The quick read: Yes, if your business is the main occupant. SBA 7(a) and 504 loans can buy a building with a storefront and apartments when the business permanently occupies and uses at least 51 percent of the Rentable Property in an existing building, or 60 percent of new construction, under 13 CFR 120.131. SBA's SOP 50 10 8.1 counts apartments rented to tenants as leased space, so the apartment floors usually decide whether your business clears the test.
As of: October 6, 2026 (13 CFR Part 120, January 1, 2025 edition, and SBA program pages read this date)
Occupancy, existing building: the borrower permanently occupies and uses no less than 51% of the Rentable Property and may permanently lease up to 49%
Occupancy, new construction: no less than 60%, with up to 20% permanently leased to tenants
Rentable Property (13 CFR 120.10): the total square footage of all buildings or facilities used for business operations
Residential space (SOP 50 10 8.1): apartments rented to tenants count as leased Rentable Property; an owner's own apartment counts as business space only if the business requires a resident owner or manager
504 minimum contribution: 10%, or 15% for a business operating two years or less or a limited or single purpose building, and 20% when both apply
Loan limits: 7(a) maximum of $5 million; 504 outstanding balance of $5,000,000 per borrower and affiliates for most projects under 13 CFR 120.931, while SBA's 504 page states a $5.5 million maximum
Current SBA policy document: SOP 50 10 8.1 with Technical Updates, effective October 1, 2026
Can you use an SBA loan to buy a mixed-use building?
Yes, you can use an SBA 7(a) or 504 loan to buy a mixed-use building when your operating business is the building's principal occupant, because SBA finances owner-occupied business property and rules out passive landlords. A shop owner buying the building with apartments above qualifies or fails on the occupancy test, not on the building's label.
The line SBA draws is between using a building and collecting rent from it. 13 CFR 120.110(c) lists as ineligible "passive businesses owned by developers and landlords that do not actively use or occupy the assets acquired or improved with the loan proceeds," with an exception for Eligible Passive Companies that lease to an operating business. SBA's 504 page separately says 504 proceeds cannot be used for speculation or investment in rental real estate.
So a bakery owner buying the three-story building her bakery already rents, with two floors of apartments above, is asking an SBA question. A buyer who wants the building mainly for the apartment income is asking an investor question, and that is a different file. The mixed-use financing overview covers the investor side; this guide is only the owner-user SBA path.
How does SBA measure occupancy in a building with apartments?
SBA measures occupancy against Rentable Property, which 13 CFR 120.10 defines as the total square footage of all buildings or facilities used for business operations, and an existing building passes when the business permanently occupies and uses at least 51 percent of it. The test is square footage, not the rent each space produces.
The regulation does not, on its face, spell out how a residential apartment upstairs is treated, but SBA's SOP 50 10 8.1, effective October 1, 2026, does. Its occupancy rules (Section A, Chapter 3, Paragraph C) exclude stairways, elevators and mechanical areas from Rentable Property and include common areas. In an existing building zoned for both commercial and residential use, the owner may occupy or rent out the residential space subject to the occupancy test, and the leasing limits apply whether a tenant is commercial or residential. Apartments rented to tenants count as leased space.
Hypothetical example: an existing three-story building of 7,200 square feet, with a 2,400-square-foot bakery on the ground floor and 4,800 square feet of apartments on the two floors above.
If the bakery uses only the ground floor: it occupies 33 percent, which fails the 51 percent test.
If the bakery also takes the second floor for production and storage, where zoning allows: it occupies 4,800 square feet, 67 percent, and the 2,400 square feet of apartments left on the top floor sits inside the 49 percent that may be leased.
Same building, opposite answers, decided by how much of it the business uses. That is why the floor plan, not the purchase price, decides whether the file is an SBA file at all. A second storefront on the ground floor changes the math again, because every tenant storefront and apartment counts toward the 49 percent. The bank or Certified Development Company (CDC) measures the floor plan, so get its square footage figures in writing before the purchase contract is signed.
Can you lease the other storefronts and apartments to tenants?
Yes, within limits: in an existing building the borrower may permanently lease up to 49 percent of the Rentable Property to tenants if it permanently occupies and uses at least 51 percent, under 13 CFR 120.131(b), so rent from a second storefront or upstairs units can help carry the loan without disqualifying it.
The regulation caps leased space by its share of square footage, not the rent it produces. A high-rent corner storefront leased to a tenant does not fail the test by itself if the square footage works.
Two situations have specific SOP rules worth raising with the lender early:
A live-in owner: SOP 50 10 8.1 treats an apartment the owner lives in as occupied by the business only if the nature of the business requires a resident owner or manager, the residential space is appropriate to the business's needs and no more than 49 percent of the property, and zoning allows it. A shop owner who simply lives upstairs should not count that apartment toward the 51 percent.
A tenant you plan to remove: occupancy is tested on what the business will permanently occupy and use. SOP 50 10 8.1 allows time after closing to meet the test, such as when a pre-existing lease has a few more months to run, but in no case more than 1 year, and on a 504 loan the CDC needs SBA's written approval in advance. Plan around any lease that runs longer.
What changes if you are building a new mixed-use building?
New construction carries a stricter test: under 13 CFR 120.131(a) the borrower must permanently occupy and use at least 60 percent of the Rentable Property, may permanently lease no more than 20 percent, and must plan to occupy some remaining space within three years and all of it within ten.
