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.

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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

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

I hired GS Design and Build for a full remodel on our home in Santa Clara and was blown away by the results. Geri provided a detailed estimate and timeline upfront, and everything stayed on track. Her design sense helped transform a dated layout into an open, modern living space. Her crew was friendly, tidy, and very skilled. They even handled a few surprises during demo without adding delays. It’s hard to find a full remodel contractor who keeps every promise, but Geri does. I wouldn’t hesitate to recommend her for any large-scale renovation project. Truly five-star work.

Patricia R Google review · September 2025

GS Design and Build completed a room addition for us in Foster City, and we’re beyond happy with the outcome. We needed more space for our growing family, and Geri made the entire process seamless. She coordinated with the city, helped with layout ideas, and oversaw every detail. The construction crew was clean, courteous, and clearly experienced. The addition flows beautifully with the original home and feels like it was always there. If you’re looking for a reliable room addition contractor who cares about getting it right, this is the team to hire. Great experience from start to finish.

Corrie Google review · August 2025

Recent projects across the panhandle

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Custom wood cabinetry, black countertops, marble backsplash, concrete flooring, and wood beam ceiling in modern kitchen
Kitchen with wood cabinets, black quartz counters, stainless steel sink and appliances, large windows
Light wood kitchen cabinets with glass doors, black countertops, stainless steel range, and exposed wood beam ceiling

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.

Most ADU projects take 4-6 months from permit approval to completion, depending on size and complexity.

Yes. We manage all Campbell city permits, inspections, and code compliance throughout the project.

Costs vary by size and finishes, typically $150K-$300K. We provide detailed estimates after site evaluation.

Still have questions?

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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

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