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Custom ADU construction in Sonoma County by Sonoma Residential Services

ADU Resource Center

ADU Builder in Sonoma County

From permits to move-in, we build custom accessory dwelling units that add value, space, and flexibility to your property.

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Building ADUs is what we do — and we do it well.

If you're thinking about building an accessory dwelling unit on your Sonoma County property, you're not alone. ADUs have become one of the most popular — and most practical — home improvement projects in the region. Whether you want to generate rental income, create a space for aging parents, build a home office, or simply add value to your property, an ADU can do all of that and more.

As an experienced ADU builder in Sonoma County, we've guided dozens of homeowners through the entire process — from the initial feasibility assessment and design, through the permitting maze, and all the way to handing over the keys. We know the local regulations inside and out, we work with the county and city planning departments regularly, and we build ADUs that are crafted to the same standard as our custom homes.

We created this resource center to help you understand the process, the costs, the regulations, and the benefits — so you can make an informed decision about whether an ADU is right for you. Explore the pages below, and when you're ready to talk, we're here.

ADU project in Sonoma County

Why Choose SRS

Not just a builder — your ADU partner from start to finish.

Building an ADU involves more than construction. It involves navigating regulations, managing the permitting process, coordinating with the county, making design decisions that affect livability and cost, and keeping the whole project on schedule and on budget. We handle all of it.

We're a family-owned, veteran and woman-owned construction firm with over 50 years of combined family experience. We take on a limited number of projects at a time so we can give each one the personal attention it deserves. When you work with us on your ADU, you work directly with Ryan and Kelly — not a rotating cast of project managers.

50+

Years Family Legacy

Full

Service: Design to Keys

Local

Sonoma County Based

ADU construction project
ADU project in Sonoma County

Get Started

Ready to explore building an ADU?

We offer a free initial consultation to assess your property, discuss your goals, and walk you through the process.