Home Additions & ADUs
in Napa, CA

Planning home additions & adus in Napa? AZ Elevated Builders offers free estimates with a written scope. Our work carries a written warranty of up to five years.

Who offers home additions & adus in Napa, CA?

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

We offer remodeling, outdoor living and ADU projects across Napa.

The local housing includes Victorian and Craftsman homes downtown with newer development on the outskirts. For an addition to a historic home, we review the siding, window proportions and roof pitch to plan compatible details. We also check whether neighborhood design review applies.

We serve Napa, including Old Town Napa, Alta Heights, Browns Valley and Carneros edge. Project planning here accounts for seismic retrofit considerations and wildfire-zone rules. We assess foundations, drainage and space on the lot when planning an addition or detached unit.

Permits and inspections in Napa

Permits for work in Napa go through the City of Napa 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

Our family-run crew serves Napa, 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 Napa?

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