Accessory dwelling unit construction cost

Looking for accessory dwelling unit construction cost in Miami, FL? Call AccessoryDwellingUnit Solutions 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 budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

The cost of building an ADU depends on your choice of materials, the square footage, and whether you are doing a garage conversion or a new detached build. Site access and utility upgrades also play a big role in the final bill. Exact pricing confirmed free on the call.

Frequently asked in Miami

What are the disadvantages of ADUs in Miami?

The primary disadvantages of ADUs often involve the initial construction investment and the potential for reduced yard space in a densely populated area like Miami. You should also consider how the addition might affect your property's overall aesthetics and your privacy. Discussing these points with a local expert is highly recommended. They can offer tailored insights.

How much does an ADU cost in Florida?

The cost of an ADU in Florida, including Miami, is heavily influenced by its size, design complexity, and the selection of materials. Factors such as utility connections, foundation work, and interior finishes significantly contribute to the overall price. A professional quote will provide a detailed breakdown for your specific project. It's best to get a personalized estimate.

What are the rules for ADUs in Miami?

Is an ADU allowed in Miami?

Yes, Accessory Dwelling Units are permitted in Miami, provided they meet the city's established zoning and building guidelines. These rules often include specifications on placement, size, and ensuring separate utility access. Consulting with qualified builders is the most reliable way to confirm compliance for your specific property. They will ensure your project adheres to all regulations.

What is the process for building an ADU in Miami?

For Miami, Florida, you'll need to inquire about any current local or state-level programs that might be available to offset construction costs. A specialist can help you research potential funding options relevant to your project 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: South Beach, Wynwood, Brickell, Coral Gables, Coconut Grove, Little Havana — and every surrounding area.