ADU Rules in Jacksonville, FL — 2026 Guide
Check if your Jacksonville property qualifies for an ADU in 20 seconds
Jacksonville ADU Rules at a Glance
Jacksonville is considered ADU-friendly. Here are the key regulations.
- Jacksonville allows ADUs by right in residential zones under FL statewide law.
- Maximum ADU footprint of 50% of the primary structure.
- No minimum lot size requirement for ADUs under state preemption.
- Duval County flood zone maps affect many properties — elevation certificates often needed.
What ReadyPermit Checks for Jacksonville Properties
Enter any Jacksonville address and get an instant ADU feasibility analysis covering:
Zoning Compliance
Verify your Jacksonville lot is zoned for ADU construction under current FL and local rules.
Setbacks & Coverage
Check required setbacks, lot coverage limits, and height restrictions for your specific parcel.
ADU Size Limits
Calculate the maximum ADU square footage allowed based on your lot size and primary dwelling.
Permit Requirements
Understand what permits and approvals Jacksonville requires before you can break ground.
Flood & Hazard Zones
Identify if your property falls in a flood zone, fire zone, or other hazard overlay.
Lot & Parcel Data
Pull parcel boundaries, lot dimensions, and existing structures from county records.
Check Your Jacksonville Property Free
Enter your address below. In under 20 seconds you will know if your Jacksonville lot qualifies for an ADU — no phone calls, no waiting.
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