Duval County Zoning
ADU Rules for
Jacksonville, Florida
Jacksonville has massive lots compared to Miami, making ADUs very easy to fit.
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Updated for 2026
Zoning Code
R-LD
Local ordinance code.
Max Unit Size
750 sq ft
Living area allowed.
Setbacks
10ft Rear / 5ft Side
Req. distance from lines.
Important Local Restriction
If you are near the river/coast, new 2026 flood maps might require elevated foundations.
Common Questions in Jacksonville
Answers based on the R-LD zoning text and local building department data.
How much does it cost to build an ADU in Jacksonville?
While costs vary by finish level, the average permitted value for accessory structures in Jacksonville is currently around $1,100. Prefab modular units may be cheaper, while custom concrete block construction will be higher.
What is the maximum size for a guest house in Jacksonville?
Under the R-LD zoning ordinance, detached units are typically limited to 750 sq ft. However, state law SB-48 may allow for larger units if they meet specific setback requirements.
What are the setback rules for Jacksonville?
You generally need to maintain a distance of 10ft Rear / 5ft Side from your property lines. Corner lots and historic districts may have stricter overlays.
Can I rent out my ADU in Jacksonville?
Yes. Rental demand in Jacksonville is rated as 'Medium'. While long-term rentals are allowed by right, short-term rentals (Airbnb) may require a separate license depending on your specific neighborhood zoning.
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