Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Miami, FL? Call AccessoryDwellingUnit Experts 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 is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.

About this service

Building an ADU involves costs for permits, site prep, foundation, framing, plumbing, and electrical work. Prices fluctuate based on whether you choose a custom design or a pre-planned layout, as well as the complexity of connecting to existing city utilities. Exact pricing confirmed free on the call.

Frequently asked in Miami

What's the best ADU for a Miami property?

The best ADU for a Miami property is one that complies with local zoning laws and maximizes usable space. This could be a detached backyard unit, a garage conversion, or an addition to the main house. The pros can assess your property and discuss options that fit your needs and budget. They focus on functional design and legal compliance.

How do I get an ADU quote in Miami?

To get an ADU quote in Miami, call us. We will arrange for a licensed, insured pro to discuss your project. They will review your property's specifics and your ADU needs. Based on this conversation, they can provide a detailed quote. This initial consultation is free and without obligation.

Where can I find accessory dwelling unit builders in Miami?

What are the requirements for an accessory dwelling unit for rent in Miami?

Requirements for an accessory dwelling unit for rent in Miami include obtaining the proper permits and ensuring the unit meets all safety and habitability standards set by Miami-Dade County. The unit must have its own entrance, kitchen, and bathroom. The pros can guide you through the permitting process and ensure your ADU is ready for legal rental.

What do 'accessory dwelling units ADUs' mean for Miami residents?

For Miami residents, accessory dwelling units (ADUs) mean adding a secondary, independent living space on their property. These can be detached backyard units, garage conversions, or additions. ADUs are a practical way to increase housing options, accommodate family, or generate rental income in the area. They add functional square footage.

What is involved in ADU building in Miami?

What are the best accessory dwelling unit companies in Miami?

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, Kendall, Brickell, South Beach, Coral Gables, Wynwood — and every surrounding area.