ADU Builders in San Bernardino, California
Whether you want a rental unit, a home for aging parents or a studio for adult kids, building an ADU in San Bernardino has never been easier under California's ADU laws. Our team plans every project around the hot, dry summers where cooling loads drive design typical of San Bernardino.
Typical cost
$149k–$327k
Permit time
6–10 weeks
Est. rent
$1,700+/mo
Population
222,000
Popular ADU types in San Bernardino
Our most requested projects in San Bernardino are two-story ADUs over garages and detached backyard cottages. Many San Bernardino parcels built between the 1950s and 1980s have wide rear yards that fit an 800–1,200 sq ft detached unit without touching the main house.
Design-wise, San Bernardino homeowners in the Inland Empire tend to favor stucco-and-tile ranch styles, cool roofs and shaded patios.
Building an ADU in San Bernardino County
Every San Bernardino ADU we build is engineered around local conditions — especially summer heat, larger lots with long utility runs and wildfire zones. We prepare complete plan sets so the city can approve within the state's 60-day review window, typically 6–10 weeks here.
At $1,700–$2,550 per month in rent, a new ADU in San Bernardino can pay for itself in roughly 9.3 years.
San Bernardino ADU FAQs
How much does it cost to build an ADU in San Bernardino?
Most San Bernardino ADUs we build land between $149k and $327k, 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 Bernardino?
State law requires cities to act on complete ADU applications within 60 days. In practice, San Bernardino 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 Bernardino?
Based on Inland Empire rental trends, a new 1-bedroom ADU in San Bernardino commonly rents for $1,700–$2,550 per month, putting typical payback around 9.3 years.
What are the biggest challenges for ADUs in San Bernardino?
In San Bernardino and the wider Inland Empire, the issues we plan around most are summer heat, larger lots with long utility runs and wildfire zones. We review these during a free feasibility check before you commit.
Is two-story ADUs over garages a good option in San Bernardino?
Yes — two-story ADUs over garages are among the most popular projects we build in San Bernardino. Newer subdivisions in San Bernardino often have tighter side yards, so we frequently recommend attached ADUs or converting an existing garage to keep costs down.
ADU builders near San Bernardino
Get a free ADU feasibility check in San Bernardino
Tell us about your lot. We'll review zoning, setbacks and utilities and send a ballpark budget — no obligation.