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.
The City of Jacksonville (consolidated with Duval County) permits ADUs in many residential zoning districts under its Planning and Development framework. Key parameters:
| Tooly unit (delivered, furnished, finished) | $85,000 |
| Jacksonville building permit + impact fees | $2,200 – $4,800 |
| Foundation + site prep | $8,000 – $16,000 |
| Utility tie-ins | $4,500 – $11,000 |
| Total installed cost | $99,700 – $116,800 |
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 all-in cost.
Realistic timeline from contract to move-in: 12–17 weeks. Jacksonville moves notably faster than the South Florida cities on permits.
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