Average Garage Conversion Cost across San Diego County
Across the conversion types priced on this site, garage conversions in San Diego County span roughly $40,000 to $150,000, and which type you choose drives almost all of that spread. A simple bedroom or living space conversion sits at the low end, and a full ADU with kitchen, bath, and separate electrical sits at the high end.
What moves the price
- Conversion type (bedroom conversion vs. JADU vs. full ADU)
- Whether plumbing needs to be added or extended
- Attached vs. detached garage
- Finish grade on flooring, fixtures, and cabinetry
What's included
- Permits and plans
- Insulation, drywall, and flooring
- Electrical and HVAC sized to the new use
- Plumbing where the scope requires it
- Exterior wall infill where the garage door was removed
Common questions
What is the single biggest factor in garage conversion cost?
Whether plumbing is required. A bedroom or office conversion with no kitchen or bathroom costs roughly half what a full ADU costs, because plumbing rough-in and fixtures are the largest line item on any unit with a kitchen and bath.
Is a garage conversion cheaper than a home addition?
Generally yes, because the foundation, framing, and roof already exist. A comparably sized new addition typically costs more per square foot than converting existing garage space.
How do I get an exact number instead of a range?
The licensed pro you hire reviews garage size, plumbing distance, electrical capacity, and finish goals, then puts a price in writing. Garage Convert SD sets no prices and does not offer a free consultation.
Need a written average cost for your project?
Insured local crews across San Diego County put the scope in writing.