What's Required Everywhere
Regardless of county, converting a garage into conditioned living space requires a building permit, and typically triggers review of structural, electrical, mechanical (HVAC), and sometimes plumbing scopes depending on what's added. Expect your local building department to require sealed engineering drawings for any structural changes, such as removing or altering the garage door opening.
County-Specific Considerations
- Miami-Dade & Broward (HVHZ): Any modification to the exterior envelope — including infilling a garage door opening — falls under High-Velocity Hurricane Zone wind-load requirements, which means more rigorous engineering review than in non-HVHZ counties.
- Palm Beach County: Standard Wind-Borne Debris Region framing applies rather than full HVHZ, but coastal zones within the county can carry additional review depending on flood zone designation.
- St. Lucie County: Generally faster review timelines than the larger southeast counties, though flood zone review still applies where relevant.
What Slows Permits Down
The most common delay isn't the county — it's an incomplete submission. Missing structural engineering for the garage door infill, missing HVAC load calculations for the new conditioned space, or missing flood zone documentation where applicable are the top three reasons a garage conversion permit gets sent back for revision.
"We submit garage conversion permits with the structural, HVAC, and flood zone documentation bundled together from the start. It's the difference between a 3-week review and a 3-month back-and-forth."
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