ADU Builders in Martinez, California
Families across Martinez are using accessory dwelling units to solve multigenerational living and generate rental income. As full-service ADU builders, we take Martinez projects from feasibility to final inspection — designed for the cool microclimates, fog belts and seismic activity.
Typical cost
$250k–$520k
Permit time
4–8 weeks
Est. rent
$2,600+/mo
Population
37,000
Popular ADU types in Martinez
Our most requested projects in Martinez are prefab and modular ADUs and attached ADUs. Newer subdivisions in Martinez often have tighter side yards, so we frequently recommend attached ADUs or converting an existing garage to keep costs down.
Design-wise, Martinez homeowners in the Bay Area tend to favor compact, light-filled modern designs that maximize small urban lots.
Building an ADU in Contra Costa County
Every Martinez ADU we build is engineered around local conditions — especially seismic engineering, sewer lateral rules and high labor costs. We prepare complete plan sets so the city can approve within the state's 60-day review window, typically 4–8 weeks here.
At $2,600–$4,200 per month in rent, a new ADU in Martinez can pay for itself in roughly 9.4 years.
Martinez ADU FAQs
How much does it cost to build an ADU in Martinez?
Most Martinez ADUs we build land between $250k and $520k, depending on size, site work and finishes. Garage conversions sit at the low end; custom two-story units at the high end.
How long does ADU permitting take in Martinez?
State law requires cities to act on complete ADU applications within 60 days. In practice, Martinez permits typically take 4–8 weeks when plans are submitted complete — which is what our in-house drafting team focuses on.
What can I rent an ADU for in Martinez?
Based on Bay Area rental trends, a new 1-bedroom ADU in Martinez commonly rents for $2,600–$4,200 per month, putting typical payback around 9.4 years.
What are the biggest challenges for ADUs in Martinez?
In Martinez and the wider Bay Area, the issues we plan around most are seismic engineering, sewer lateral rules and high labor costs. We review these during a free feasibility check before you commit.
Is prefab and modular ADUs a good option in Martinez?
Yes — prefab and modular ADUs are among the most popular projects we build in Martinez. Corner lots and alley-access lots in Martinez are ideal for ADUs with their own street entrance and separate address.
ADU builders near Martinez
Get a free ADU feasibility check in Martinez
Tell us about your lot. We'll review zoning, setbacks and utilities and send a ballpark budget — no obligation.