Looking for accessory dwelling unit permit cost in Miami, FL? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Miami and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

Frequently asked in Miami

What are the disadvantages of ADUs in Miami?

Potential disadvantages include the significant upfront construction costs in a high-cost area like Miami and navigating the city's rigorous permitting process. You'll also need to consider how an ADU might affect your property's existing footprint and potential for flooding in some areas. A local pro can guide you.

How much does an ADU cost in Florida?

What are the rules for ADUs in Miami?

Miami has specific zoning ordinances for accessory dwelling units, which often address lot size, setbacks, and maximum size relative to the main dwelling. There are also regulations concerning parking and utility connections. A local expert can detail these rules for your specific address.

Is an ADU allowed in Florida?

Yes, accessory dwelling units are allowed in many cities and counties throughout Florida, including Miami, under specific local ordinances. State legislation has encouraged their development to address housing needs. Each municipality will have its own set of requirements.

What is the permit cost for an ADU in Miami?

Can I build an ADU on my property in Miami?

Whether you can build an ADU in Miami depends on your property's zoning and adherence to city ordinances, especially concerning lot coverage and setbacks. Given Miami's density, space can be a consideration. A local expert can assess your property and guide you through the approval process.

Also serving nearby: Hialeah · Miami Gardens · Miramar · Hollywood · Pembroke Pines

All cities in Florida →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

455,924residents

12,665per sq mile

8ZIP codes served

Serving all of Miami — population 455,924; about 12,665 residents per square mile across 36.0 sq mi. ZIP codes covered include 33101, 33102, 33106, 33111, 33112, 33116, 33122, 33124.

Neighborhoods served in Miami: Coral Gables, Coconut Grove, Brickell, Wynwood, Little Havana, South Beach — and every surrounding area.