If you’re considering adding an accessory dwelling unit to your home, contact your local ADU contractors near Sebastopol: Sightline Builders. Locally owned and operated in Sonoma County, we have over 28 years of experience in the construction industry.

Sideline Builders Inc – ADU Contractor in Sebastopol, CA

About Sideline Builders Inc

If you’re considering adding an accessory dwelling unit to your home, contact your local ADU contractors near Sebastopol: Sightline Builders. Locally owned and operated in Sonoma County, we have over 28 years of experience in the construction industry. We work with you every step of the way, from concept to creation, to ensure your accessory dwelling unit meets all your needs. Whether you’d like to build a small apartment over your garage or a small house with a foundation, our skilled and creative ADU builders with make it a reality. Send us your ideas, and we’ll walk you through all your options.

Accessory Dwelling Units—Unlimited Possibilities

Accessory dwelling units (ADUs) are versatile features that can meet an array of needs and trends for any homeowner. ADUs are generally detached from the main home and can range in size from 500 to 1,200 square feet. They can serve any purpose you need: quiet work from home office, an art or yoga studio, multigenerational living, a guest home, or even a rental. There are unlimited possibilities! As ADU contractors with decades of experience in the Sebastopol area, we can help you build an ADU that completely fits your needs. From adding built-in storage space to high-tech features, if you have a vision, our ADU builders will make it a reality.

Find out What You’re Eligible to Build

For Sonoma and Napa Counties, you can look up your address to determine what you’re eligible to build. The information provides your jurisdiction, recorded use, zone, number of dwellings, approximate lot size, and approximate building footprint for your property. It also summarizes what possible ADU options or ADU combinations could be available to build on your property. When starting your process, contact us to begin the conversations with the local building department and develop preliminary plans.

Our ADU Builders Will Help You Create the Space You’ve Been Dreaming of

As of the last couple of years, the state of California has made it easier to construct ADUs, which in part has helped boost their popularity. Not only do ADUs expand the usable space on your property, but they’re also an excellent way to improve property value. Whether you’d like to construct an ADU for your own use or plan to use it as a rental, working with experienced ADU contractors is the best way to ensure your new building meets both your current and future needs. With a commitment to integrity, sustainability, and communication, we make building high-quality accessory dwelling units streamlined, and efficient. Contact us today with your ideas, and we’ll be in touch shortly to schedule a site visit or virtual interview.


Sideline Builders Inc Reviews

Barry Brown

2025-11-11
"I hired Sightline Builders in 2025 to construct a Trex deck, approximately 18x20, with steps and handrails down to my backyard pavers. They also assembled a 12x12 aluminum pergola kit that I had purchased and secured it to the deck. I could not be any more pleased with the results; the attention to details and the quality of the work exceeded my expectations! The deck looks beautiful and is built so solidly that I think you could park a truck on it. The owner, Jason, was at the job almost every day, and he contributed ideas to the project that I wouldn't have thought of, like flashing between the pergola and roof to prevent a rain drip line, and custom machining of the steel handrails to make them look much nicer. Every member of the crew was very competent and pleasant to work with. And Sightline was the lowest of the three bids I got! They are at the top of my list for any future projects."

Cavin Hyland

2025-09-06
"Working with Jason, Sarah, and the Sightline Builders team on our backyard ADU was an outstanding experience from start to finish. They designed the ADU themselves, and it couldnt have been a better fit for our space. They even managed to preserve our lemon tree a big deal for us!. They went out of their way in so many ways to make the process easier. They dealt with the city and the red tape, kept us informed at every step, and handled all the inspections and subcontractors with professionalism. On top of that, they got the job done in a timely manner and were very considerate of our newborn baby during the entire process, always mindful of noise, schedules, and making things as smooth for us as possible. What really stood out was how much they genuinely cared. They werent just building an ADU; they were helping us create a home for my mother-in-law, and they treated the project with that same level of importance. Their communication, their effort, and their attention to detail gave us total peace of mind. I wouldnt hesitate to recommend Sightline Builders to anyone. Theyre skilled, reliable, and truly caring contractors who go above and beyond. Were so grateful for the space they created for our family."

Michelle Hyland

2025-08-31
"We had the absolute best experience working with Jason, his crew, and Sarah on our ADU project. Building for my mom was such an important undertaking, and while we had an incredibly difficult time dealing with the city and permitting, they stood by us every single step of the way. They went above and beyond throughout the entire project, pushing the city to move the process along, keeping us informed, and never letting us feel alone in the frustrations that came with the red tape. Once construction was underway, everything was handled seamlessly. Jason and his team managed subcontractors, city inspections, and even HUD inspections with professionalism and efficiency. Their communication was excellent throughout the entire process. They always kept us updated, making sure we stayed on budget, and ensuring we never had to compromise on the quality or look we wanted for the space. I truly cannot say enough good things about this team. They made a stressful process so much easier, and I am beyond grateful we chose them for this project. I would recommend them without hesitation to anyone looking for reliable, skilled, and genuinely caring contractors."

Kathleen Withrow

2025-08-29
"I want to sincerely thank Jason and Sarah and all their crew who worked so hard to get me into my new ADU, a stick build in my daughters back yard. Once we got past the permitting process, which took forever, the construction went extremely well. They dealt with all the permitting issues and worked tirelessly to get them approved, which made the process so much easier for us. They are so professional and really take pride in the work they do, sometimes redoing things that just did not work right. They are great at making design suggestions and kept us fully informed and asking for our preferences throughout the build through group text. They have gone above and beyond to get this project completed and I am overjoyed with the final build. I am finally in my own home and simply adore all the wonderful features that were included. They left the surrounding property clean of construction material and I know that is not always the case with builders. Again, it is taking pride in their entire finished project. I would HIGHLY recommend Sightline Builders for any build project you may have. If I could give them more than 5 stars I would. I am so pleased we chose Sightline as our builder for my home!"

Shelley Shirley

2024-10-10
"Sightline Builders, Inc helped us with the complete remodel of our 1970s condo. They did a beautiful job and were quick to respond and provide solutions for problems found during the remodel like a leaking roof and damaged siding. Sightline completely remodeled the kitchen and two bathrooms, entry closet, and cove in living room. They also installed new windows, new stairs, new exterior siding and new appliances. After discovering dry rot and termites, they completely rebuilt the upper deck. Thank you so much to Jason and his team!!"

Specifics

Opening hours

Monday 7:00AM - 5:00PM
Tuesday 7:00AM - 5:00PM
Wednesday 7:00AM - 5:00PM
Thursday 7:00AM - 5:00PM
Friday 7:00AM - 5:00PM
Saturday 8:00AM - 4:00PM
Sunday -

Location

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