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Accessory dwelling unit permit cost — St. Petersburg, FL

Looking for accessory dwelling unit permit cost 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.

Frequently asked in St. Petersburg

What are the disadvantages of ADUs in St. Petersburg?
How much does an ADU cost in Florida?
What are the rules for ADUs in Florida?

Florida's ADU rules are primarily set at the local level, so St. Petersburg has its own specific ordinances. These typically address lot coverage, setback requirements, and the maximum number of ADUs allowed per parcel. It's essential to consult the city's planning department for precise details. We can help you understand these regulations.

Is ADU allowed in Maryland?

While our services are focused on St. Petersburg, Florida, it's important to know that ADU regulations vary greatly by state and municipality. Maryland has its own distinct laws regarding accessory dwelling units. If you're interested in Maryland, you'll need to research their specific local requirements. We operate within Florida's guidelines.

What are the rules for ADU in California?

California has generally been proactive in promoting ADUs, often with statewide mandates that simplify their development. This can include streamlined permitting and fewer local restrictions. However, California's regulatory environment is quite different from Florida's. For St. Petersburg, we follow Florida's established rules.

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

All cities in Florida →

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, Crescent Lake, Tyrone — and every surrounding area.

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