ADU Rules & Zoning in Jacksonville, Florida (2026)
What ADU can you build in your Jacksonville backyard?
Instantly check eligibility for Accessory Dwelling Units (ADUs), like Guest Houses, Garage Conversions, and In-Law Suites.
Key Takeaways: Jacksonville ADU Rules 2026
- Maximum ADU size is 1,000 sq ft OR 50% of the primary dwelling — whichever is smaller
- No owner-occupancy requirement — primary home and ADU can both be rented simultaneously
- No citywide short-term rental ban — ADU can be used for Airbnb with proper local licensing
- Minimum ADU size 400 sq ft (studio) or 550 sq ft (1-bedroom)
- Required setbacks: 5 ft side, 5 ft rear — ADU must not be placed in front yard
- Submit complete permit package via JaxReady portal — incomplete submissions are returned and restart the review clock
- Impact fees $2,000–$8,000+ (transportation, school, parks) assessed on top of permit fees
Jacksonville 2026 ADU Requirements Snapshot
Jacksonville (Duval County consolidated government) allows ADUs in most single-family residential districts. No owner-occupancy requirement. Max 1,000 sq ft or 50% of primary structure. Typical permit timeline 6–12 months. Verify parcel-specific zoning in Chapter 656 before committing to design.
ADU Size Calculator (50% formula, 1,000 sq ft cap)
| Primary Home Size | Max ADU Size |
|---|---|
| 1,200 sq ft | 600 sq ft |
| 1,800 sq ft | 900 sq ft |
| 2,000 sq ft (cap triggers) | 1,000 sq ft (max) |
Whichever is smaller: 50% of primary OR 1,000 sq ft hard cap.
What this means for your lot
- Use the address checker first to verify parcel-specific zoning.
- Confirm setbacks and lot geometry before spending on plans.
- Check short-term rental rules carefully — they vary significantly by city.
Key gotchas
- Incomplete application package — Jacksonville returns incomplete submissions, delaying process
- Setting ADU too close to property lines — 5 ft side and rear setback required
- Unpermitted existing work must be resolved before a new permit can be issued
Building Limits
- Max Size:1,000 sq ft or 50% (lesser)
- Setbacks:5ft side / 5ft rear
- Detached Allowed?Yes
- Max Height:25 ft
- Build Cost Est.:$90,000–$200,000
Rental Rules
No Owner-Occupancy Requirement: Both units can be rented to tenants simultaneously.
Short-Term Rentals: Not prohibited at the city level. State DBPR license required.
Estimated Monthly Income
$950–$1,400/month
Based on 2025–2026 Jacksonville market data
Jacksonville ADU Permit Cost Breakdown
| Cost Item | Amount / Notes |
|---|---|
| Total Estimated Cost | $3,000–$10,000 |
| Building Permit Fee | Based on construction valuation — contact Jacksonville Planning for current schedule |
| Plan Review | Included in building permit fee |
| Impact Fees | $2,000–$8,000+ (transportation, school, parks) — assessed separately |
Incomplete application packages are returned without review — restarts the review clock
Key ADU Restrictions in Jacksonville
- ADU max size 1,000 sq ft or 50% of primary dwelling square footage, whichever is less
- Minimum ADU size 400 sq ft (studio) or 550 sq ft (1-bedroom)
- ADU must be located behind the primary structure or meet standard front setback
Common Mistakes to Avoid in Jacksonville
- Incomplete application package — Jacksonville returns incomplete submissions, delaying process
- Setting ADU too close to property lines — 5 ft side and rear setback required
- Unpermitted existing work must be resolved before a new permit can be issued
Eligible Zones in Jacksonville
Jacksonville ADU — Frequently Asked Questions
Can I build an ADU in Jacksonville?
Yes. Jacksonville permits ADUs by right in eligible residential zones including RSC-1, RSC-2, RLD-60, RLD-80, RLD-100, RMD-A, and RMD-B. Verify your parcel's zoning district using the Duval County GIS portal before starting plans.
What is the maximum ADU size in Jacksonville?
The smaller of 1,000 sq ft OR 50% of your primary dwelling's square footage. On a 2,000 sq ft primary home, your ADU cap is 1,000 sq ft. On a 1,600 sq ft home, it's 800 sq ft. Minimum ADU size is 400 sq ft (studio) or 550 sq ft (1-bedroom).
Do I need to live on the property to build or rent an ADU in Jacksonville?
No. Jacksonville does not require owner-occupancy. You can rent both the primary home and the ADU to long-term or short-term tenants simultaneously.
Can I use my Jacksonville ADU as an Airbnb?
There is no citywide prohibition on short-term rentals for Jacksonville ADUs. Short-term rental operation may require a separate local business license. Confirm current STR licensing requirements with Jacksonville Planning at (904) 255-8300.
How long does the Jacksonville ADU permit process take?
Plan on 6–12 months total: 3–4 weeks for zoning verification and pre-application, 4–10 weeks for design, 25–35 business days for initial plan review, plus inspections and CO. Submit a complete application package — Jacksonville returns incomplete submissions without review, restarting the clock.
Jacksonville Planning Department
Jacksonville Planning & Development
Nearby Cities — ADU Rules
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This page provides general information based on current ordinances and publicly available data as of March 2026. Zoning rules change — verify all requirements with your local planning department before making financial commitments.