ADU Construction in Los Gatos, CA

GS Design and Build provides full-service ADU construction for Los Gatos homeowners looking to add livable space to their property.

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  • Adds a fully independent living unit to your lot without subdividing your property
  • Detached ADUs up to 1,200 sq ft give you flexibility for rental income or multigenerational living
  • Exterior design matched to your primary home meets Los Gatos objective design standards
  • Hillside and flatland lot conditions addressed with proper engineering before construction starts
  • Garage conversions and new detached builds handled under one general contractor
  • Increases long-term property value in a high-demand Los Gatos real estate market
A newly constructed detached ADU in a Los Gatos backyard, featuring exterior siding and roofline matched to the primary single-family home. The unit includes a private entrance, windows, and a small landscaped path separating it from the main residence.

Expert ADU Construction in Los Gatos, CA

ADU construction in Los Gatos gives homeowners a practical way to add a fully independent living unit to their existing lot. At GS Design and Build, we handle the entire process from site assessment and design through framing, mechanical work, and final inspections. Los Gatos allows detached ADUs up to 1,200 square feet on most single-family residential lots, with 4-foot side and rear setbacks for new construction. Hillside properties in the HR and RC zones may require additional foundation and drainage engineering due to sloped terrain. We account for those site-specific conditions early so nothing surprises you mid-project. Whether you want a detached backyard cottage, an attached addition, or a garage conversion, we match the design to your lot and your goals. Los Gatos also requires new ADUs to match the exterior materials, roofing, and trim of the primary home. We build to those objective design standards from day one. Call GS Design and Build to talk through what your property can support.

What's included

  • Adds a fully independent living unit to your lot without subdividing your property
  • Detached ADUs up to 1,200 sq ft give you flexibility for rental income or multigenerational living
  • Exterior design matched to your primary home meets Los Gatos objective design standards
  • Hillside and flatland lot conditions addressed with proper engineering before construction starts
  • Garage conversions and new detached builds handled under one general contractor
  • Increases long-term property value in a high-demand Los Gatos real estate market
15+ Years Residential Construction Experience
Family-Owned and Operated
ADU Specialists
Full Remodel Services
Multi-City Service Coverage

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ADU Construction FAQ

Common questions about adu construction in Los Gatos, CA.

Yes, most single-family lots in Los Gatos are eligible for one detached or attached ADU. GS Design and Build can review your specific lot conditions and zoning designation before work begins.

We build detached backyard cottages, attached ADUs, and garage conversions for Los Gatos homeowners. Each type has different setback and design requirements, and we guide you through which fits your lot.

Yes, Los Gatos requires ADUs to use the same exterior wall materials, roofing, and trim as the primary home. GS Design and Build incorporates those objective design standards into every project plan.

Hillside lots in Los Gatos may require additional foundation and drainage engineering due to sloped terrain. GS Design and Build assesses site conditions upfront so those requirements are built into the project scope.

Detached ADUs in Los Gatos can be up to 1,200 square feet with a maximum of two bedrooms. GS Design and Build designs within those limits while maximizing usable space for your specific lot.

No, Los Gatos does not require replacement parking when an existing garage is converted to an ADU. GS Design and Build handles garage conversion projects and confirms all applicable local requirements before construction.

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What Santa Clara County homeowners say.

4.9
52 Google reviews

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From our very first appointment with Gershon, we felt confident we were in excellent hands. He listened carefully to what we wanted, offered thoughtful design suggestions, and walked us through the process and timeline in a clear, transparent way. Every step—from initial design and planning to the finishing touches—was handled smoothly, with consistent updates so we always knew what was happening next. The crew that worked on our home was hard working, professional, and very knowledgeable. They arrived on time, respected our home, and kept the work area as tidy as possible, which we really appreciated. The finished kitchen looks fantastic and functions even better than we hoped and the quality of the workmanship really stands out. Friends and family have already commented on how beautiful and well thought-out the space is. We would not hesitate to hire GS Design & Build again for future projects. If you’re looking for a top-tier contractor for your home remodeling, GS Design & Build are an outstanding choice.

Charles Decker, DC, ACN Google review · June 2026

GS Design and build did an amazing job uplifting my garage. Gheri was the most responsive of the contractors I got quotes from and he was very quick to respond with a reasonable estimate. He was always reachable and ensured the team was very punctual. His crew did a great job completing the job and handling surprises. I didn’t have to contact Gheri for anything during the job. The final work quality was great and my garage looks great! I will highly recommend GS Design and Build for your home improvements Update: i did a bathroom remodel with them 6 months after the garage upgrade and it was amazing! The team has remained consistent with their quality and workmanship!

viswanathan vaidyanathan Google review · June 2026

We used GS Design and Build for a room addition in Redwood City and couldn’t be happier. Geri helped us figure out the best layout for our new sunroom and made sure the style blended with the rest of our house. Her crew worked clean and fast, and everything passed inspection the first time. The project wrapped up on schedule and within our budget. The space gets amazing light and has quickly become our favorite part of the house. If you’re in the market for a room addition contractor who truly listens and executes, don’t look any further.

Ronda Richardson Google review · September 2025

Just got my home addition done! GS design helped us build a new bathroom and a new master bed in new construction. Everything was fully licensed and Geri managed everything at his end. I found Geri on Nextdoor and was nervous before signing him up but to my surprise, I couldn’t have asked for more! He has a lovely team of people who specialize in what they do. Geri cared for me and made sure I am satisfied at each step. He gave me a good run down of what he plans to do in the coming week which was very satisfying. Geri’s rates were also very competitive and he was reasonable when the work order changed. What I liked about Geri a lot is also that his interior designing skills are also very strong so he guided us when the size of the window was off or in making lovely choices of the flooring. You can trust Geri blindly and go with him. You will not regret it. Thanks Geri, for all the great work.

Vedant Dhandhania Google review · April 2022

We live in Redwood City and reached out to GS Design and Build for a second-story room addition. Geri coordinated with our structural engineer and managed the project with confidence. We were impressed with how smoothly everything went. Her communication throughout the process was excellent. The new space has completely transformed our home and given us the extra flexibility we needed. Top-notch room addition contractor and a pleasure to work with.

Deanna Callison Google review · September 2025

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Hours

  • Monday 8:00 AM - 7:00 PM
  • Tuesday 8:00 AM - 7:00 PM
  • Wednesday 8:00 AM - 7:00 PM
  • Thursday 8:00 AM - 7:00 PM
  • Friday 8:00 AM - 7:00 PM
  • Saturday Closed
  • Sunday Closed