty than new construction. With new construction, you start with a clean site and known conditions. With a renovation, you're working with an existing structure whose concealed conditions (foundation, framing, plumbing, electrical, drainage) won't be fully known until the building is opened up. The feasibility analysis for a renovation includes invasive testing at critical locations to reduce uncertainty, evaluation of code upgrade triggers (the 50% rule, seismic requirements), and a realistic assessment of whether the renovation scope is compatible with the existing structure - or whether the project is actually a teardown candidate.

How We Help

Benson Construction Group provides construction-informed feasibility analysis as Phase 1A of our CMAR engagement. The analysis evaluates your specific site and project across nine categories: site conditions and logistics, geotechnical and foundation assessment, grading and earthwork, permitting and agency pathway, utility assessment, environmental and compliance screening, preliminary cost assessment, long-lead identification, and risk assessment. The deliverable is a 15-20 page report with a preliminary cost estimate, risk register, timeline assessment, and a clear proceed / proceed with conditions / do not proceed recommendation.

The information on this page is provided for educational purposes and reflects the professional experience and perspective of Benson Construction Group. Cost ranges, timelines, and regulatory references reflect current conditions for the greater Los Angeles area and may vary based on project-specific conditions, site complexity, regulatory requirements, and market fluctuations. This content does not constitute professional advice for any specific project. Consult qualified professionals for project-specific guidance.

Benson Construction Group serves Los Angeles County including Pacific Palisades, Bel Air, Beverly Hills, Brentwood, Malibu, Hollywood Hills, Encino, Tarzana, and the greater Westside.