Mixed-Use Feasibility and Market Studies

The first segment is the apartment building with some commercial space on the ground floor. Agency lenders finance it as multifamily as long as the commercial share stays inside their limits, and while it does, the multifamily hub covers its underwriting; this page picks it up where the commercial income crosses the cap. Fannie Mae's guide, in the version effective August 3, 2026, subtracts 10% of actual commercial income and then reduces net commercial income to 20% of effective gross income where the result is higher ⁶; the version effective August 20, 2026 carries the same rule ²⁵. A retail tenant whose rent pushes past that line still pays it, but none of the excess sizes the loan. The HUD evidence is weaker. HUD's commercial limits for Section 221(d)(4) reach the market through lender term sheets, and an undated sheet from one lender and a March 2026 sheet from another state the income share differently ¹⁰¹¹; the HUD MAP Guide text was not found in the research behind this page. A study for a HUD loan should quote the limit its lender applies and where that limit comes from, rather than treat either sheet as settled.

The second segment is commercial-led: a retail center, an office building or a downtown block where residential or hotel income supports the project without defining it. Banks, CMBS lenders and life companies finance these as retail or office, with no agency cap and with the lender's own coverage and leverage limits ⁷. This is the segment that keeps appearing in rating agency distress reports ²⁴, for reasons the review failures section takes apart, and it is where a study's commercial demand case does most of the work.

The third segment is owner-occupied, and it is the SBA segment: an operating business buys or builds premises and leases the rest, residential space included. SOP 50 10 8.1 with Technical Policy Updates governs applications received by SBA on or after October 1, 2026 ⁵. The residential-space language the research quotes is from the June 2025 edition, SOP 50 10 8, and a study should check it against the 8.1 text its lender applies. That edition let the owner of an existing building zoned for both commercial and residential use occupy the residential space or rent it to a third party, applied the occupancy limits whether the leased space went to a commercial or a residential tenant, barred loan proceeds from improving space leased to others and allowed at most one year to reach the required occupancy ⁹. Residential space for the business itself was allowed where a resident owner or manager was required, within a ceiling of its own ⁹. Apartment buildings are not eligible, and a passive landlord can borrow only as an Eligible Passive Company that leases the whole property to an Operating Company, which must guarantee the loan or co-borrow ⁹²⁶. USDA's Business and Industry guarantee sits beside this segment for rural projects, with a revenue test in place of an occupancy test ⁸.

The test that places a project in a segment is arithmetic on the subject's own rent roll and floor plans, and it has to be run for every year of the projection, not only the stabilized one. A ground-floor lease that expires in year three, apartments that lease up ahead of the storefronts, or an owner that grows into upstairs space can each move the share across a program line. When that happens after closing, the loan was sized under one set of rules and is serviced under circumstances another program would have treated differently. The study is the place to show the share year by year, with the square footage measured on the same basis as the appraisal.

Federal Realty is the clearest public read on a portfolio that mixes commercial space with apartments: 103 properties holding 28.8 million square feet of commercial space with residential units alongside ¹³. At June 30, 2026 the portfolio was 96.1% leased ¹³, and the 124 comparable-space leases it signed in the second quarter, covering 819,273 square feet, averaged $33.68 a square foot against $29.23 under the prior leases ²⁸. Saul Centers, which reports its mixed-use properties separately, had the office space in them 88.2% leased at March 31, 2026 ²⁹, and its residential space was 97.3% leased on a same-property basis at the end of June ³⁰. Listed retail REITs as a group were 97.3% occupied in the second quarter ³¹.

These are institutional portfolios with professional leasing teams, so they set a ceiling for a pro forma rather than a target. Two of their patterns still apply to a small building. Small-shop space, the kind a typical mixed-use storefront offers, was 93.9% leased at Federal Realty on June 30, 2026, against 96.1% for its whole portfolio ¹³. And Saul Centers, which reports each use in its mixed-use properties on its own line, had the office space 88.2% leased ²⁹. A building that leans on upper-floor office income needs an office demand case of its own, because an average taken across uses hides the weakest of them.

