Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across San Mateo
San Mateo homeowners who need a General Contractor reach us directly at (855) 473-5620. We know the difference between a 1955 ranch in the 94403 tracts and a newer build near Hillsdale, and that changes how we price, plan, and pull permits. If you’re staring at a builder-grade kitchen you’ve outgrown, or a bathroom that’s been waiting on a real gut since you moved in, we can walk the property with you this week. Ruben Castillo runs our San Mateo projects personally, and he’ll give you a straight answer on what it costs before anything gets torn out.
Why San Bernardino Contractors Is San Mateo’s Preferred General Contractor Company
Two things separate us from the other General Contractor in San Mateo outfits you’ll find: our brand relationships, and the way we handle the scope creep that’s baked into Peninsula remodels. Most crews in San Mateo specialize in one trade, and when your kitchen teardown uncovers galvanized supply lines or an undersized subpanel, that trade calls in someone else and you wait. We don’t.
We’ve worked across the 94402, 94403, 94404, and 94497 ZIP codes long enough to know which 1950s ranch homes have copper and which still carry the original galvanized. That’s not trivia. It changes whether your remodel spends its first week in planning review or in rough-in. Homeowners around Beresford, Aragon, and the Hayward Park flats call us because we quote allowances for the plumbing and electrical hiding behind the walls, not just the finish you can see in the showroom. That honesty shows up in how we document change orders, too: written, dated, and signed before any additional work begins.
Styles & brands we work with







Licensed General Contractor in San Mateo
A Licensed General Contractor in San Mateo is the single point of accountability on any residential project where more than one trade has to show up in the right order. On the Peninsula, that means almost every remodel. Kitchen jobs here regularly involve a plumber for the supply lines, an electrician for new circuits, a cabinet installer, a countertop fabricator, and a building inspector for the rough-in and sign-off. One contractor holds that schedule together. When the homeowner plays that role themselves, something always slips: a permit gets pulled late, a tile setter shows up before the drywall passes, the inspector walks in and tags an exposed junction. That’s when remodeling turns into a part-time job with a lawsuit attached.
When you need permits pulled, structural changes calculated, and inspections scheduled in San Mateo, this is the only way to do it without a mess. It costs real money: a kitchen remodel in San Mateo runs $14,000 to $45,000 depending on what’s behind the shape of the walls, and a bathroom sits at $9,000 to $28,000. Those ranges assume licensed plumbing and electrical work, which is always required when you alter any system inside a San Mateo home.
Permit and Scope Discipline
We pull the permits before we swing a hammer on any San Mateo job that alters structure, plumbing, electrical, or exterior envelope. No exceptions. When a project opens a wall and finds unknown conditions, we stop, document what’s there, and bring you a written change order with an allowance number attached, not a surprise.
Warranty-Safe Remodel Path
For newer San Mateo homes still under a builder warranty, we map the pathways that avoid cutting into warranty-covered assemblies without written sign-off from the builder. That’s a plan before demo, not a shrug after the fact. We’ve walked several owners through exactly that conversation.
Residential General Contractor in San Mateo
As a Residential General Contractor working across San Mateo, we coordinate the whole home, not just the room you hired us for. That’s the only way to sequence work on these properties. In the 94402 and 94403 tracts especially, homes sit close enough that a fence, an addition, or even a window change can trip the city’s neighbor-notification requirements. San Mateo planning review scrutinizes shadow, setback, and lot coverage on almost every exterior alteration. A contractor who only does kitchens won’t know that, and you’ll find out when the project stops mid-demo.
For a home addition on these lots, expect $45,000 to $130,000 before finishes, with the lower end assuming you’re bumping out a bedroom and the upper end adding a second story that meets the city’s height and coverage limits. Cabinet installation is $4,000 to $13,000, and countertops run $2,000 to $6,500, though the countertop number moves depending on whether you choose a builder-grade laminate or Cambria quartz with a fabricated edge profile.
Whole-Home Coordination
We’ll run the exterior side from the same plan book: a James Hardie siding replacement sits fine next to a bathroom rough-in, as long as the schedule accounts for both. That’s the job. One crew, one schedule, one punch list at the end.
Builder-Grade Upgrade Path
On newer San Mateo builds, we usually tell owners to sequence the work: kitchen cabinets and counters first, the primary bath second, flooring and trim as a third phase when budget allows. The cabinets and showers are what you live with every day; the rest can wait.
Trusted Brands We Service in San Mateo
We’re authorized to install and service the brands San Mateo homeowners actually ask for by name. That means GAF and CertainTeed roofing systems when the rain finally finds its way through a 20-year-old roof, Grohe fixtures in a primary bath where the builder put in something you’ve hated since closing, and KraftMaid cabinetry when every big-box option looks the same. We carry the line-card access to more than 50 named manufacturers across cabinetry, counters, plumbing, roofing, windows, and hardscaping, which means you choose the brand and we handle the build. That’s the whole point: not “contractor-grade whatever we can get,” but the exact GAF shingle or Grohe faucet you picked.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in San Mateo Homes
- Builder-grade finishes reaching the end of their useful life. Newer San Mateo homes, particularly in the master-planned pockets of 94404, were built with cabinets, counters, and fixtures intended to look fine at the closing walkthrough, not survive a decade of daily use. Owners usually want the kitchen replaced first, and we plan the sequence so a cabinet install doesn’t expose plumbing that has to be redone twice.
