Two-Car Garage Conversion Cost across San Diego County
A two-car garage conversion in San Diego County typically runs toward the higher end of each conversion type's range, since roughly 400-500 square feet gives enough room for a full ADU layout with a separate bedroom, living area, kitchen, and bathroom rather than a single combined room.
What moves the price
- Whether the extra square footage supports a separate bedroom vs. a studio layout
- Additional insulation, drywall, and flooring material for the larger footprint
- HVAC sizing for the larger conditioned space
- Conversion type chosen (bedroom vs. JADU on an attached garage vs. full ADU)
What's included
- Layout planning that makes use of the full footprint
- Insulation, drywall, and flooring sized to the larger space
- HVAC sized for roughly 400-500 square feet
- Full exterior wall infill for the wider garage door opening
Common questions
Is a two-car garage big enough for a full ADU with a separate bedroom?
Yes, a typical two-car garage at roughly 400-500 square feet fits a one-bedroom ADU layout with a separated bedroom, living area, kitchen, and bathroom, rather than a studio-style combined space.
Does a two-car garage conversion cost double a one-car conversion?
Not quite double, since fixed costs like permits, HVAC equipment, and the kitchen or bathroom package do not scale directly with square footage. Expect a meaningful increase, but not a straight-line doubling.
Can I convert half a two-car garage and keep parking in the other half?
Some homeowners split the garage, converting one bay to living space while keeping the other as a parking or storage bay. This affects the fire-rated wall placement and needs to be confirmed with your permit reviewer.
Need a written two-car cost for your project?
Insured local crews across San Diego County put the scope in writing.