Based in Napa and serving St. Helena, Calistoga, and our neighbors in Sonoma, Solano, and Green Valley, we’re a full-service ADU builder with the experience to navigate local codes, streamline approvals, and deliver exceptional results. Our in-house team of designers, builders, and project managers ensures seamless communication, consistent quality, and on-time, on-budget completion.

JS Design & Build – ADU Contractor in Napa, CA

About JS Design & Build

Expert ADU Builders in Napa & Sonoma Valleys

At JS Design + Build, we simplify Accessory Dwelling Unit (ADU) construction by managing every part of your project under one roof — from initial design concepts to the final walkthrough.

Based in Napa and serving St. Helena, Calistoga, and our neighbors in Sonoma, Solano, and Green Valley, we’re a full-service ADU builder with the experience to navigate local codes, streamline approvals, and deliver exceptional results. Our in-house team of designers, builders, and project managers ensures seamless communication, consistent quality, and on-time, on-budget completion.

Whether you’re adding an income-generating rental, creating a private guesthouse, or expanding space for family, we provide the expertise and accountability you need for building an ADU successfully.


JS Design & Build Reviews

Miguel Ponce

2025-03-03
"JS Design did an outstanding job on my large remodel project in Napa. Their attention to detail and craftsmanship were truly top-level. From start to finish, communication was excellent, making the entire process smooth and stress-free. The admin team and crew were highly professional, ensuring that the work site remained organized and well-protected throughout the project. Everything was executed exactly as we had discussed and envisioned. I highly recommend JS Design for anyone looking for quality work and a team that truly cares about delivering exceptional results!"

Virginia Ramos

2025-02-12
"Called and hung up called again no one answered they didn't understand me"

Hermes Hernandez

2024-01-11

Raj Choudhary

2023-09-26
"I was looking for a high quality one stop shop for my extensive home remodel in Napa, CA. Being aware of the difficulties coordinating a design team and drawings with the actual builder, I wanted someone who could handle both seamlessly. JS Design Build was that company. I initially visited their website, which is elegantly designed and left a strong impression upon me with the work they have done. Then I reached out to Judy Schindler the JS in the name! and she promptly called me back. Our initial conversation was great, I could tell she knew how to both design the home I wanted and then build it. She was also very honest about the timeline from design to build, as well as the costs. She let me know right away what I was getting myself into, no surprises! The design phase was great. Judy is an excellent communicator and she knows how to extract the answers she needs out of you, a rare talent! Once the design was set, we moved in to the build phase. JS Design Build took care of everything including permits. The fact that they were the designer and builder allowed them to handle things quickly in the field as they popped up. When you demo an older home, surprises can pop up which then lead to design changes. This was the reason I wanted a design build firm to do my project. The communication was great throughout the entire process. Before construction began, Judy personally visited my neighbors and left them her contact info. My neighbors told me how nice she was and gave them all her number to call if there were any issues at all during the construction phase. Most contractors try to hide from your neighbors so that you can field the complaints instead of them. The construction phase went by as scheduled, with a lot of great communication and photos being sent to us. More importantly, JS Design Build made the process fun and enjoyable. Aside from her great eye for design, Judy has a charisma about her that puts you at ease and you just know that you are in great hands. Her company and all their employees are very professional and talented. The experience was first class. I hope I can buy another home one day just so I can have Judy re-design it."

Opening hours

Monday 9:00AM - 5:00PM
Tuesday 9:00AM - 5:00PM
Wednesday 9:00AM - 5:00PM
Thursday 9:00AM - 5:00PM
Friday 9:00AM - 5:00PM
Saturday -
Sunday -

Location

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