A garage conversion is the most cost-effective square footage you can add to a Bay Area home — the foundation, walls, and roof already exist, so you're finishing space rather than building it from scratch. It's the fastest path to an extra bedroom, a real office, or an income-producing ADU.
ODL Construction converts garages properly: code insulation, permitted electrical and plumbing, real foundations and egress, and finishes that make the space feel like part of the house — not a converted garage. We handle whether you want a habitable room or a fully independent ADU.
From a Union City conversion that adds a bedroom for a multigenerational family to a Sunnyvale garage-to-ADU built for rental income, we bring it up to code and finish it right.
What's included
- Garage-to-living-space conversions (bedroom, office, gym, studio)
- Garage-to-ADU conversions with kitchen and bath
- Code insulation, heating, and Title 24 compliance
- Permitted electrical and plumbing
- Proper egress windows and doors
- Foundation and floor leveling
- Replacing the garage door with finished wall and windows
- Permits and inspections
Our process
- 1
Assessment
We evaluate the garage, your goals (room vs. ADU), and what code requires to make it habitable.
- 2
Design & fixed proposal
We design the layout and deliver a fixed-scope proposal.
- 3
Permits
We pull the permits — including ADU ministerial review if it's an ADU — and handle Title 24.
- 4
Build
Insulation, framing, systems, egress, and finish that integrates with the house.
- 5
Inspection & handoff
We pass inspection and hand over finished, code-compliant living space.
Garage Conversion cost in the Bay Area
Garage to living space (room)
Insulated, finished habitable room — bedroom, office, or studio.
$60,000 – $120,000
Garage to ADU
Full independent unit with kitchen, bath, and separate entrance.
$150,000 – $250,000
Typical Bay Area ranges, not a quote. Whether it's a simple room or a full ADU with kitchen and bath is the biggest cost driver, along with foundation and utility work. Fixed proposal after a site visit.
Remodel now, pay monthly. Ask about flexible financing options for your project.
Financing options →Timeline
A habitable-room conversion often takes 4–8 weeks; a garage-to-ADU typically runs 3–4 months including permitting.
Permits & code
Garage conversions require permits for the change of use, insulation/energy (Title 24), electrical, egress, and — for ADUs — the state's ministerial ADU review. We handle all of it.
Key things to consider
- Room vs. ADU: a kitchen and bath turn a conversion into an income unit but add cost.
- Parking rules have relaxed for ADUs, but confirm room-conversion parking impacts.
- Proper insulation, egress, and moisture control separate a real conversion from a code violation.
- Replacing the garage door with a finished wall is what makes it stop looking like a garage.
