Cost to build accessory dwelling unit in Florida
Last updated: September 24, 2026
Thinking about an accessory dwelling unit in Florida? We serve St. Petersburg, Hialeah, Tallahassee, Miramar, West Palm Beach, Miami Gardens, and more. Florida has a subtropical climate with hot, humid summers and mild winters. This weather is generally favorable for construction year-round.
Building an ADU in Florida is often straightforward. The climate allows for consistent building schedules. Local rules in cities like St. Petersburg and Hialeah are important. We help you navigate the permitting process smoothly.
Common questions
What is the cheapest way to build an ADU?
What does ADU stand for?
ADU stands for Accessory Dwelling Unit. It's a second, smaller home on your property. Think of it as a backyard cottage or garage apartment. These units add living space and value.
Are ADUs allowed in Florida?
Yes, ADUs are allowed in many Florida cities. Rules can differ by municipality, including Hialeah. We help you understand local zoning. Adding an ADU can provide extra income or housing.
What is the most expensive part of building an ADU?
Foundation work and structural framing are often the most costly. Plumbing and electrical hookups add significant expense. Labor costs and chosen finishes also influence the total price. We provide a clear quote for your project.
How much does it cost to build an ADU in St. Petersburg?
What is the cheapest way to build an ADU?
Useful reference: HUD ADU resources — ADU policy and financing research.