Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
Frequently asked in St. Petersburg
What are the disadvantages of ADUs?
How much does an ADU cost in Florida?
ADU costs in Florida are highly variable, depending on the size, design complexity, and the specific location within St. Petersburg. Site preparation, foundation work, and utility connections are significant cost drivers. Permit fees also contribute to the overall price. A personalized estimate is the best way to gauge your investment.
What are the rules for ADUs in Florida?
Florida has statewide ADU guidelines, but individual cities like St. Petersburg have their own specific ordinances. These rules often address minimum lot sizes, maximum dwelling unit size, and parking requirements. Compliance with these local codes is mandatory. We can help you find the right pros.
Is an ADU allowed in St. Petersburg?
Yes, ADUs are generally allowed in St. Petersburg, provided they meet local zoning and building codes. The city has specific regulations regarding their construction and use as a separate dwelling. Areas like the Beach Drive neighborhood might have unique considerations. A quick call will provide clarity.
What are the rules for ADU permits in St. Petersburg?
Permitting an ADU in St. Petersburg involves submitting detailed construction plans to the city. You'll need to demonstrate adherence to all zoning ordinances, building codes, and safety standards. The permit cost is typically based on the project's estimated value. We can help you get an estimate.
Can I build an ADU in my backyard in St. Petersburg?
Building an ADU in your backyard in St. Petersburg is often possible, but specific setback and lot coverage requirements apply. The city's planning department has detailed rules for accessory structures. These regulations ensure proper spacing and access. A consultation will clarify your backyard's potential.
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, Snell Isle, Downtown St. Petersburg, Gulfport, Tierra Verde — and every surrounding area.
Areas we serve
Browse by state, then city.
Alabama (4)
All of Alabama · Birmingham · Huntsville · Mobile · Montgomery
Alaska (1)
Arizona (9)
All of Arizona · Chandler · Gilbert · Glendale · Mesa · Peoria · Phoenix · Scottsdale · Tempe · Tucson
Arkansas (1)
California (29)
All of California · Anaheim · Bakersfield · Chula Vista · Elk Grove · Fontana · Fremont · Fresno · Garden Grove · Glendale · Huntington Beach · Lancaster · Los Angeles · Modesto · Moreno Valley · Oakland · Oceanside · Ontario · Oxnard · Palmdale · Rancho Cucamonga · Riverside · Sacramento · San Bernardino · San Diego · San Francisco · San Jose · Santa Clarita · Santa Rosa · Stockton
Colorado (4)
All of Colorado · Aurora · Colorado Springs · Denver · Fort Collins
District of Columbia (1)
Florida (10)
All of Florida · Cape Coral · Fort Lauderdale · Jacksonville · Miami · Orlando · Pembroke Pines · Port St. Lucie · St. Petersburg · Tallahassee · Tampa
Georgia (2)
Hawaii (1)
Idaho (1)
Illinois (2)
Indiana (2)
Iowa (1)
Kansas (2)
Kentucky (2)
All of Kentucky · Lexington-Fayette · Louisville/Jefferson County
Louisiana (3)
Massachusetts (2)
Michigan (2)
Minnesota (2)
Missouri (3)
Nebraska (2)
Nevada (4)
All of Nevada · Henderson · Las Vegas · North Las Vegas · Reno
New Jersey (2)
New Mexico (1)
New York (4)
All of New York · Buffalo · New York · Rochester · Yonkers
North Carolina (7)
All of North Carolina · Cary · Charlotte · Durham · Fayetteville · Greensboro · Raleigh · Winston-Salem
Ohio (4)
All of Ohio · Akron · Cleveland · Columbus · Toledo
Oklahoma (2)
Oregon (3)
All of Oregon · Eugene · Portland · Salem
Pennsylvania (2)
Rhode Island (1)
South Dakota (1)
Tennessee (6)
All of Tennessee · Chattanooga · Clarksville · Knoxville · Memphis · Murfreesboro · Nashville-Davidson metropolitan government (balance)
Texas (16)
All of Texas · Amarillo · Arlington · Austin · Brownsville · Dallas · El Paso · Fort Worth · Frisco · Garland · Grand Prairie · Irving · Laredo · Lubbock · McKinney · Plano · San Antonio
Utah (1)
Virginia (5)
All of Virginia · Chesapeake · Newport News · Norfolk · Richmond · Virginia Beach
Washington (4)
All of Washington · Seattle · Spokane · Tacoma · Vancouver
