Accessory dwelling unit construction cost

Looking for accessory dwelling unit construction cost in Miami, FL? Call AccessoryDwellingUnit Direct 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 variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

The amount you spend depends on the size of the unit, whether you are building from scratch or converting an existing structure, and the quality of your finish materials. Foundations, utility connections, and local labor rates also play a significant role. We provide exact pricing confirmed free on the call.

Frequently asked in Miami

What are the disadvantages of ADUs?

How much does an ADU cost in Massachusetts?

What are the rules for ADUs in California?

California's state-level ADU mandates are not applicable here in Miami. If you are building in Miami, you must follow the local ordinances that govern your specific neighborhood and property type. Following California rules will only lead to permit denials. Call us to get the correct information regarding the regulations that you must follow for your Miami project.

Is ADU allowed in Maryland?

Whether ADUs are allowed in Maryland has no impact on your rights as a property owner in Miami. You must follow the zoning laws established for Miami to ensure your project is legal and safe. Do not confuse Maryland regulations with those governing your lot in Florida. Call us for guidance on the specific rules that apply to your Miami home.

What are the rules for ADU in California?

The building rules in California are designed for a different regulatory framework than the one we have in Miami. If you own property in Miami, you must comply with our local building codes regarding structure size and placement. Using California rules will only lead to permit issues. Call us to understand the actual requirements for an ADU build in Miami.

You need to explore local Florida financing options to fund your construction project properly. Do not base your financial planning on California incentives that do not apply here. Call us for advice on how to plan your budget for a Miami build.

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

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