Mixed-Use Feasibility Study for SBA, USDA and Bank Loans

A mixed-use feasibility study is an independent, third-party analysis of whether a building or site that combines two or more revenue-producing uses, most often ground-floor commercial with residential above, can achieve the combined income needed to service a specific loan. It is distinct from an appraisal, which concludes one value for the whole, and from the component studies it draws on, each of which concludes something about one use. The feasibility study concludes whether the capital stack works for the combination.

The combination is the subject. A restaurant below and six apartments above is not a restaurant study with a residential appendix. The two uses share a roof, a structure, a parking supply, a tax bill and a loan, and they compete for the same square footage, which in an SBA file is the first thing the lender measures. The study therefore begins with allocation, proceeds to each component's market on its own evidence, and ends with a consolidated DSCR that states which use is carrying the debt.

The industry's definition is broader than the lender's. The Urban Land Institute's handbook describes mixed-use as three or more significant revenue-producing uses in one project. Lender files are usually two: retail or office below and residential above, or a hotel beside retail in a town-center project. The study uses the lender's definition and states the uses by name.

Mixed-use work divides into three lending situations, and the study is written for the one in front of the lender.

The first is the owner-occupied mixed-use building financed under SBA 7(a) or 504, where an operating business owns the building, occupies at least 51 percent of an existing building or 60 percent of new construction, and leases the rest, including residential units above. Here the study measures square footage before it measures anything else.

The second is the conversion of a commercial building to residential or mixed-use under the state by-right laws enacted between 2022 and 2026, financed by banks, by SBA where an operator occupies the commercial floor, and by the federal historic tax credit where the building qualifies. Here the study tests the building as much as the market. See the adaptive reuse feasibility study page.

The third is the investor-owned mixed-use development, the podium or wrap building with retail at grade and apartments above, or the horizontal town center with retail, residential and a hotel on separate pads, financed by banks, life companies, agency lenders on the residential and CMBS. Here the study tests each component's rent roll, blends the net operating income and reports a DSCR that the lender can decompose.

No federal regulation makes a mixed-use study automatic. Under 13 CFR 120.160(b), SBA may require a feasibility study, and SOP 50 10 8.1, in force for loans numbered on or after October 1, 2026, leaves the decision with the lender or CDC. Lenders request one when the file rests on projections for more than one use at once, which in mixed-use is nearly always: the commercial floor is a new operator, the apartments above do not yet exist, or the building is being converted from a use whose income says nothing about the next one. USDA is explicit: under 7 CFR 5001.306, a Business and Industry guaranteed loan above $1 million to a new business requires an independent feasibility study, and under 5001.105(b)(13) a mixed-use commercial and residential property is eligible only where at least 50 percent of the business's projected revenue comes from business use, a test the study must demonstrate. Conventional lenders apply their own credit policies, which for a project with a residential component and a commercial component underwritten on different assumptions almost always include a third-party review that reconciles the two.

The reader is a credit officer, an SBA district office, a CDC loan committee or a USDA state office, and often an agency lender's underwriter reading only the residential half. The study is written for those readers, not for the borrower, and MMCG accepts no referral fees, contingent fees or financing arrangements that would compromise that position.

Two forces are pushing commercial buildings toward mixed-use at once, and the study is written into both.

The first is retail supply. National retail vacancy stood at 4.3 percent in CoStar's October 2026 national report, and construction starts sit near decade lows because in-place rents do not cover replacement cost. What is being built is pre-leased, grocery-anchored, build-to-suit or mixed-use, where the residential floors carry the land and structure cost that retail rent alone cannot. For a lender this means the ground-floor retail in a new mixed-use building is rarely the reason the project pencils and is often the component most likely to sit vacant longest, and the study treats it that way: projected on its own lease evidence, with its own absorption period, and stress-tested to zero in a case that the residential must survive alone.

The second is zoning. Between 2022 and 2026 a run of state laws removed the local approvals that mixed-use and conversion projects used to need: Texas SB 840, Washington's E2SSB 6026, New Hampshire's HB 631, Virginia's transit parking cap at section 15.2-2209.4, and California's AB 2011, SB 6 and AB 2097 among them. In the cities and counties they cover, the entitlement risk a mixed-use study used to spend a chapter on has become a table of statutory thresholds, and the study's weight moves to the building, the cost and the market. The statutes, their thresholds and their effective dates are set out on the adaptive reuse feasibility study page.

