Accessory dwelling unit cost — St. Petersburg, FL
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
Total costs are influenced by the complexity of your site, the square footage of the unit, and the specific utility upgrades needed to support a new home. Choosing between a prefab unit and a custom build also changes your bottom line. We provide exact pricing confirmed free on the call.
Frequently asked in St. Petersburg
How do I find a good contractor for an ADU in St. Petersburg?
What's involved in building an ADU in St. Petersburg?
Are there specific rules for ADUs in Florida?
What's the most affordable way to build an ADU in St. Petersburg?
What does 'ADU' stand for and what is it?
ADU stands for Accessory Dwelling Unit. In St. Petersburg, it's a secondary housing unit on a single-family lot. Think of it as a guest house, in-law suite, or rental apartment. It has its own living space, kitchen, and bathroom. They offer flexible housing solutions. We can help you find pros to build one.
What makes a 'best' ADU in St. Petersburg?
Can I get a pre-built ADU delivered to my St. Petersburg property?
Also serving nearby: Clearwater · Tampa · Lakeland · Plantation · North Port
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of St. Petersburg — population 263,553; about 4,264 residents per square mile across 61.8 sq mi.
Neighborhoods served in St. Petersburg: Downtown St. Pete, The Edge District, Old Northeast, Crescent Heights, Tyrone, Gulfport — and every surrounding area.
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