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 Foster City
Hiring a General Contractor in Foster City means finding someone who understands what this city’s homes actually require. Most of the housing stock here went up between the 1960s and 1980s on engineered fill, ringed by lagoons and levee-protected bayfront. That single fact changes how remodels, additions, and reroofs get permitted, engineered, and built. Our team at San Mateo Construction works regularly throughout the 94404 zip code, from the lagoon-front properties near Port Royal Avenue to the townhome clusters off Edgewater Boulevard. Call (855) 901-7266 to talk through your project with someone who knows the difference between building here and building on native ground.
Why San Mateo Construction Is Foster City’s Preferred General Contractor Company
Foster City homeowners tend to ask sharper questions than most, and that’s a good thing. When you live on fill ground with a lagoon in your backyard, you learn quickly that not every contractor’s quote accounts for what the City will actually require. We’ve built our local reputation by filing plans that pass geotechnical and levee review the first time, not the third. That matters when you’re paying carrying costs on a remodel that’s stuck in corrections.
Noel Carrington, who leads our Foster City work, has walked enough of these lagoon-edge lots to know when a quote needs a drainage plan and when a foundation detail has to be revisited. His team coordinates everything from the initial site assessment through final inspection, including the paperwork that proves your wind-rated roof assembly or fill-zone foundation detail actually got built the way the plans said. Foster City homeowners call us because the quote we give matches the job the City ends up approving.
Styles & brands we work with







Remodeling Contractor in Foster City
A remodeling contractor in Foster City does more than swap finishes. The work here starts with understanding what’s behind the walls and under the slab. Original 1960s and 1970s tract homes, many with Eichler-influenced open plans, were built before modern waterproofing standards and seismic detailing became code. When we open up a kitchen or bath in Foster City, we’re regularly finding post-tension slabs, aging copper supply lines, and shower pans that were never properly waterproofed to begin with. None of that is a reason to panic. It’s a reason to hire a contractor who’s seen it before.
Bathroom remodels in Foster City typically run $9,000 to $28,000. Kitchen remodels range from $14,000 to $45,000 depending on cabinet selection, layout changes, and whether plumbing needs to move. We carry cabinet lines like KraftMaid and Wellborn, countertops from Cambria, Silestone, and Caesarstone, and plumbing fixtures from Kohler, Grohe, and Moen. When a client wants a premium product, we specify it. When the budget calls for something more practical, we recommend Delta or American Standard without apology.
Kitchen and Bath Scope
Foster City kitchens from the late 1960s and 1970s often have low soffits, fluorescent lighting, and a layout that predates how families actually cook now. We handle the full scope: cabinet tear-out, rough plumbing and electrical, flooring, tile, countertops, fixtures, and trim. If the project triggers an existing condition, like a slab leak near a kitchen wall, we address it as part of the same permit rather than treating it as a side job.
Whole-Home and Interior Remodels
Some Foster City homeowners decide to renovate multiple spaces at once rather than live through three separate construction cycles. A whole-home interior remodel lets us coordinate sequencing so the electrical, plumbing, and material deliveries line up behind one permit set and one schedule. We’ve done this on several lagoon-front ranch plans where the homeowner wanted a kitchen, two bathrooms, and new flooring completed in one pass.
Licensed General Contractor in Foster City
A licensed general contractor in Foster City carries a specific kind of responsibility here. The City’s plan review process routes additions and lagoon-edge remodels through geotechnical review and levee, drainage, and setback scrutiny, which means the person signing the permit has to actually understand fill-zone engineering and waterside code requirements. We’re state-licensed and insured, and we pull every permit ourselves. No subcontractor signs for us. When an inspector walks a Foster City job site, we’re the ones answering questions.
Home additions in Foster City run $45,000 to $130,000 based on square footage, foundation scope, and how close the addition sits to a lagoon or levee edge. ADU construction ranges from $90,000 to $220,000. These are big numbers, which is exactly why the pre-construction work matters so much. A quote that skips geotechnical review on fill ground isn’t cheaper. It’s just missing a line item that the City will force you to add later, usually at a higher cost and with a delay attached.
