Jacksonville · ADU guide · 2026
ADUs in Jacksonville — rules, costs, and what to expect.
Jacksonville is Florida's largest city by area and one of the most under-built ADU markets in the state. The Duval County zoning code permits ADUs in many residential districts, and the consolidated city-county government simplifies permitting compared to a separate city/county split. Sidesuite is coming to Jacksonville: it's on the rollout list right after Orlando.
What Duval County allows.
The City of Jacksonville (consolidated with Duval County) permits ADUs in many residential zoning districts under its Planning and Development framework. Key parameters:
- Max ADU size: 750 sq ft.
- Setbacks: match underlying zoning — typically 7.5 ft side, 20 ft rear.
- Height limit: 25 ft, one story.
- Owner-occupancy: required in most districts.
- Parking: one additional off-street space.
- Short-term rentals: permitted in most areas with a license.
What a Sidesuite would cost in Jacksonville.
One price for the home. Installation varies by location, so it's quoted for the lot.
| Sidesuite home: 407 sq ft, finished, appliances included | $99,999 |
| Installation: billed separately, quoted for the lot | ~$30,000 est. |
| Your total, before lot costs | $99,999 + installation |
Typical lot costs in Jacksonville
These are the lot-specific costs on any ADU build in Jacksonville. Budget for these on top of the home and installation until your site-plan quote says otherwise.
| Jacksonville building permit + impact fees | $2,200 – $4,800 |
| Foundation + site prep | $8,000 – $16,000 |
| Utility tie-ins | $4,500 – $11,000 |
Jacksonville rental economics
Furnished 1-bedroom rents in Jacksonville's core neighborhoods (Riverside, Avondale, Springfield, San Marco) sit at $1,150–$1,400/month. The beach communities and Mandarin push toward $1,500–$1,800. Lower entry rent than Miami or Tampa, offset by lower permit and site costs. Sidesuite comes unfurnished, so budget for furniture or expect lower rent unfurnished.
How to get an ADU permit in Jacksonville.
- Zoning verification — confirm ADU eligibility via the Jacksonville zoning portal.
- Building permit application — submit the architectural and structural package.
- Plan review — typically 3–5 weeks.
- Permit issuance — construction begins.
- Inspections + CO — standard FBC inspections.
The Sidesuite home is 15 weeks from order to installed. Permits here typically take 5–9 weeks, against 8–14 in Miami.
Jacksonville is an undervalued ADU market.
Sidesuite is coming to Jacksonville, right after Orlando. Send your address to get on the list, and we reply within 48 hours. For a Miami-Dade or Broward address, Check My Lot answers instantly.