General Contractor in San Mateo, CA

San Mateo spans from the downtown corridor to hillside neighborhoods with a strong mix of established single-family homes and newer infill development. The area includes diverse neighborhoods from Laurel Heights to Highlands, each with distinct character and property types. Proximity to Highway 101 and the Peninsula's job centers makes it a sought-after residential area.

Call (415) 933-2547
Service Location

San Mateo, CA

CA Service Area

No extra travel fees for this area

Communities we serve

San Mateo Burlingame San Carlos Millbrae
  • Free On-Site Estimate
  • Licensed & Insured
  • 24/7 Emergency Service
  • Premium Materials
  • Workmanship Guaranteed
San Mateo home's front facade showing updated landscaping and welcoming entrance.

San Mateo, CA

Emergency response available 24/7

Peninsula Experience and Neighborhood-Specific Know-How

We've worked across San Mateo's neighborhoods long enough to understand what works in Laurel Heights versus Highlands, and how to navigate the city's planning department. We respect your property and your neighbors' peace.

San Mateo residents appreciate quality work and honest communication. We provide clear estimates, stick to timelines, and handle cleanup thoroughly.

We're licensed and insured for all San Mateo County work. Many of our clients are repeat customers or referrals from neighbors who trust our work.

At a glance

  • Sister company to Skyline Building & Investments — 17 years of local construction expertise
  • Wind Mitigation Certified — we document roof features that may lower your insurance premiums
  • Premium product lines most contractors don't carry — we explain the differences honestly
  • Available 24/7 for emergency tarping and storm damage response
Call (415) 933-2547

Every service, available in San Mateo, CA

San Mateo homeowners balance property maintenance with the area's fast-paced lifestyle and diverse neighborhood needs. We serve everything from classic Peninsula homes to contemporary updates, and we're familiar with San Mateo's local codes and permit timelines. Our crew works efficiently without cutting corners.

What Santa Clara County homeowners say.

4.9
52 Google reviews

Worked with us?

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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

Recent projects across the panhandle

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Modern renovated mid-century home with wood and white siding, new roof, and updated fencing Campbell, CA

Serving San Mateo, CA

Free on-site estimate. No commitment required.

Our crew knows San Mateo, CA. We will show up on time, assess the job honestly, and give you a clear written number before asking you to decide anything.

Call (415) 933-2547

General Contractor FAQ for San Mateo, CA

Common questions from San Mateo, CA homeowners about our services, process, and coverage.

San Mateo spans from the downtown corridor to hillside neighborhoods with a strong mix of established single-family homes and newer infill development. The area includes diverse neighborhoods from Laurel Heights to Highlands, each with distinct character and property types. Proximity to Highway 101 and the Peninsula's job centers makes it a sought-after residential area.

We cover all of San Mateo, CA, including San Mateo, Burlingame, San Carlos, Millbrae and surrounding communities. Travel does not affect our pricing — you pay for the work, not the drive.

Our crew is based in Campbell, which puts us within a short drive of all San Mateo, CA communities. Our roofing work is backed by 17 years of local building experience across the panhandle.

We handle full home remodels, additions, ADU construction, and custom building projects. Our work covers everything from foundation to final finishing in your area.

Yes, we serve Los Gatos, Palo Alto, San Jose, Mountain View, Sunnyvale, and 12 other Bay Area communities.

Yes. We handle design consultation, site preparation, construction, and all finishing work for residential projects.

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Call (415) 933-2547

Proudly Based in Campbell, CA

Stop by, call, or book online — we're always nearby when you need us.

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