ADU Builders in San Ramon, California
Families across San Ramon are using accessory dwelling units to solve multigenerational living and generate rental income. As full-service ADU builders, we take San Ramon projects from feasibility to final inspection — designed for the cool microclimates, fog belts and seismic activity.
Typical cost
$245k–$510k
Permit time
6–10 weeks
Est. rent
$2,550+/mo
Population
84,000
Popular ADU types in San Ramon
Our most requested projects in San Ramon are detached backyard cottages and two-story ADUs over garages. Newer subdivisions in San Ramon often have tighter side yards, so we frequently recommend attached ADUs or converting an existing garage to keep costs down.
Design-wise, San Ramon 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 San Ramon 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 6–10 weeks here.
At $2,550–$4,100 per month in rent, a new ADU in San Ramon can pay for itself in roughly 9.5 years.
San Ramon ADU FAQs
How much does it cost to build an ADU in San Ramon?
Most San Ramon ADUs we build land between $245k and $510k, 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 San Ramon?
State law requires cities to act on complete ADU applications within 60 days. In practice, San Ramon permits typically take 6–10 weeks when plans are submitted complete — which is what our in-house drafting team focuses on.
What can I rent an ADU for in San Ramon?
Based on Bay Area rental trends, a new 1-bedroom ADU in San Ramon commonly rents for $2,550–$4,100 per month, putting typical payback around 9.5 years.
What are the biggest challenges for ADUs in San Ramon?
In San Ramon 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 detached backyard cottages a good option in San Ramon?
Yes — detached backyard cottages are among the most popular projects we build in San Ramon. Corner lots and alley-access lots in San Ramon are ideal for ADUs with their own street entrance and separate address.
ADU builders near San Ramon
Get a free ADU feasibility check in San Ramon
Tell us about your lot. We'll review zoning, setbacks and utilities and send a ballpark budget — no obligation.