Best accessory dwelling unit — St. Petersburg, FL

Looking for best accessory dwelling unit in St. Petersburg, FL? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve St. Petersburg 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 involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

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Frequently asked in St. Petersburg

What are the disadvantages of ADUs?

Some potential downsides include the impact on your property's yard space and potentially increased utility bills for the main house. Parking can also be a consideration in denser St. Petersburg neighborhoods. Discussing these with experienced professionals is key to mitigating them.

How much does an ADU cost in Florida?

What are the rules for ADUs in Florida?

Florida has some statewide ADU provisions, but local municipalities like St. Petersburg have their own ordinances. These govern things like minimum lot size, setbacks from property lines, and maximum square footage. The pros we work with are up-to-date on these local St. Pete rules.

Is an ADU allowed in St. Petersburg?

Yes, ADUs are generally allowed in St. Petersburg, but specific regulations apply. These often relate to lot size, the type of ADU, and whether it's attached or detached. It's essential to consult with local experts who know the St. Petersburg zoning code.

What is the process for building an ADU in St. Petersburg?

The process usually involves initial design consultation, securing necessary permits from the city of St. Petersburg, construction, and final inspections. Working with experienced contractors who are familiar with local building codes ensures a smoother process. They can handle all the necessary paperwork.

What are common ADU types in St. Petersburg?

Also serving nearby: Clearwater · Tampa · Lakeland · Plantation · North Port

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More on this: HUD ADU resources — ADU policy and financing research.

Service area details

263,553residents

4,264per sq mile

—ZIP codes served

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, The Edge District, North Shore, Jungle Terrace — and every surrounding area.