The residential component has better expense evidence, but not free or current evidence. NAA's Income/Expense IQ for 2024 drew on 4,666 properties and 1,089,259 units in 109 metros ³²; the category shares NAA has published openly come from its 2019 survey ³³. A 2019 expense mix is a sanity check for a 2026 budget, nothing more; the subject's tax bill, insurance quote and staffing plan replace it.

No public source publishes an operating expense ratio, NOI margin, payroll share, management fee norm or revenue per square foot for small mixed-use buildings. That gap decides the method. The study builds each income line separately: the residential rent roll with vacancy and concessions, the commercial rent roll with expense recoveries, vacancy and credit loss, and parking or other income. It allocates shared costs (roof, structure, insurance, common utilities, management) between the uses by a stated key and shows each use's contribution to net operating income. That separation is what lets a lender apply its program's cap, and see how much of the coverage depends on the use with the weakest market.

For SBA 7(a) and 504 the mixed-use question is a measurement, and the two editions of the SOP frame it differently. SOP 50 10 8.1 sets the shares in the table ⁵; the residential-space language that tells a study how apartments upstairs are treated is the June 2025 text of SOP 50 10 8 ⁹, and the study has to say which reading of that language its lender applies. Either way, the floor plan decides the program: a business that measures below the share on the appraisal's basis has no SBA route, however strong its cash flow. Once the share is met, the 504 contribution turns on the building as much as the business, at 15% for a new business or a limited or special purpose property and 20% when both apply ⁵. The regulation leaves the study itself to SBA: 13 CFR 120.160(b): SBA may require professional appraisals, a survey, or a feasibility study ³⁷.

In a rural town the same building can go to USDA instead, and there the test is revenue, not floor area. Apartments and residential housing are ineligible for Business and Industry guarantees except in mixed-use facilities that pass a business-revenue test, which the research found stated only in a USDA training deck that carries no date ⁸; the study quotes the test as the lender applies it under the rule in force, and shows the business share of projected revenue in every year, since apartments can fill faster than the storefront. The site must lie outside any city or town of more than 50,000 people ¹⁵, and the guarantee and fee terms in the table come from the FY2026 notice ¹⁶. Our USDA Rural Development practice and the note on the five USDA components cover the rest of the program.

Residential-led projects go to the agencies or to banks. Agency execution works while the commercial share sits inside the cap and stops being efficient once it does not: the income above the line still carries operating risk but no longer carries debt. HUD's Mortgagee Letter 2025-02 gives the market-rate Section 221(d)(4) thresholds as 85% of cost and a coverage ratio of 1.176 ³⁵. In the second quarter of 2026 CBRE reported multifamily loan-to-value at 63.3% and commercial loan-to-value at 59.6% ⁷, so a building that tips from residential-led to commercial-led can lose leverage as well as agency terms. In the Federal Reserve's July 2026 survey a moderate net share of banks eased standards on nonfarm nonresidential loans and a modest net share on multifamily loans, while construction and land development standards were basically unchanged ³⁸; a mixed-use construction loan sits in that last category. Our conventional and institutional practice covers agency and bank execution.

Historic tax credits are equity, not debt, and they come with their own timeline: the federal credit applies to certified historic structures rehabilitated for income-producing use, owner-occupied residential use does not qualify, and the State Historic Preservation Office and the National Park Service review the work against the Secretary of the Interior's Standards before certification ³⁶. The main-street section covers how that shapes a study.

The register's figure is a count of employer establishments of landlords. The codes it combines count lessors of residential and nonresidential buildings, not mixed-use projects; they include apartment and office landlords with no commercial-residential mix at all, and they leave out landlords without employees. The 2017 Economic Census, as relayed by a code-lookup site, put revenue for lessors of nonresidential buildings alone at $122.8 billion and payroll at $11.1 billion ⁴²; it covers one of the two codes, from an older census, and should not be set against the register figure as if the two measured the same population.

No published source counts U.S. mixed-use properties, splits their owners between occupiers and investors, or ranks mixed-use operators by size. Federal Realty and Saul Centers report mixed-use portfolios and appear in the operating section above ¹³²⁹. Consolidation in 2025 and 2026 has run through REIT deals in retail and apartments rather than through mixed-use specialists: in September 2026 an acquisition of a REIT with 115 open-air centers was reported at $2.34 billion ³⁹, and in April a shopping-center REIT announced a take-private ⁴⁰. For a small mixed-use building none of these owners is the competitor. The competitor is the next block of storefronts and the newest apartment lease-up within the trade area, and the study should name both.

