ADU (Accessory Dwelling Unit) permit in Gainesville, FL
Yes — you need a permit for adu (accessory dwelling unit) work in Gainesville.
You need a building permit and zoning approval to build an accessory dwelling unit (garage apartment, casita, or other detached unit). An ADU is a new dwelling unit, and Florida's exempt list has no Building category, so it is never exempt from permit. Gainesville's land development code allows one ADU as an accessory use in residential zones (Sec. 30-4.16), sets its dimensional limits (Sec. 30-4.17, principal unit up to 1,500 sq ft plus a maximum of one ADU), and governs it under the ADU use standard (Sec. 30-5.36).
| Permit needed? | Yes |
|---|---|
| Where the line falls | You need a building permit and zoning approval to build a… |
| Fee | The code lists no dollar amounts. An ADU is new residential floor area billed under the Chapter 6 permit fee schedule and paid when you file; current amounts are on the city site at www.cityofgainesville.org. |
| Review time | Not in the ordinance |
| Code section | FBC 105.2; Sec. 30-5.36 (ADUs); Sec. 30-4.16; Sec. 30-4.17 |
| Based on | Florida Building Code, Residential, 2023; Gainesville Land Development Code, Ch. 30 |
How to pull the permit
- Put together a site plan showing where the work goes, with dimensions.
- Apply through the Gainesville building department.
- Pay the permit fee when the permit is issued. Work done before that isn't covered.
- Book each inspection listed on the permit as the job reaches that stage.
Either of you can pull it. When a contractor does the work, it is normally their job.
If you skip it
Starting the work before you get the permit makes the permit fees double the normal amount.
Nearby cities, same job
Rules stop at the city line. If your lot is near a boundary, or you work across several towns, this is where they differ.
| City | Distance | Permit? | Where the line falls |
|---|---|---|---|
| Gainesville | — | Yes | You need a building permit and zoning approval to build a… |
| Jacksonville | 61 mi | Yes | You need a building permit and zoning approval to build a… |
| Palm Coast | 67 mi | Yes | You need a building permit to build an accessory dwelling… |
| Daytona Beach | 82 mi | Yes | You need a building permit to build an accessory dwelling… |
| Deltona | 87 mi | Yes | Building a garage apartment, casita, or other accessory d… |
| Orlando | 110 mi | Yes | You need a building permit to build a garage apartment, c… |
See every Florida city on adu (accessory dwelling unit) work
Other work in Gainesville
Questions people ask
How much does a adu (accessory dwelling unit) permit cost in Gainesville?
The code lists no dollar amounts. An ADU is new residential floor area billed under the Chapter 6 permit fee schedule and paid when you file; current amounts are on the city site at www.cityofgainesville.org.. Valuation-based fees mean the number depends on what the job is worth, so the department quotes it when you apply.
I already built it without a permit. What now?
Gainesville can issue a stop-work order and require you to apply after the fact, sometimes with an extra fee. Work that was covered up may have to be opened for inspection. Full walkthrough here.
Does unpermitted work cause problems when selling the house?
Often, yes. A buyer's inspector or the title company may flag it, and lenders can balk at financing a home with open or missing permits. What to do about it.