- Warranty voidance from unapproved cuts. We’ve walked onto too many San Mateo properties where a previous contractor or a handy neighbor cut into a warranty-covered wall assembly, and the builder then disclaimed the whole envelope. Written approval from the builder before any cut is the only way to keep the coverage intact.
- HOA and architectural review surprises. San Mateo has pockets of newer developments, and many of them carry CC&Rs that govern interior changes if those changes touch shared walls, any exterior penetration, or plumbing that runs through a common assembly. Owners often don’t read the architectural guidelines until after a permit is applied for. We review them before the first saw cut.
- Tight-lot addition constraints in 94402 and 94403. The 1940s-50s platted tracts have setbacks and lot-coverage rules that kill a lot of second-story dreams at plan check. A contractor who doesn’t know San Mateo’s height and shadow review may sell you a design the city will never approve.
Pricing for General Contractor in San Mateo, CA
Real numbers, San Mateo market, current as of this year. The table below is what we quote from, and it’s what we’ll stand behind at the free estimate.
| Project | San Mateo Price Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
What changes the number on a San Mateo job? The age of the rough-in behind the walls, mostly. A 1950s ranch in 94403 with original galvanized and a 100-amp panel will always run higher than a 2015 build with copper and 200 amps. We quote allowances for the unknown conditions up front, so the price doesn’t jump when the wall opens. Estimates are free. Call (855) 473-5620 and Ruben will walk you through it.
We Also Serve Cities Near San Mateo
Our San Mateo crews also run jobs in Highlands-Baywood Park, Foster City, Belmont, and Hillsborough. If you’re on the edge of the city, or your property straddles a service boundary, call us and we’ll tell you straight whether we can get a crew there. That answer is usually yes.
Serving San Mateo, CA — Our Local Coverage Area
We’re based in the San Mateo area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About General Contractor in San Mateo
The kitchen cabinet and countertop package is almost always the first upgrade to make, because it’s what you use every day and it’s where the builder saved the most money on the original build. In San Mateo, that phase runs about $4,000 to $13,000 for cabinets and $2,000 to $6,500 for counters, assuming the wall rough-in doesn’t need major electrical work. The primary bath is usually second, with a full remodel in the $9,000 to $28,000 range. Flooring, trim, and secondary baths can wait, since they don’t affect daily life the same way. If you want us to walk the house and put a sequence on paper, call (855) 473-5620 for a free estimate.
The rule is simple: no cuts into any warranty-covered assembly without the builder’s written approval first, and that approval has to be in writing from someone with authority to grant it. We handle that correspondence for you before any demo starts, and we document every approval against the specific assembly the warranty references. If the builder requires a specific installer or an inspection before you alter a covered system, we schedule around their calendar, not ours. It’s the only way to protect the coverage you paid for at closing.
Sometimes yes, and the answer depends on whether your interior work touches any shared wall, exterior penetration, or plumbing that runs through a common assembly. San Mateo’s newer developments, especially in 94404, often carry CC&Rs with an architectural-review clause that most homeowners never read until something stalls at permit. We pull the governing documents, read the review section, and tell you what’s required before the city permit is even filed. Getting ahead of the HOA is free. Getting behind on it is not.
Two reasons. First, those homes were platted in the 1940s and 50s, and a large share still carry original galvanized supply lines and undersized 100-amp electrical. You don’t see that until the wall opens. Second, even a window change in those tight-lot tracts can trigger San Mateo’s neighbor-notification and shadow/setback review at planning. On a 1955 ranch in the 94403 tracts, our crew opened up a builder-grade kitchen only to find undersized original electrical and galvanized supply lines behind the wall. We pulled permits, handled the rough-in and inspection sign-off, then set KraftMaid cabinets and a Cambria island. We kept the original subfloor where it tested sound, documented every allowance and change order in writing, and walked the owner through a punch list before final. The homeowner kept the builder’s exterior footprint intact so nothing tripped the neighbor-notification review. That’s how you keep a simple remodel from becoming a stalled one.
You can, but only if the design fits within the city’s height, lot-coverage, and setback constraints, and the honest answer is that many second-story dreams in 94402 and 94403 don’t survive plan check. San Mateo planning review scrutinizes shadow, neighbor notification, and building envelope on any vertical addition, and the original 1940s-50s lots were not platted with vertical growth in mind. A home addition in San Mateo runs $45,000 to $130,000, and the lower half of that range assumes you’re going out, not up. We’ll put a real feasibility number on your lot before you spend design money on paper that won’t pass review. Call (855) 473-5620 and Ruben will take a look at the property and tell you what the planning department will say.
Written by Ruben Castillo, Owner at San Bernardino Contractors, serving San Mateo since our first Peninsula project.