Accessory Dwelling Units
Expanding Your Possibilities
ADUs are one of the smartest investments you can make in your property — whether it's for rental income, housing a family member, or a home office. As a general contractor in Sonoma County, we've built dozens of ADUs and know the process inside and out.
Explore ADU SolutionsAccessory Dwelling Units
We build ADUs (accessory dwelling units) across Sonoma County — detached cottages, garage conversions, and junior ADUs within existing homes. The permitting process can be confusing, but we've been through it enough times to keep things moving. We handle design, permits, and construction so you have one team managing the whole project.
Want to learn more about ADUs?
Visit our ADU Resource Center for in-depth guides on benefits, Sonoma County regulations, costs, and a gallery of our completed projects.
01
From Feasibility to Keys
Not every property is a straightforward ADU candidate — setbacks, utility connections, and lot coverage all come into play. We start with a feasibility review to make sure your project is viable before you spend money on design. From there, we handle the plans, engineering, Title 24 energy compliance, and permitting. Once approved, construction typically takes 6-9 months depending on size and complexity. You'll have a dedicated project manager keeping things on track.
02
Making Small Spaces Work
An ADU might be 400 or 1,200 square feet — either way, the layout has to be smart. We design ADUs with full-size kitchens, proper storage, good natural light, and outdoor connections that make the space feel bigger than it is. We pay attention to ceiling heights, window placement, and material choices that keep the unit feeling open and comfortable. These aren't afterthought structures — they're real homes.
03
Where We Build ADUs
We build ADUs throughout Sonoma County — Santa Rosa, Petaluma, Healdsburg, Sebastopol, Windsor, Sonoma, and the unincorporated areas. We also take on ADU projects in Marin County. Each jurisdiction has slightly different rules, and we know the specifics for each one. As a residential contractor in Sonoma County, we have strong relationships with local planning departments that help keep the permitting process on track.
Project Gallery
Our Work
Client Review
"Ryan and team are excellent. Super professional, very skilled, very hard working, really easy to work with. The team gives personal attention to every detail and yet somehow they manage to be incredibly fairly priced given all that."
Mart Haitjema — Google Review
Common Questions
Frequently Asked Questions
What is an ADU?
An ADU (accessory dwelling unit) is a secondary housing unit on a single-family lot — sometimes called a granny flat, in-law unit, or backyard cottage. A JADU (junior ADU) is a smaller unit created within the existing footprint of your home.
What are the benefits of building an ADU?
Rental income is the big one — a well-built ADU in Sonoma County can generate $2,000-$3,500/month. ADUs are also great for housing aging parents, adult children, or as a dedicated home office or studio. They increase your property value too.
Can I build an ADU on my property?
Most single-family lots in Sonoma County are eligible for at least one ADU under current state law. We offer a free feasibility review to check your specific property — setbacks, utility access, and lot coverage all factor in.
How long does it take to build an ADU?
Construction typically takes 6-9 months. The design and permitting phase adds another 3-6 months before that. We'll give you a realistic timeline during the planning phase.
Do you build ADUs in Marin County?
Yes — we build ADUs in Marin County as well as throughout Sonoma County. Give us a call to discuss your project.
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