Cost has not moved in the borrower's favor. Rider Levett Bucknall's national construction cost index rose 4.45 percent in the year to July 2026, with the latest quarterly increase the highest in two years, and a mixed-use building carries cost that a single-use building does not: fire separation between occupancies, separate egress, separate mechanical and metering, and, above two stories, an elevator. The study prices those items as their own lines.

In an SBA file the square footage decides eligibility before the market is consulted. Under 13 CFR 120.131(b), a borrower acquiring, renovating or reconstructing an existing building must permanently occupy at least 51 percent of the Rentable Property and may permanently lease up to 49 percent; under 120.131(a), new construction requires 60 percent occupancy on completion with no more than 20 percent permanently leased. The regulation measures occupancy on Rentable Property and is silent on residential use. Whether apartments above an owner-occupied storefront are treated as ordinary leased space within the 49 or 20 percent, or are treated some other way, is a question the lender answers under SOP 50 10 8.1, and the study states the allocation under each reading and identifies which one the lender must adopt.

The arithmetic is unforgiving on the main-street building type: on the one downtown Columbus, Indiana building with a published floor-by-floor split, the storefront alone is 34.4 percent of the building and fails, as the SBA mixed-use feasibility study page shows floor by floor. The study measures the specific building's rentable area from plans or field measurement, states how common areas, stairs and shafts are treated, and shows the percentage before any projection is built.

USDA measures a different thing. Under 7 CFR 5001.105(b)(13) the mixed-use test is projected revenue, not square footage: at least 50 percent of the business's projected revenue must come from business use. Under 5001.118(a), apartments and other housing whose primary purpose is independent housing are ineligible, and under 5001.115(n) an owner's own living quarters must be deducted pro rata by square footage from the loan. A building where the apartments above out-earn the storefront below fails the USDA test even where the operator occupies most of the floor area, and the study runs both tests where both programs are in play.

Conventional lenders impose no occupancy test but impose their own allocation: net operating income by component, a DSCR on each, and a blended DSCR on the whole, so that the underwriter can see whether the retail is carrying the apartments or the apartments are carrying the retail.

The study does not average the components. Each is analyzed on the evidence its own market produces.

The commercial component follows the retail method: a trade area drawn from the road network, the published leakage and surplus analysis at the city, county and metropolitan geographies, a competitive set verified property by property with openings and closings by date, the state DOT traffic count on the segment, and, for an owner-occupied floor, the operator's projection built from the concept's public benchmarks and the local wage base with an imputed market rent carried as a check. For a leased floor the projection is the lease, with the lease type stated and the absorption period for ground-floor space in a new or converted building taken from the submarket's own record rather than from the residential lease-up. See the retail feasibility study page.

The residential component follows the multifamily method: the submarket's rent and vacancy from the American Community Survey, the HUD Fair Market Rent schedule for the county, dated listings with unit size so that rent per square foot can be derived, the municipal housing study where one exists, the pipeline of permitted and under-construction units, and an operating expense build that separates the residential floors' share of tax, insurance, utilities and management from the commercial floor's. In a small downtown, where the published rent evidence is a citywide median and a handful of listings, the study says so and underwrites new upper-floor units nearer the Fair Market Rent than the top of the listing range unless the finish level supports the premium. See the multifamily feasibility study page.

A hotel component, where a town-center project includes one, follows the hotel method with its own segmented demand, verified competitive set, three-year ramp and USALI projection. See the hotel feasibility study page.

What the components share is where mixed-use differs from the sum of its parts, and the study prices each shared item.

Parking is the first. Retail peaks midday and Saturday, residential overnight, a restaurant in the evening, and a shared supply can be smaller than the sum of each use's standalone ratio. The study applies the ULI shared parking method to the specific use mix and hours, states the resulting supply against the zoning requirement or, where a state law has capped or removed the minimum, against the market expectation, and shows the construction cost saved per stall not built.

