Home Additions & ADUs
in Brentwood, CA

AZ Elevated Builders provides home additions & adus in Brentwood. We're a family-run, CA-licensed contractor based here in Brentwood. Contact us for a free on-site estimate.

Who offers home additions & adus in Brentwood, CA?

AZ Elevated Builders provides home additions & adus in Brentwood, California. We are a family-run, licensed and insured general contractor based in Brentwood, serving the surrounding Contra Costa County area. Estimates are free, every trade on our crew has 15+ years of experience, and all work carries a written warranty of up to five years. We speak English and Spanish. Call (925) 812-3150.

5.0 Google Reviews ·CA Licensed & Bonded ·Free Estimates ·Warranties up to 5 Years ·Financing Available ·Hablamos Español

Detached ADU guest house with pool at dusk

We design and build primary-suite additions, kitchen expansions, family rooms and second-story additions. Rooflines, windows and finishes are planned to work with the existing house.

An ADU can provide space for family or a rental unit. We handle feasibility, California's ADU requirements, local permitting and utilities through final inspection.

Planning your project in Brentwood

Based in Brentwood, we serve Shadow Lakes, Deer Ridge and the neighborhoods off Balfour Road.

The local housing includes 1990s and 2000s subdivisions wrapped around a much older downtown core. Newer lots can be compact and may require HOA architectural review alongside city permits. We consider both during design.

We serve Brentwood, including Shadow Lakes, Deer Ridge, Brentwood Park and Garin Ranch. Project planning here accounts for expansive clay soil and triple-digit Delta summers. We assess foundations, drainage and space on the lot when planning an addition or detached unit.

Permits and inspections in Brentwood

Permits for work in Brentwood go through the City of Brentwood Building Division. Additions and ADUs are the most review-heavy work we do — setbacks, lot coverage, utilities and California's ADU rules all get checked before a shovel moves. We handle the permit application and coordinate inspections.

What's included

Room additions & home extensions
Primary suite & bath additions
Detached & attached ADUs
Garage conversions
Feasibility & permit management
Utility connections & upsizing
Full kitchens & baths in every unit
Finish levels matched to the main house

What to expect

Your Brentwood project starts with a free on-site estimate and written scope. Our crew coordinates the trades, keeps the site clean and provides a written warranty of up to five years. Hablamos español.

Frequently asked questions

Are ADUs legal in Brentwood?

Yes — ADUs are legal in Brentwood. California law requires cities to allow ADUs on most residential lots, and Brentwood processes them under those state rules. We confirm setbacks, size limits and utility requirements for your specific parcel during the free feasibility visit.

What does an ADU cost to build?

It varies with size, site and finish level — a garage conversion is a different project than a detached new build. We price it in a written scope after walking your property, and financing options are available.

How long does an addition take?

Design and permitting typically run 2–4 months depending on the city; construction runs 3–6 months for most additions and detached ADUs. We provide a written schedule and keep you updated weekly.