The Census Bureau tells permit respondents to include all new housing units in mixed-use buildings in their ordinary housing counts ⁴⁵, so the federal permit series cannot separate mixed-use from any other housing, and no trade or licensing source fills the gap. The register's state figures above are the only complete state series, and they are a proxy: the codes count lessors of residential and nonresidential buildings, not mixed-use projects. What the state figures measure is how many employer establishments of landlords each state has. They are not a measure of mixed-use supply and they cannot show saturation.

The pipeline evidence that does exist is for the residential half. The Census Bureau counted 484,000 multifamily units completed in 2025 ⁴⁴. RealPage, which tracks market-rate rentals only, recorded 409,500 deliveries in 2025 against a peak of 586,100 in the year ending in the fourth quarter of 2024 ¹, with 519,000 units under construction and 324,000 of them due to finish within 12 months as of the third quarter of 2025 ²². National counts like these set the background; a project delivering in 2027 or 2028 should name the buildings due in its own trade area in its own delivery year.

Saturation shows up at the component level, use by use and metro by metro. RealPage reported apartment rents down nearly 8% in Denver and Austin and just over 5% in Phoenix in the year to the third quarter of 2025 ²², while Cushman and Wakefield's first-quarter 2026 retail report put vacancy at 3.0% in Miami, 3.5% in Nashville and 3.9% in Charleston ²³. The study should present supply for each use separately, name the projects under construction within the subject's trade area for each, and link the residential and retail analysis to the single-use evidence on the multifamily and retail hubs rather than borrowing a national mixed-use story that does not exist.

The adaptive-reuse apartment pipeline held 193,900 units at the start of 2026, with office the largest former use in it ³. Our research note on office repurposing carries the national office-to-apartment count, the metros with the largest pipelines, the incentive programs and the geometry and basis tests that decide whether a conversion pencils. The same RentCafe count gives figures for metros the note names without one, such as Los Angeles at 4,340 units, and for others it does not cover: Denver at 2,991, Philadelphia at 2,697, Atlanta at 2,642 and Cincinnati at 1,770 ⁴⁶. This section covers what a lender's study adds to the note.

Conversions are financed with bridge or private construction debt, not agency execution, until the building is converted and leased. The 2026 record shows where that debt gets stuck. In Boston, Bisnow reported in August 2026 that financing problems had left most proposed conversions stalled, and one source it quoted put 75% of a conversion's cost in doubt until the permit is issued ⁴⁷. In Washington a planned conversion of an office building to about 500 apartments, approved by the zoning commission in March 2026, had a lender pursuing foreclosure by late September; the report gives no cause ⁴⁸. In Phoenix a conversion of a former bank tower stalled almost finished and went into foreclosure before its lender bought it back at auction in 2023, and another developer completed it, opening in October 2026 ⁴⁹. None of the three reports blames a shortage of renters: Boston's turns on financing and cost certainty, Washington's on a foreclosure without a stated cause, and Phoenix's on a stall that took years and a new developer to finish.

That shifts the weight of the study. The building comes first. Developers prefer older buildings with narrower floor plates because more of each floor gets daylight ⁵⁰, and plumbing risers, structure and facade condition decide cost. The research found no published lender rule requiring a structural engineering report for conversions, but a lender that does not hold one before closing is pricing a structure it has not seen. Cost evidence is deal-level only: no source publishes a conversion cost per unit, so the study rests on the subject's own engineering and bids, with a contingency set after the structural survey.

The market case is the familiar apartment case with two adjustments. The converted units lease against new construction and the concessions it offers ¹², and the carry during conversion has to be funded until the takeout lender's coverage test is met. Where the conversion keeps retail on the ground floor, the stabilized building becomes a residential-led mixed-use building, and the agency commercial cap applies at takeout ⁶. A study should show the takeout coverage with the capped commercial income, not the full rent roll, and our note on coverage-constrained takeout covers that test.

