Detached 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
A detached ADU is a standalone building separate from your main house, like a backyard cottage or converted garage. You need this type if you want maximum privacy and don't want to renovate your existing home’s interior. Pricing for detached units is influenced by site excavation, electrical trenching, and the size of the footprint. Exact pricing confirmed free on the call.
Frequently asked in St. Petersburg
Can I build an in-law suite on my St. Petersburg property?
How do I find a good ADU builder in St. Petersburg?
What are the requirements for an accessory dwelling unit in St. Petersburg?
What does 'accessory dwelling unit' actually mean for St. Petersburg homeowners?
What is the typical cost of building an ADU in St. Petersburg?
Is an ADU considered a type of housing in St. Petersburg?
What are the advantages of a backyard ADU 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: Old Northeast, Downtown St. Petersburg, Crescent Lake, Beach Park, Tyrone — and every surrounding area.
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