Vertical and mechanical systems are the second. Fire separation between a commercial occupancy and a residential occupancy, separate means of egress, separate metering, a residential corridor and, in any building of three or more stories, an elevator, are costs that a single-use building does not carry. The study prices them as line items from the contractor's scope and benchmarks them against the public record of comparable projects, which for small historic mixed-use rehabs with four to twelve units above a restaurant or bar ran from about $1.3 million to $5.0 million in total project cost in the most recent round of state historic credit awards in Ohio, with elevator additions among the larger single items.

Operating expense is the third. Property tax falls on one parcel but may be assessed and capped by use: in Indiana, for instance, the residential floors are subject to a 2 percent cap on gross assessed value and the commercial floor to a 3 percent cap, so that at a downtown Columbus rate of 2.5619 per $100 the apartments above are taxed at an effective 2 percent while the storefront below pays the full rate. Insurance, common area utilities and management are allocated by a stated method, and the method is disclosed.

The projection is presented three ways. Each component's net operating income is shown on its own, with its own lease-up or ramp, so that the lender can underwrite the residential at an agency lender's standard and the commercial at a bank's. The consolidated net operating income is then shown with the shared costs allocated, and the DSCR is reported on the consolidated figure against the full debt service at each year. Finally, the DSCR is decomposed: the share of debt service covered by each component in each year, so that a lender can see which use carries the debt. In the Columbus case the brewpub carries about 95 percent of Year 3 debt service and the apartments about 5 percent, and the apartments alone cover 0.06 times in the ground-floor-dark case.

The sensitivity table carries the cases a mixed-use lender runs. The ground-floor-dark case removes the commercial income entirely and reports the DSCR on the residential alone. The residential-vacancy case stresses the apartments in five-point steps. The absorption case delays the commercial lease-up by six and twelve months. The cost case escalates hard cost at the current index. The study concludes feasible, feasible with conditions, or not feasible, and states the condition in the lender's terms, which in mixed-use is most often the pre-lease or owner-occupancy of the commercial floor, or the reserve that carries the project through the commercial absorption period.

For new construction the study presents the project cost by line item, land, hard cost by component, shared systems, site work and parking, soft cost, permit and utility connection fees from the published municipal schedule, financing cost and reserves, benchmarked against the current cost index and local permit evidence and escalated explicitly where the benchmark predates 2026. For an acquisition and rehabilitation the price is tested against closed sales per square foot and the rehabilitation budget against the public record of comparable projects, with the federal historic tax credit, where the building qualifies, carried as a source with its timing and its syndication cost stated.

The capital stack is stated by program. Under SBA 504 the borrower contribution is 10 percent for a standard project, 15 percent where the operating business has operated two years or less or the building is limited or single purpose, and 20 percent where both apply; a main-street building with a restaurant below and apartments above is general-purpose collateral, so an established operator sits at 10 percent and a new entity at 15 percent. Where the project does not meet the 504 job standard of one job per $95,000 of debenture, the public policy goal at 13 CFR 120.862 for revitalizing a business district of a community with a written revitalization or redevelopment plan is the usual substitute, and the study names the plan. Under USDA B&I, equity is 10 percent for an existing business and 20 to 25 percent for a new business or a construction project guaranteed before completion, with the 50 percent business-revenue test met and shown. Conventional lenders size to a blended DSCR and a debt yield, and agency lenders on the residential component size to their own DSCR and loan-to-value, and the study reports each.

Main-street buildings, the two- and three-story commercial blocks with a storefront below and apartments or offices above, are the most common mixed-use subject in SBA lending. Their feasibility turns on the allocation test, on the cost of bringing a century-old structure to current egress and fire-separation code, and on a downtown rent base that is usually a citywide median and a few listings. The Columbus, Indiana case below is this type.

Podium and wrap buildings, four to six residential floors over a concrete podium with retail at grade and structured parking, are investor product financed conventionally and by agency lenders on the residential. Their feasibility turns on the residential submarket, on the cost premium of the podium, and on whether the ground-floor retail is leased before completion or sits dark while the apartments carry it.

Horizontal and town-center projects, retail, residential and often a hotel on separate pads around shared streets and parking, are phased developments whose feasibility turns on the sequencing: which pad is built first, which carries the infrastructure cost, and whether the later phases are conditions of the earlier ones. The study presents the phasing and the DSCR by phase.

