Bay Area Garage Conversion Contractor. the dense-lot answer.
Garage conversions are how dense Bay Area lots add a legal rental unit without losing yard or fighting setbacks. We convert attached and detached garages into permitted ADUs across Oakland, Berkeley, Richmond, Hayward, San Jose, Sunnyvale, and the Peninsula.
Licensed California contractor · CSLB #1098432 · Bay Area desk · city-by-city review
About Garage Conversion in Bay Area
Bay Area garage conversions favor the homeowner: most cities waive parking replacement under California ADU law, and the existing footprint often clears setbacks the way a new detached unit can't. The work is in the slab, fire separation, MEP, panel, and seismic anchoring of the existing structure.
What we resolve before drawings begin.
- 01
Seismic anchoring of existing garage
Older Bay Area garages often lack proper anchor bolts and sheathing. We retrofit during the conversion — required by most Bay city plan reviewers.
- 02
Fire separation from main house
Attached garages require 1-hour rated assemblies between the new ADU and the main house. We design for this during feasibility.
- 03
Panel, sewer lateral, water meter
Older Bay Area neighborhoods often need a 200A panel, sewer lateral upgrade, or a separate water meter. We scope these into the fixed contract.
Other Bay Area services.
All Bay Area services →Bay Area · Garage Conversion FAQ
Questions Bay Area homeowners ask first.
Start a Bay Area garage conversion brief. We'll review the city's plan-check, seismic upgrades, fire separation, and a fixed-scope contract.
How long does a Bay Area garage conversion take?
10–14 months brief-to-keys: 2 months design, 4–6 months city permit, 4–6 months construction. East Bay tends faster than SF/Peninsula.What does a Bay Area garage conversion cost?
Most Bay Area garage conversions land between $220K and $340K all-in, including permits, MEP, panel and seismic upgrades, and finishes.Will I lose required parking?
California ADU law generally waives parking replacement for garage conversions within ½ mile of transit — most Bay Area urban lots qualify. We confirm at feasibility.Can I convert a detached garage in the Bay Area?
Yes — detached garage conversions are common across the East Bay and South Bay. Setbacks and access requirements vary by city.
Begin your projectin twenty minutes.
A short feasibility review of your lot — what you can build, roughly what it costs, and how long it will take. Free of charge. No sales call afterwards unless you ask for one.
- No obligation
- Reply within 24 hours
- BBB A+ Accredited