ADU Builders in Brea, California
Families across Brea are using accessory dwelling units to solve multigenerational living and generate rental income. As full-service ADU builders, we take Brea projects from feasibility to final inspection — designed for the ocean breezes near the coast and warmer foothill valleys.
Typical cost
$188k–$426k
Permit time
4–8 weeks
Est. rent
$2,300+/mo
Population
47,000
Popular ADU types in Brea
Our most requested projects in Brea are detached backyard cottages and two-story ADUs over garages. Newer subdivisions in Brea often have tighter side yards, so we frequently recommend attached ADUs or converting an existing garage to keep costs down.
Design-wise, Brea homeowners in the Orange County tend to favor clean coastal contemporary and Mediterranean styles that satisfy HOA-minded neighbors.
Building an ADU in Orange County
Every Brea ADU we build is engineered around local conditions — especially HOA covenants, coastal commission review and tract-home utility layouts. We prepare complete plan sets so the city can approve within the state's 60-day review window, typically 4–8 weeks here.
At $2,300–$3,650 per month in rent, a new ADU in Brea can pay for itself in roughly 8.6 years.
Brea ADU FAQs
How much does it cost to build an ADU in Brea?
Most Brea ADUs we build land between $188k and $426k, 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 Brea?
State law requires cities to act on complete ADU applications within 60 days. In practice, Brea 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 Brea?
Based on Orange County rental trends, a new 1-bedroom ADU in Brea commonly rents for $2,300–$3,650 per month, putting typical payback around 8.6 years.
What are the biggest challenges for ADUs in Brea?
In Brea and the wider Orange County, the issues we plan around most are HOA covenants, coastal commission review and tract-home utility layouts. We review these during a free feasibility check before you commit.
Is detached backyard cottages a good option in Brea?
Yes — detached backyard cottages are among the most popular projects we build in Brea. Corner lots and alley-access lots in Brea are ideal for ADUs with their own street entrance and separate address.
ADU builders near Brea
Get a free ADU feasibility check in Brea
Tell us about your lot. We'll review zoning, setbacks and utilities and send a ballpark budget — no obligation.