Cost of accessory dwelling unit — 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
Building an ADU involves several variables that shift your final total, such as the size of the unit, whether you choose a detached structure or a garage conversion, and the complexity of your site’s plumbing and electrical needs. We help you navigate these choices to keep your project on track. Exact pricing confirmed free on the call.
Frequently asked in St. Petersburg
What's involved in getting an ADU permit in St. Petersburg?
What makes a 'best' ADU for St. Petersburg?
What are the typical ADU construction steps in St. Petersburg?
Are prefabricated ADUs a good option for St. Petersburg?
How much does an ADU permit cost in St. Petersburg?
Can I get an ADU permit in St. Petersburg?
What are the benefits of ADU housing in St. Petersburg?
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, Old Northeast, Crescent Lake, Beach Park, The EDGE District, Kenwood — and every surrounding area.
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