ADU Rules in Jacksonville, Florida
ADU Rules in Jacksonville, Florida
Florida has no enacted statewide ADU mandate. Fla. Stat. §163.31771 is permissive (may adopt), not mandatory. HB 1343 (2023) is an agricultural-employee-housing bill that died in committee. ADU rules are set locally.
Florida has no enacted statewide ADU mandate. Fla. Stat. §163.31771 is permissive (may adopt), not mandatory. HB 1343 (2023) is an agricultural-employee-housing bill that died in committee. ADU rules are set locally.
Florida has no enacted statewide ADU mandate. Fla. Stat. §163.31771 is permissive (may adopt), not mandatory. HB 1343 (2023) is an agricultural-employee-housing bill that died in committee. ADU rules are set locally.
Permitted ADU Types
- Detached ADU: Standalone structure on the residential lot
- Attached ADU: Addition with own entrance and kitchen
- Garage Conversion: Converting existing garage
- Interior Conversion: Converting existing interior space
Size Limits
| ADU Type | Maximum Size |
|---|---|
| Detached ADU | 1,000 sq ft or 50% of primary dwelling |
| Attached ADU | 50% of primary dwelling floor area |
| Garage Conversion | Existing footprint |
Setbacks
Per Jacksonville Land Development Code:
- Front: Per base zone
- Side: 5 feet minimum
- Rear: 10 feet minimum
Height
- Detached ADU: Maximum 25 feet or per zone standard
- Cannot exceed height of primary dwelling
Flood Zone Considerations
Jacksonville has extensive St. Johns River and coastal flood zones. Many areas are in FEMA Special Flood Hazard Areas. Verify flood zone status before planning.
Parking
Florida has no enacted statewide ADU mandate. Fla. Stat. §163.31771 is permissive (may adopt), not mandatory. HB 1343 (2023) is an agricultural-employee-housing bill that died in committee. ADU rules are set locally.
Permit Process
- Check zoning: Jacksonville's Land Development Code applies across consolidated county
- Flood zone check: Verify FEMA flood status
- Submit plans: City of Jacksonville Building Inspection Division
- Building permit: Florida Building Code applies
- Inspections and CO: Required before occupancy
Contact
City of Jacksonville Building Inspection Division 214 North Hogan Street, Jacksonville, FL 32202 Phone: (904) 630-2489 Website: coj.net/departments/planning-and-development/building-inspection
Disclaimer: Verify current Jacksonville Land Development Code requirements before starting any project.
More about Jacksonville Zoning
Sources
- Jacksonville Land Development Code·library.municode.com·Accessed 2026-04-07·Direct link
- Florida Statutes §163.31771 — Accessory Dwelling Units·flsenate.gov·Accessed 2026-05-24·Direct link