ADU Construction & Build in Los Gatos, CA

GS Design and Build handles full ADU construction for San Jose and Menlo Park homeowners ready to add living space.

Call (415) 933-2547
  • Adds a fully code-compliant living unit to your existing San Jose or Menlo Park lot
  • Increases property market value by expanding usable square footage
  • Creates a dedicated space for family members without requiring a separate property purchase
  • Generates long-term rental income on land you already own
  • Detached units and garage conversions both handled under one contractor relationship
  • Design and build scope managed together, reducing coordination gaps between trades
A newly constructed detached ADU in a San Jose backyard, showing a finished single-story unit with a private entrance, exterior siding, and a small landscaped path leading from the main residence. The unit reflects a clean, modern build consistent with California residential construction standards.

Expert ADU Construction & Build in Los Gatos, CA

GS Design and Build provides ADU construction and build services for homeowners in San Jose and Menlo Park. We manage the full scope of your project, from site evaluation and design to structural framing, electrical, plumbing, and final finishes. Whether you want a detached backyard unit, a garage conversion, or a junior ADU within your existing footprint, we build to California Building Standards Code and local requirements. San Jose is one of the most active ADU markets in California, with permitted ADU projects rising sharply year over year. Menlo Park single-family lots can support both a standard ADU and a junior ADU on the same property, giving you real options for how you use your land. We help you understand what your lot allows before any work begins. Our goal is a finished unit that adds livable square footage, supports multigenerational living, or generates long-term rental income. Call us to talk through your property and get a clear plan in place.

What's included

  • Adds a fully code-compliant living unit to your existing San Jose or Menlo Park lot
  • Increases property market value by expanding usable square footage
  • Creates a dedicated space for family members without requiring a separate property purchase
  • Generates long-term rental income on land you already own
  • Detached units and garage conversions both handled under one contractor relationship
  • Design and build scope managed together, reducing coordination gaps between trades
15+ Years Residential Construction Experience
Family-Owned and Operated
ADU Specialists
Full Remodel Services
Multi-City Service Coverage

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ADU Construction & Build FAQ

Common questions about adu construction & build in Los Gatos, CA.

Yes, most single-family lots in San Jose are eligible for at least one ADU and one junior ADU. GS Design and Build reviews your specific lot and zoning before any work begins.

We build detached ADUs, attached ADUs, and garage conversions in Menlo Park. Each type has different setback and size rules, and we walk you through what fits your property.

No, owner-occupancy is not required for a standard ADU in San Jose under current state law. A junior ADU does require the owner to live on the property.

Detached ADUs in Menlo Park can reach up to 1,000 square feet with a minimum 4-foot side and rear setback on qualifying builds. We confirm exact size limits for your lot before design starts.

No replacement parking is required when you convert a garage to an ADU in San Jose. GS Design and Build handles the full conversion scope, including all required utility work.

Yes, you can rent your ADU in Menlo Park for terms of 30 days or longer. Short-term rentals are not allowed for units approved after January 1, 2020 under current rules.

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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

Real Work. Real Results.

Every photo is from an actual project we completed — no stock images, no renderings.

Ready to start your project?

Talk with GS Design and Build about your goals and get a clear, no-pressure estimate.

15+ Years Residential Construction Experience
Family-Owned and Operated
ADU Specialists
Full Remodel Services
Multi-City Service Coverage
Call (415) 933-2547

Mon–Fri 8:00 AM - 7:00 PM · Sat Closed · Responses within 2 hrs