Garage-conversion apartment
A garage conversion apartment turns an existing attached or detached garage into an ADU — typically 240–600 sq ft of finished living space with kitchen, bath, sleeping area, and private entrance.
How garage-conversion apartment actually works.
A garage conversion apartment turns an existing attached or detached garage into an ADU — typically 240–600 sq ft of finished living space with kitchen, bath, sleeping area, and private entrance. The trade-off is losing the garage as parking and storage; many homeowners retain one garage bay and convert the other.
The build requires insulating the existing walls (most garages aren't insulated), adding a floor system over the slab, framing in the garage door opening, installing egress windows, tying into existing or adding new HVAC, and routing plumbing for the kitchen and bath. Florida's 2026 ADU rules clarified garage-conversion regulations.
The execution details that decide outcome.
Egress window per FBC R310. Required in the sleeping area.
Slab moisture barrier under the new floor. Critical for finish flooring longevity.
Parking impact. Lose a bay, lose a place to park — affects resale in some neighborhoods.
Other adus & in-law suites outcomes I've built.
Read the Clay County adu & in-law suite guide.
Tier-by-tier costs, the full permit walkthrough, and the FAQs Mark hears most often.
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