Conversions of office, warehouse and commercial buildings to residential or mixed-use are a product type of their own, with the state laws that enable them, the floor-plate and window-line constraints that limit them, and the federal historic tax credit that often finances them.

SBA 7(a) finances the acquisition of a mixed-use building by an operating business with a $5 million cap and a guarantee of up to 85 percent, and SBA 504 finances the acquisition, rehabilitation or construction of an owner-occupied mixed-use building through a fixed-rate debenture of up to $5 million, or $5.5 million for a small manufacturer or a project that cuts energy use by at least 10 percent or generates renewable energy under 13 CFR 120.931, paired with a third-party first mortgage of at least 50 percent of project cost. Both require the borrower to occupy the property under 13 CFR 120.131, with the apartments above counted within the leased share as the lender reads the SOP, and both exclude passive landlords under 120.110(c), with the Eligible Passive Company structure as the route for a holding entity. See the SBA 504 feasibility study and SBA 7(a) feasibility study pages, and compare the programs on the SBA and USDA loan comparison calculator.

USDA Business and Industry guaranteed loans finance mixed-use commercial and residential property in rural areas where at least 50 percent of projected revenue comes from business use, with loan limits to $25 million, an 85 percent guarantee on loans under $5 million and 80 percent above at fiscal 2026 terms until the fiscal 2027 notice is published, a 3 percent upfront fee and a 0.55 percent annual retention fee, and a feasibility study required above $1 million to a new business. Housing whose primary purpose is independent housing is ineligible, which excludes the apartment building with a token storefront. See the USDA Business and Industry feasibility study page.

Where the residential component is financed on its own, two federal programs set limits on the commercial floor. HUD's Section 221(d)(4) finances residential-majority mixed-use only where commercial space is no more than 25 percent of net rentable area and commercial income no more than 15 percent of effective gross income, and the study tests both limits on the HUD multifamily market study basis. In rural areas, USDA's Section 538 guaranteed rental housing program can finance the apartments while B&I finances the commercial floor, each with its own feasibility analysis, as described on the USDA multifamily feasibility study page.

Conventional bank, life company and CMBS lenders underwrite investor mixed-use to a blended DSCR commonly between 1.20 and 1.30 times and a debt yield, with the commercial net operating income frequently haircut or excluded in the sizing, and agency lenders underwrite the residential component on its own. The federal historic rehabilitation tax credit of 20 percent of qualified expenditures applies to income-producing certified historic structures and appears as a source in most main-street and conversion files; state credits vary and have changed recently, and the study confirms the current terms with the state office rather than carrying a figure from a prior year.

MMCG illustrates its mixed-use method through model engagements, each set in a real market with public evidence and written in the register of the study itself. The engagements are illustrative; the markets, buildings, rents, taxes and costs are real, and none of it is drawn from any client file. Each case is published as its own page and follows the order of the study: building, allocation, each component's market, cost, capital stack, consolidated projection, DSCR by year with its decomposition, sensitivities and conclusion.

An MMCG mixed-use feasibility study runs between 100 and 150 pages and includes the allocation analysis under each applicable program test, the market analysis for each component on its own evidence, the shared parking, systems and operating cost allocation, the project cost estimate or acquisition and rehabilitation analysis, the capital stack by program with tax credits as sources, the component and consolidated projections, the DSCR schedule by year with its decomposition by component, the ground-floor-dark and absorption sensitivities, and a signed conclusion. Competitors and comparables are verified against the operators' own published locations, public records and dated listings under MMCG's methodology, and the study states which figures are primary-verified, which are carried from licensed or older sources, and which could not be verified and are carried as stated assumptions.

Standard delivery is 9 to 16 business days from engagement and receipt of the project file, for sites in any state MMCG covers, and rush delivery is available from 5 business days. Fees begin at $4,900 for a single-building SBA 7(a) mixed-use study and range from $7,500 to $15,000 for SBA 504 and two-component studies depending on the number of components, units and scenarios. USDA B&I, conventional and multi-phase mixed-use studies are quoted on scope. Payment is 50 percent at engagement and 50 percent at delivery. MMCG has offered a contractual acceptance commitment on every study since founding: revisions required by the lender or agency are made at no additional cost.