You found the building: a storefront on the ground floor, two apartments above, priced like a house in a neighborhood you want to live in. Then your loan officer starts hedging.

FHA permits up to 49% of a property’s total floor area to be non-residential, making it the only agency program that will finance a building with a leased commercial tenant. Fannie Mae and Freddie Mac both restrict mixed-use to one-unit owner-occupied properties where the borrower personally operates the business — a leased storefront disqualifies the loan outright. Above 49% commercial, or without owner-occupancy, you are in Non-QM or small-balance commercial territory, where the down payment roughly triples.

That single threshold decides how much cash you bring to closing. Understanding it before you write an offer is the difference between a 3.5% down payment and a 25% one.

What Counts as a Mixed-Use Property for Loan Purposes?

mixed-use loans

A mixed-use property combines residential dwelling units with non-residential space in one structure or on one parcel.

The common forms residential buyers encounter:

  • Storefront with apartments above — retail or restaurant at street level, dwelling units on upper floors
  • Live/work units — a single dwelling where part of the space is used for the owner’s business
  • Residential with professional office — a converted front room operating as a law, dental, or accounting practice
  • Mixed-use condominium units — a residential unit inside a building that also contains commercial space

Mixed-use is not the same as multifamily. A four-unit apartment building is residential throughout and underwrites on standard residential guidelines. Mixed-use is also not pure commercial: a building with no dwelling units falls outside residential lending entirely, regardless of program.

The distinction matters because the financing follows the floor area split and the occupancy structure, not what the building looks like or what the listing calls it.

Where Residential Lending Stops with Mixed Use Properties

FHA: the only agency route for a leased storefront

FHA’s position is the most permissive of the three agencies, and it is the one most mixed-use buyers end up using. Under HUD Handbook 4000.1, the non-residential portion of the total floor area may not exceed 49% — meaning at least 51% must be residential.

The operational requirements:

  • One to four units, with the commercial space counting as one unit
  • At least one borrower must occupy a residential unit as a primary residence
  • The loan closes in your personal name, not an LLC or other entity
  • The non-residential use must be legally permitted under local zoning, or legal nonconforming
  • Commercial use must be subordinate to the residential character of the property

Two details catch buyers repeatedly. First, storage areas integral to the commercial space count toward the non-residential total — a basement room leased to a ground-floor restaurant is commercial square footage. Second, the appraiser must produce a building sketch with measured residential and non-residential areas; a two-story building is not assumed to be a 50/50 split, and the actual measurement governs.

The appraisal carries additional obligations. The appraiser must exclude business value, business fixtures, and personal property from the valuation, and must include a definitive statement on whether the commercial use will affect the health and safety of residential occupants. For three- and four-unit properties, FHA’s self-sufficiency test also applies: 75% of the gross potential rent must cover the full mortgage payment.

Mixed-use condominium projects face a tighter standard — commercial space is generally capped at 35% of the project, with FHA able to permit up to 49% where the project’s residential character is maintained.

For the broader program picture, see our guide to FHA loan requirements.

Fannie Mae and Freddie Mac: live/work only

This is where most buyers are surprised, and where a great deal of published advice is simply wrong.

Fannie Mae’s Selling Guide section B2-3-04, Special Property Eligibility Considerations (updated November 4, 2026) requires that a mixed-use property be a one-unit dwelling that the borrower occupies as a principal residence, that the property be primarily residential in nature, and critically, that the borrower be both the owner and the operator of the business. The dwelling may not be modified in any way that adversely affects its marketability as a residential property.

Freddie Mac’s Section 5601.5 imposes materially the same standard: a one-unit primary residence, a legal permissible use under local zoning, and the requirement that where the property has a commercial use, the borrower must be the owner and the operator of the business.

Read those requirements together and the conclusion is unavoidable. A dentist buying a house and running her practice from the converted front room qualifies for conventional financing. A buyer purchasing a building with a leased café downstairs does not — leasing the commercial space to a third-party tenant disqualifies the loan at both GSEs.

Neither GSE publishes a floor-area percentage for this scenario, because the structural requirements screen out the properties a percentage would otherwise govern.

