Florida's ADU landscape has changed significantly. State legislation has preempted many local restrictions, making it easier than ever for Tampa Bay homeowners to build an accessory dwelling unit. Here is what you need to know in 2025.
Florida State ADU Law (HB 1339)
Florida's HB 1339, effective July 2023, requires all Florida municipalities to allow ADUs on any single-family residential lot. Local governments can still regulate setbacks, height, and size, but they cannot outright prohibit ADUs. This is a major change that opened up ADU development across Tampa Bay.
Local Rules by Municipality
| Municipality | Max ADU Size | Rental Allowed? |
|---|---|---|
| St. Petersburg | 750 sq ft or 50% of main home | Yes (long-term) |
| Tampa | 800 sq ft or 30% of lot | Yes (long-term) |
| Clearwater | 650 sq ft | Yes (long-term) |
| Pinellas County | 1,000 sq ft | Yes |
Note: Short-term rental rules (Airbnb, VRBO) vary significantly by municipality and HOA. Always verify current short-term rental regulations with your local municipality before building an ADU with rental income as the primary goal.
Permits Required
All ADUs require building permits in Florida regardless of size. The permitting process typically takes 4-8 weeks. Hawley Construction handles all permit applications, inspections, and coordination with local municipalities as part of every ADU project.
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