Upgrade vs conversion
Living-space conversions require permits, egress, and HVAC.
- Epoxy floor and storage: $3,000–$10,000
- Insulated workshop: $10,000–$25,000
- ADU/living conversion: $20,000–$80,000
Epoxy and storage upgrades
Non-living garage upgrades skip many code requirements but still need moisture-tolerant materials.
- Epoxy floor systems: $3–$7/sq ft
- Cabinet and slatwall systems
- Dedicated circuits for EV charger
A garage is a wet, unconditioned box
Insulating and finishing a garage is not a bedroom minus a closet. You still have a slab that wicks, a door that leaks air, and often no vapor plan. Epoxy over a damp slab peels. A heated garage needs a door seal and insulation that meets your climate, not leftover house batts stuffed in the walls.
- Moisture-test the slab before glue-down flooring or flake epoxy
- Fire separation to the house is a code item on many attached garages
- A 240V EV circuit is a separate electrical job — do not bury it in “finishing”
Storage versus a room you pretend is living space
If cars still park there, budget floor coatings, bumpers, and lighting that survives dust. If you are creating a gym or shop, budget HVAC, a sink, and a door that is not the only fire exit. Those are different price bands.
- Gym flooring and a mini-split are not in a “paint and epoxy” bid
- Workshop dust collection and extra circuits show up after the pretty lights
- HOA rules sometimes ban converting a garage to living space — check before you frame