Read plainly, any space beyond the 20 percent you permanently lease has to be space your business plans to grow into; SOP 50 10 8.1 lets up to another 20 percent be leased temporarily in the meantime. A new building with a shop on the ground floor and rental apartments above has to fit inside that rule, and apartments leased to residential tenants count against the leasing limits the same way a commercial lease does.
If the apartments are the point of the project, the question is construction financing for a mixed-use development rather than an SBA owner-occupancy loan, and the lender types and underwriting are different.
How much do you need to put down on an SBA mixed-use purchase?
Under 13 CFR 120.910 a 504 borrower contributes at least 10 percent of project cost, rising to 15 percent for a business operating two years or less or a limited or single purpose building and 20 percent when both apply, while a 7(a) lender sets its own equity requirement within SBA rules.
The rest of a 504 stack comes from 13 CFR 120.920: one or more Third Party Loans, usually a bank first mortgage, totaling at least as much as the 504 loan, and at least 50 percent of total project cost when the business has operated two years or less or the project is a limited or single purpose asset.
Hypothetical example: a $1,500,000 purchase of a mixed-use building by a business that has operated for six years. The bank first mortgage is $750,000, the 504 loan is $600,000 and the business contributes $150,000.
The ceilings: SBA's 7(a) page states a maximum 7(a) loan of $5 million, and 13 CFR 120.212 allows a 7(a) loan financing real estate a maximum of 25 years, including extensions. For 504, 13 CFR 120.931 sets an outstanding balance of $5,000,000 for each borrower and its affiliates for most projects and $5,500,000 for each project for small manufacturers and certain energy projects; SBA's 504 page states a $5.5 million maximum. Plan around the regulation's general figure unless your project fits one of those categories, and confirm with the CDC.
SBA 504, SBA 7(a), conventional or DSCR: which fits a storefront-plus-apartments building?
SBA 504 and 7(a) fit an owner whose business occupies the required share of the building, a conventional bank loan fits an owner who misses the test or wants fewer program conditions, and a DSCR investor loan fits a buyer who rents out the whole building and qualifies on its rent.
Rate levels move daily, so the table compares how each route is set, not today's quotes.
| Route for a storefront-plus-apartments building | Occupancy test | Down payment or contribution | Rate basis | Best when |
|---|---|---|---|---|
| SBA 504 (bank first mortgage plus CDC loan) | 51% of Rentable Property in an existing building; 60% in new construction | At least 10%; 15% for a business two years old or less or a limited or single purpose building; 20% if both | 504 portion pegged to an increment above the 10-year Treasury; bank portion priced by the bank | Your business is the main occupant and you want long fixed-rate debt on the real estate |
| SBA 7(a) | Same 51% and 60% test under 13 CFR 120.131 | Set by the lender within SBA rules | Lender's rate, subject to SBA maximums | The deal also needs working capital, equipment or a business purchase, within the $5 million maximum |
| Conventional bank loan | No SBA test; bank policy | Bank policy; the supervisory loan-to-value limit for improved property is 85%, which a bank may exceed on a limited share of exception loans | Bank's own pricing | You miss the occupancy test, or speed and fewer program conditions matter more than leverage |
| DSCR investor loan | None; qualifies on the property's rental income | Lender policy | Lender's own pricing | You are an investor renting every unit and storefront |
Dated: SBA figures read from 13 CFR 120.131, 120.910 and 120.931 (January 1, 2025 edition), SOP 50 10 8.1 and SBA's 504 and 7(a) pages on October 6, 2026; the bank limit read from the appendix to 12 CFR part 34, subpart D, the same day. Conventional and DSCR rows describe the mechanism, not a quoted term.
The mechanism behind the table is who carries the loan. On an SBA loan the operating business's cash flow is the primary repayment source and the tenants' rent supports it. On a DSCR loan the building's rent is the whole case, so the apartments and other storefronts have to cover the debt on their own. Compare the programs on the SBA loans page and the property side on the mixed-use loans page.
Buying the building your shop is in, apartments included? What a lender will check
A lender will check the floor plan and rentable square footage, which storefronts and apartments are leased and on what terms, your business's financial statements and tax returns, the purchase contract, and whether you hold title directly or through a real-estate company leasing to the business, before it sizes an SBA or conventional loan.
If a separate real-estate company will own the building, 13 CFR 120.111 sets the lease terms: it must be in writing and subordinate to SBA's lien, run at least as long as the loan, and charge no more than the loan payment plus the holding company's direct expenses, and each holder of at least 20 percent of either company must guarantee the loan. Bring the current rent roll, copies of every residential and commercial lease, and personal financial statements for each 20 percent owner.
YieldStack is a commercial mortgage brokerage, not a lender. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed. Send the building and your occupancy plan and the deal team will route it to the SBA, bank and investor lender types whose current programs fit the floor plan.
The bottom line
Yes, an SBA 7(a) or 504 loan can buy a mixed-use building when your business permanently occupies at least 51 percent of the Rentable Property in an existing building, or 60 percent of new construction. The apartments are the swing factor: SBA counts apartments rented to tenants as leased space, so measure the whole building, apartments included, and get the lender's written square footage figures before you sign. If your business cannot clear the test, a conventional or DSCR loan is the route.