Garage Conversion ADUsin Northern California
A garage conversion is the fastest, most affordable route to a legal rental unit or extra living space — the structure already exists; we make it livable and lawful. Insulation, windows, kitchen, bath, and the utility upgrades that turn parked-car square footage into income.
Licensed & Insured · CSLB #1130548 · 5.0★ on Google, Yelp, Thumbtack & Angi
The Work
Done Right, Documented, and Inspected
Done right, a conversion is indistinguishable from purpose-built space. Done wrong (or unpermitted), it's a problem at sale time. We only do it right.
Every project runs under Sarmento Bros. Construction Inc. — CSLB #1130548, fully insured with general liability and workers' compensation. Based in Manteca, we serve businesses and property owners across the Central Valley, East Bay, and greater Northern California.
What We Handle
- ✓ Full garage-to-ADU conversions
- ✓ Insulation, drywall, and egress windows
- ✓ Kitchen and bathroom installation
- ✓ Electrical service and subpanel upgrades
- ✓ HVAC — typically ductless mini-split
- ✓ Permits and final inspections
How It Works
A Straightforward Process
01
Walk & Scope
We meet at your space, listen to what you need, and scope the job honestly — including the parts other bids leave out.
02
Fixed Estimate
A written, itemized estimate with a real schedule. Free, and good numbers — not a teaser that grows later.
03
Permits & Build
We handle drawings, permits, and inspections, then build with our own crews and trusted trade partners.
04
Walkthrough & Closeout
Final walkthrough together, punch list closed, documents handed over. Done means done.
Common Questions
Garage Conversion ADUs FAQs
Do I have to replace the parking I lose?+
In most California cities, no — state ADU law eliminated replacement-parking requirements for conversions in most situations. We confirm your city's current rules during the free consult.
What does a garage conversion typically cost?+
Meaningfully less than a detached ADU since the shell exists. The swing factors are the kitchen, bathroom plumbing runs, and electrical service. Site visit gets you a fixed number.
How long does a conversion take?+
Construction usually runs 8–12 weeks after permits. Permits vary by city — often faster for conversions than new builds.