Home Additions & ADUs
in Alamo, CA

We offer home additions & adus in Alamo, Contra Costa County. Our family-run crew is based in Brentwood, with 15+ years of experience in each trade.

Who offers home additions & adus in Alamo, CA?

AZ Elevated Builders provides home additions & adus in Alamo, California. We are a family-run, licensed and insured general contractor based in Brentwood, serving Alamo and 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 Alamo

Our Alamo services include bathroom remodeling, custom cabinetry, outdoor kitchens and painting.

The local housing includes large custom estates from the 1960s onward, many on acre-plus parcels. Newer lots can be compact and may require HOA architectural review alongside city permits. We consider both during design.

We serve Alamo, including Westside Alamo, Round Hill, Stone Valley and Alamo Oaks. Project planning here accounts for acre-plus lots, private drives and septic systems on some parcels. We assess foundations, drainage and space on the lot when planning an addition or detached unit.

Permits and inspections in Alamo

Permits for work in Alamo go through Contra Costa County Building Inspection, since Alamo is unincorporated. 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

Our family-run crew serves Alamo, with 15+ years of experience in each trade. Estimates are free, financing is available, and our work carries a written warranty of up to five years. Hablamos español.

Frequently asked questions

Are ADUs legal in Alamo?

Yes — ADUs are legal in Alamo. California law requires cities to allow ADUs on most residential lots, and Alamo 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.