Home Additions & ADUs
in Lafayette, CA

We offer home additions & adus in Lafayette, 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 Lafayette, CA?

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

We offer remodeling, finish carpentry and cabinetry services in Lafayette.

The local housing includes 1950s–70s ranch homes on wooded lots, many now extensively remodeled. Some post-war properties have space for an addition or ADU. We assess the lot and any existing garage during the feasibility review.

We serve Lafayette, including Happy Valley, Burton Valley, Trail neighborhood and Reliez Valley. Project planning here accounts for wooded hillside parcels with tree ordinances and fire-zone construction rules. We assess foundations, drainage and space on the lot when planning an addition or detached unit.

Permits and inspections in Lafayette

Permits for work in Lafayette go through the City of Lafayette 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 Lafayette 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 Lafayette?

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