Adu cost — Miami, FL | AccessoryDwellingUnit Services

Looking for adu 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.

About this service

The final cost of your ADU is influenced by factors like utility trenching, site excavation, and the complexity of the architectural design. Larger units or those requiring extensive foundation work will naturally cost more than simple interior conversions or small studios. We help you prioritize your budget items to get the most value out of your square footage. Exact pricing confirmed free on the call.

Frequently asked in Miami

What are the disadvantages of ADUs in Miami?

How much does an ADU cost in Florida?

The cost of an ADU in Florida, including Miami, varies greatly based on size, design complexity, and the quality of materials selected. Site preparation, such as necessary groundwork and utility hookups, also significantly impacts the total price. Get a personalized quote for an accurate estimate.

What are the rules for ADUs in Miami?

Miami has specific zoning regulations for ADUs that address aspects like lot size, setbacks, and maximum unit size. These rules ensure ADUs are integrated properly into the community. A local specialist can explain the exact requirements for your property.

Is ADU allowed in Florida?

Yes, ADUs are permitted in many cities and counties across Florida, including Miami, but local regulations are paramount. It's essential to verify the specific rules for your address within Miami-Dade County. We can help you find a pro who understands these local laws.

What affects ADU cost in Miami?

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: Wynwood, Coconut Grove, Coral Gables, Brickell, Little Havana — and every surrounding area.