Where the Non-QM and Commercial Line Sits

Once a property fails the agency tests, financing moves to Non-QM and small-balance commercial lenders. The practical boundaries:

Above 50% commercial by area — or by revenue — triggers full commercial underwriting. Some non-bank lenders will treat properties at 51% or more residential under investor-residential frameworks, which is why the floor-area measurement remains decisive even outside agency lending.

Qualification shifts from your income to the property’s. Commercial and Non-QM mixed-use lenders typically require a debt service coverage ratio of 1.20 to 1.25, measured on the building’s net operating income rather than your paystubs. If you are unfamiliar with coverage-ratio underwriting, our DSCR rental loan guide explains the mechanics.

Entity vesting becomes standard. Most lenders in this space prefer or require an LLC, which reverses FHA’s requirement that the loan close in your personal name — a structural fork worth deciding early.

Consumer protections may not apply. Business-purpose credit is excluded from Regulation Z’s ability-to-repay requirements under § 1026.43, and entity-vested business-purpose loans generally fall outside TILA and RESPA. You may receive no Loan Estimate, no Closing Disclosure, and no three-day review period. Prepayment penalties and balloon structures are common.

The appraisal changes form. Residential appraisals use Form 1004 or 1025; commercial mixed-use typically requires a narrative appraisal, which costs more and takes longer.

Portfolio lenders occupy useful middle ground here, holding loans on their own balance sheet rather than selling them, which lets them make exceptions no securitized program allows. Our portfolio loan guide covers that route, and when Non-QM loans are the best choice addresses the broader trade-off.

Case Study: The 220 Square Feet That Cost $134,375

A buyer we will call Maya found a two-story building in Providence listed at $625,000: a 2,300-square-foot café leased to a tenant on the ground floor, two 1,250-square-foot apartments above. Total floor area 4,800 square feet, commercial at 47.9% — comfortably inside FHA’s 49% cap. She planned to occupy one apartment, rent the other, and keep the café tenant in place. At 3.5% down, her cash to close was roughly $21,875.

The appraiser’s sketch undid it. The café’s lease included a 220-square-foot basement storage room holding its refrigeration units. Because HUD requires storage integral to the non-residential portion to be counted as non-residential, the calculation became 2,520 of 5,020 square feet — 50.2% commercial. Over the limit by 1.2 percentage points. FHA ineligible.

Conventional financing was never available to her: both GSEs required that she operate the business herself, and the café was a third-party tenant.

She had two options. Ask the café to surrender the storage room, which the tenant declined because its equipment lived there. Or finance it as a small-balance commercial loan at 25% down — $156,250 instead of $21,875, an additional $134,375 in cash for the identical building.

Nothing about the property changed. What changed was 220 square feet of basement and which column it was counted in.

Frequently Asked Questions

Can I use a conventional loan to buy a building with a rented storefront?

No. Fannie Mae’s Selling Guide section B2-3-04 and Freddie Mac’s Section 5601.5 both require that a mixed-use property be a one-unit primary residence and that the borrower be the owner and operator of the business occupying the commercial space. Leasing that space to a third-party tenant disqualifies the loan at both agencies. Buildings with rented commercial tenants generally require FHA financing, if they meet the floor-area test, or Non-QM and small-balance commercial financing.

Does the garage or basement count as commercial square footage?

It depends on who uses it. HUD requires storage areas integral to the non-residential portion of a property to be included in the non-residential floor-area calculation. A basement room leased to a ground-floor business counts as commercial space; the same room reserved for residential tenants does not. Because this calculation can move a property across the eligibility line, ask the appraiser how each space will be classified before ordering the report rather than after.

Can I buy a mixed-use property as an investment without living there?

Not through any agency program. FHA requires at least one borrower to occupy a residential unit as a primary residence, and both GSEs limit mixed-use to owner-occupied properties. A non-owner-occupied mixed-use purchase moves to Non-QM or commercial financing, where qualification shifts from your personal income to the building’s debt service coverage ratio and where lenders commonly require entity vesting and substantially larger down payments.

What happens if the commercial space is vacant when I buy?

A vacancy affects the two routes differently. FHA’s eligibility turns on the floor-area measurement and your occupancy of a residential unit, so a vacant commercial space does not disqualify the property, though the appraiser still measures and classifies it. Commercial and Non-QM lenders underwrite to the property’s income, so a vacancy weakens the coverage ratio. Some will qualify on an appraiser’s market-rent estimate; others require an executed lease before closing.

References