Home Additions in Los Gatos, CA

GS Design and Build provides home addition services for Los Gatos homeowners who need more space without moving.

Call (415) 933-2547
  • Added square footage increases usable living space without relocating from Los Gatos
  • New additions are designed to match your home's existing roofline, exterior materials, and architectural details
  • Hillside and flatland lot conditions are assessed and addressed with proper engineering and foundation planning
  • Expanded floor plans, such as primary suites or family rooms, directly support higher resale value in a competitive local market
  • Full-scope project management covers design, structural plans, and Town of Los Gatos review coordination
  • In-law suites and attached living quarters create flexible space for multi-generational households
A two-story Los Gatos home with a newly completed room addition, showing matched exterior siding, aligned rooflines, and a landscaped hillside lot. The addition connects seamlessly to the original structure along a residential street in Los Gatos, California.

Expert Home Additions in Los Gatos, CA

GS Design and Build handles home additions for Los Gatos homeowners from initial design through final inspection. We work on room additions, second-story expansions, primary suite additions, and in-law units. Our team manages the full scope: structural plans, architectural drawings, and coordination with the Town of Los Gatos Building Division. Los Gatos requires Architecture and Site Review for most additions that change a home's exterior or add significant square footage. We build designs that meet those review standards from the start, reducing the chance of revisions. Many Los Gatos properties sit on hillside lots near the Santa Cruz Mountains foothills. These sites call for specific grading, foundation work, and engineered structural solutions. We account for those site conditions before breaking ground. Whether your home is in Almond Grove, Glenridge, Blossom Hill, or Belwood, we match new construction to your existing roofline, materials, and exterior details. If you are ready to add space, contact GS Design and Build for a project consultation.

What's included

  • Added square footage increases usable living space without relocating from Los Gatos
  • New additions are designed to match your home's existing roofline, exterior materials, and architectural details
  • Hillside and flatland lot conditions are assessed and addressed with proper engineering and foundation planning
  • Expanded floor plans, such as primary suites or family rooms, directly support higher resale value in a competitive local market
  • Full-scope project management covers design, structural plans, and Town of Los Gatos review coordination
  • In-law suites and attached living quarters create flexible space for multi-generational households
15+ Years Residential Construction Experience
Family-Owned and Operated
ADU Specialists
Full Remodel Services
Multi-City Service Coverage

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Home Additions FAQ

Common questions about home additions in Los Gatos, CA.

Yes, we manage the Architecture and Site Review submission for your Los Gatos addition. Our designs are built to meet Town review standards from the first draft.

We build room additions, second-story expansions, primary suite additions, and in-law units in Los Gatos. Each project is designed to match your existing home's structure and exterior.

Yes, we design and build second-story additions for Los Gatos homes, including properties with hillside terrain. Our team handles structural engineering and architectural drawings for upper-level expansions.

We assess your Los Gatos lot's slope, access, and soil conditions before design begins. Foundation and grading plans are built into the project scope to address hillside site requirements.

We design every addition in Los Gatos to align with your home's current roofline, exterior materials, and architectural details. This approach supports smooth Town review and consistent curb appeal.

We work throughout Los Gatos, including Almond Grove, Glenridge, Blossom Hill, and Belwood. Each neighborhood has its own architectural character, and we design additions to fit it.

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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