Cost of accessory dwelling unit — Miami, FL | AccessoryDwellingUnit Services

Looking for cost of accessory dwelling unit 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

Building an ADU involves several variables that shift the total investment. Your site conditions, the type of foundation, and the quality of finishes you choose will dictate whether you land on the lower or higher end of the spectrum. Because every lot is unique, we provide a breakdown of your specific project requirements to ensure full transparency. Exact pricing confirmed free on the call.

Frequently asked in Miami

What are the disadvantages of ADUs in Miami?

Potential disadvantages in Miami can include navigating the city's specific zoning ordinances, which can be intricate, and the upfront construction costs. You'll also want to consider the impact on your property's utility usage and any potential changes to property taxes over time. Careful planning can mitigate these concerns.

How much does an ADU cost in Florida?

The cost of an ADU in Florida, including Miami, varies significantly based on its size, design, and the materials used. Factors like foundation type, plumbing, and electrical work are major components of the overall price. To get an accurate idea for your specific property, a professional quote is necessary.

What are the rules for ADUs in Miami?

Miami has specific regulations for Accessory Dwelling Units that cover aspects like lot size, setbacks from property lines, and maximum dwelling size. It's crucial to consult the latest city ordinances to ensure your ADU plans comply. These rules are in place to maintain neighborhood character and safety.

Is an ADU allowed in Florida?

Yes, ADUs are allowed in Florida, but the specific rules can differ significantly from one municipality to another. Miami has established its own set of regulations that permit ADUs under certain conditions. Understanding these local requirements is essential for a successful project.

Funding opportunities for ADUs can vary by state and locality. It's always a good idea to research any available grants or incentives specific to your area when planning your ADU project.

Can I build an ADU on my property 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, Brickell, Coral Gables, South Beach, Little Havana, Coconut Grove — and every surrounding area.