Commercial Loans in Miami, FL: Zoning, SBA and Local Costs

Short answer

A commercial loan in Miami is sized on the property's income and value, but in the City of Miami the lender will also check that your use is allowed under the Miami 21 zoning code, that the building's recertification is current, and what taxes will look like after the sale. Business owners who occupy at least 51% of an existing building may qualify for SBA 504 financing up to $5.5 million, or SBA 7(a) up to $5 million, as of October 2026. Investors usually use conventional commercial, DSCR or bridge loans, all business-purpose credit.

Miami 21: zoning decides what the building can earn

How commercial underwriting works (NOI, DSCR, LTV) and Florida's statewide closing taxes are in our Florida commercial loan guide. In the City of Miami, the first question is zoning, because the use drives the income the lender underwrites.

The city's zoning code is Miami 21, a form-based code. Instead of classic commercial or residential districts, most of the city is mapped in transect zones, T3 through T6, from sub-urban neighborhoods to the urban core. Each zone regulates which uses are allowed and what share of the building each use may occupy. Most zones also carry a suffix: R (Restricted), L (Limited) or O (Open). As of October 2026, examples from the city's Miami 21 reference sheets:

• T5 (Urban Center): 65 dwelling units per acre in T5-R, T5-L and T5-O.
• T6-8 (Urban Core): up to 8 stories. T6 density is 150 units per acre in R and L, and 150 to 1,000 in O, subject to the code's diagrams.
• Commercial limits in T6: in Restricted, each commercial establishment is capped at 4,000 sq ft and limited to the first two stories, and office to four stories. Limited and Open allow up to 55,000 sq ft per establishment.
• Parking in T6: 3 spaces per 1,000 sq ft of office or commercial, and 1.5 per apartment plus visitor spaces. Reductions by waiver or exception may apply near transit (TOD and Transit Corridor areas).

These are reference sheets; the official Miami 21 Code, as amended, controls. Look up the property in the city's zoning GIS by address or folio (City of Miami folios start with 01), and check Article 4, Table 3 for allowed uses.

Mixed-use and change of use: the Certificate of Use

Mixed-use buildings, with a storefront below and apartments or offices above, are common on Miami's commercial corridors and fit the transect model. Lenders look at how much of the income is commercial versus residential, how long the leases run, and whether every use is legal.

• Certificate of Use. Under Miami 21 Article 7, a Certificate of Use is required before a structure is used, or before it is changed, converted, enlarged or moved. A new tenant with a different use, or a conversion from office to residential, needs a new one. Applications go through the city's Miami Biz portal.
• Parking for a change of use in an existing building follows Article 7, Section 7.2.8. A use that needs more parking than the site has can stall a lease-up plan.
• Waivers are for minor deviations and practical difficulties, not financial hardship, per the city's zoning FAQs. Do not count on one to make the numbers work.
• Lodging is a special case. A rental of less than 30 days is a lodging use, allowed only in certain zones and only with a Building Certificate. If more than 25% of a building's units are transient lodging, the whole building must meet R-1 standards.

Five or more apartments are a commercial loan even with no storefront. See multifamily loans.

SBA 504 and 7(a) for Miami business owners

If your business will occupy the building, SBA loans are worth comparing. As of October 2026, per the SBA:

• SBA 7(a): up to $5 million. Uses include acquiring, refinancing or improving real estate and buildings, along with other business needs.
• SBA 504: up to $5.5 million (one SBA page headline still says $5 million; confirm with the lender). A Certified Development Company (CDC) originates the loan alongside a senior lender. Terms of 10, 20 and 25 years with a fixed rate tied to the 10-year Treasury. Uses include buying, building or renovating buildings and land. Speculation and investment in rental real estate are not eligible.
• Occupancy (13 CFR 120.131): in an existing building, the business must occupy at least 51% and may lease out up to 49%. In new construction, it must occupy at least 60%, may permanently lease up to 20%, and must plan to occupy the rest within 10 years.

That 51% rule matters in Miami's mixed-use stock: a business that buys a two-story building and uses the ground floor and half the second floor may fit, while one that uses only the storefront of a three-story building likely does not. If the building is mostly for rent, look at a conventional commercial or DSCR loan instead.

Property taxes: millage and the 10% non-homestead cap

Taxes are usually the biggest operating expense after debt, and they sit inside the NOI the lender uses. As of October 2026:

• Millage. The 2026 adopted total for a City of Miami address is 19.9544 mills, about 2.0% of taxable value, per the Miami-Dade Property Appraiser. Unincorporated Miami-Dade is 16.8983.
• The 10% cap. Non-homestead property, including commercial, gets a cap of 10% a year on assessment increases, excluding School Board taxes. It applies automatically; there is no application.
• When the cap resets. For commercial and other non-residential property, the cap resets after a change of ownership or control, and after a qualifying improvement that raises just value by at least 25%. Residential property of 9 units or fewer resets on a change of ownership or control.

What that means for your loan: a seller's tax bill can be well below what you will pay after you buy, because years of capped increases end when ownership changes. Underwrite taxes on your purchase price, not the seller's bill. The same goes after a big renovation.

Recertification and milestone inspections

Commercial buildings in the City of Miami go through building recertification under the Miami-Dade County Code. Only single-family homes, duplexes, and buildings of 2,000 sq ft or less with an occupant load of 10 or less are exempt. Under the county's current schedule, buildings built in 1993 or later recertify at 30 years, then every 10 years. Miami-Dade says buildings of four stories or more and other threshold buildings need separate inspections by a structural engineer and an electrical engineer.

Florida's milestone inspection law (s. 553.899) is a separate layer for condo and co-op buildings of three or more habitable stories, including mixed-use condo buildings: inspection by December 31 of the year the building turns 30 (or 25 where the local agency requires it), then every 10 years. If phase one finds substantial structural deterioration, phase two follows and repairs must start within 365 days of the report.

Lenders will ask for the latest recertification letter or milestone report and any open permits. Repairs that are due can become a lender holdback, a price reduction or, in a commercial condo, a special assessment. The City of Miami's recertification division is at 305-416-1177.

Example only: closing taxes on a Miami mixed-use building

Example only, not a quote. An investor buys a mixed-use building in the City of Miami for $2,500,000 with a $1,750,000 commercial loan. As of October 2026:

• Deed stamps: a building that is not a single-family residence pays Miami-Dade's $0.60 plus a surtax of up to $0.45, so up to $1.05 per $100 = up to $26,250. Who pays is set by the contract.
• Note stamps: $0.35 per $100 of the loan = $6,125. The $2,450 cap applies only to unsecured notes, not to a mortgage.
• Intangible tax: 2 mills on the loan = $3,500.
• First-year tax estimate: 19.9544 mills on a $2,500,000 taxable value is about $49,886, before any later 10% cap applies to the non-school portion.

Commercial loans are business-purpose credit; Regulation Z exempts credit made primarily for a business or commercial purpose. QMS Lending (NMLS #1781090), an independent broker in Miami, FL, with 100+ lenders, matches your property type and plan to lenders that do that deal and compares term sheets side by side, in English or Spanish. Rates vary daily; call 305-425-1990 for today's pricing. Subject to credit approval and property review.