The International Building Code treats a live/work unit as a dwelling with a workspace inside it, classified in Group R-2. The unit may not exceed 3,000 square feet, the nonresidential area may not exceed half of it and must be on the first or main floor, no more than five nonresidential workers may be present, and storage may take no more than a tenth of the nonresidential area ⁵⁴. Jurisdictions amend these limits: Victoria, Texas sets its own size ceiling and residential-area limit and moves the unit into Group R-3 ⁵⁵. A study should quote the local code as adopted, not the model code, because the classification drives fire separation, accessibility and cost.

The research found no agency or SBA guidance specific to live/work units and no lending benchmark for them. The nearest treatment is residential: the units are leased as dwellings, so an agency lender would read their rent as residential income inside the building's commercial cap, but that is an assumption the study has to confirm with the lender, not a published rule. For an SBA borrower the question is harder. A business operating from one live/work unit in a larger building may not occupy enough of the property to qualify, and the June 2025 SOP allowed residential space for a business only where a resident owner or manager was required ⁹.

Demand evidence is equally thin. No source counts live/work units or measures their absorption separately from apartments. The study therefore runs the residential case for the units as apartments, tests whether the trade area supports the premium a workspace commands, and presents the work space as optional value rather than as a separate commercial income line. The mixed occupancy itself has to be resolved in design: the code allows accessory, nonseparated, separated and live/work approaches, alone or combined ⁵⁶, and the choice changes cost.

ICSC publishes no town-center class. Its nearest formats are the lifestyle center and the community center, defined by leasable area and site acreage, and for the lifestyle center a trade-area radius, in a classification standard that carries no date ⁵⁸. A town center adds residential, office or hotel uses to that format, sometimes on separate parcels, sometimes in vertical buildings around a retail core.

Banks, CMBS lenders and life companies underwrite town centers as retail or horizontal mixed-use ¹⁸, and their record sits in the CMBS mixed-use series that the review failures below take apart, a series that moves with a small number of large urban loans. The Kansas City shopping district described in the valuation section, sold in 2024 and since proposed for redevelopment ⁴⁰, is a district-scale example.

A study for a town center has to work at district scale. The retail trade area is measured in miles, not blocks, and anchor and junior anchor commitments decide the in-line leasing. Residential phases can lease ahead of the retail core and change the income mix the lender sees in each year, so the study should present the mix by phase. Where parcels are financed separately, each loan should be tested on its own parcel's income, with reciprocal easement and shared parking agreements in the file. The retail hub covers shopping-center demand and tenancy in depth.

• Floor-area schedule by use and an income-share or occupancy schedule for every projection year, measured on the appraisal's basis; for SBA, an appraisal stating the owner-occupancy percentage and an application whose square footage matches it, as Pursuit Lending, a CDC, advises ⁴¹.
• For SBA real estate held by a separate entity, the lease from the Eligible Passive Company to the Operating Company and the guaranties the regulation requires ²⁶.
• All material commercial leases with the lender's review, tenant estoppel certificates and subordination, non-disturbance and attornment agreements ⁵⁷.
• Shared-use agreements where uses share facilities, and condominium documents where the building is divided into a mixed-use regime ⁵⁷.
• A market study and an appraisal ⁵⁷, with the market study running a separate demand case for each significant use, as this page recommends.
• A property condition assessment, a Phase I environmental site assessment with an environmental indemnity, a seismic risk assessment where the hazard applies, and flood insurance evidence ⁵⁷.
• Zoning evidence, including legal non-conforming status where relevant, a survey, title and certificates of occupancy ⁵⁷, and the building's code classification for its mixed occupancies ⁵⁶.
• The property management agreement, and a ground lease estoppel where the building sits on leased land ⁵⁷.
• A contractor's bid dated after mid-2026, broken out by use and by shared structure, with tenant improvement and leasing budgets for the commercial space (this page recommends the date because of the cost movement above).
• For a conversion, a structural engineering report and a contingency set after it; no published lender rule requires the report, so its absence should be a stated condition rather than an oversight.
• For a historic rehabilitation, the National Park Service Part 1, Part 2 and, at completion, Part 3 certifications, with the credit investor's commitment ⁵².
• For a hotel component, the franchise and management agreements and a competitive-set report; the research found no agency rule requiring them for mixed-use, so they are lender requests.