Additions and ADU Construction
On a lagoon-backed ranch tract near Port Royal Avenue, our crew framed a rear addition on the original post-tension slab by first coordinating a geotechnical review and levee-edge setback with the City, then specifying a wind-rated roof assembly and flashing tie-in at the waterside wall. The inspection sign-off cleared on the first pass because our scope of work documented the fill-zone foundation detail and drainage before we ever poured. That’s how licensed work in Foster City should go.
Prefab and Modern ADU Options
We also build ADUs through partnerships with manufacturers like Abodu, Dvele, and Plant Prefab. For a Foster City lot where access is tight or the homeowner wants to compress the construction timeline, a prefab ADU can make sense. The same permit and geotechnical requirements still apply, and we handle them the same way we would for a stick-built structure.
Trusted Brands We Service in Foster City
We maintain relationships with more than 50 name-brand suppliers across every major home system, which means Foster City homeowners choose from curated options rather than whatever a random sub happens to have on the truck. Roofing from GAF, CertainTeed, and Owens Corning. Siding from James Hardie. Windows and doors from PGT and Therma-Tru. When a Foster City project calls for impact-rated or wind-rated products, we specify PGT windows and the appropriate roof assembly without having to special-order through a third party. Our team coordinates delivery to Foster City job sites, including lagoon-front properties where staging space is tight. You pick the brand and the tier. We handle the logistics and the installation.
See the difference
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After
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AfterCommon General Contractor Problems We See in Foster City Homes
- Quoting an addition on the original slab-and-fill without geotechnical review. This is the most expensive mistake we see from out-of-area contractors. The City flags the foundation during plan review, the permit stalls, and the homeowner gets a change order for engineering and possibly soil testing that should have been in the first quote.
- Treating a lagoon-edge lot like native-ground San Mateo. Setback and levee rules apply to lots that back onto the lagoon network, and they’re not negotiable. Missing them means corrections that stop the draw schedule and push the finish date back by weeks.
- Skipping documented wind-rated roof and flashing assemblies. Foster City’s bayside exposure means reroofs and additions need wind-rated underlayment, fastening patterns, and flashing details. If the paperwork doesn’t document what was installed, the homeowner has nothing to show an insurance adjuster or premium auditor later.
- Underestimating moisture and drainage issues at grade. The lagoon and bay influence groundwater levels and winter rain saturation. Original slab homes often lack proper moisture barriers at grade. A remodel that doesn’t address this can put new flooring, drywall, and cabinetry at risk within a few seasons.
Pricing for General Contractor in Foster City, CA
Foster City project costs reflect both the local market and the engineering reality of building on fill. Here’s what we tell homeowners to expect for major scopes in the 94404 zip code:
| Project Type | Typical Foster City Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Roof Replacement | $8,000 – $20,000 |
What moves the number within each range? For additions, the foundation condition and proximity to a lagoon edge are the big variables. For kitchens and baths, material tier and plumbing relocation drive most of the spread. A Cambria-topped kitchen with custom KraftMaid cabinets lands higher than one using Caesarstone and stock Wellborn boxes. Both get installed to the same standard. Every quote we write for Foster City is line-itemed and includes the permitting, engineering, and compliance paperwork as explicit costs, not surprises. Call (855) 901-7266 to schedule a free estimate.
We Also Serve Cities Near Foster City
Our crews work throughout the mid-Peninsula. If you’re in Redwood Shores, San Mateo, Belmont, or Highlands-Baywood Park, we bring the same permitting discipline and brand access to your project. Learn more about our work as a General Contractor in Foster City, or call us to discuss a project in a neighboring city.
Serving Foster City, CA — Our Local Coverage Area
We’re based in the Foster City 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 Foster City
Yes. Nearly every addition in Foster City goes through geotechnical review because the land is engineered fill over bay mud. The City wants to see a foundation design that accounts for the fill’s settlement characteristics before it issues a permit. A compliant quote includes this review as a line item. A cheap quote ignores it and hands you a change order later. Call (855) 901-7266 and we’ll walk you through what your specific lot needs.
A lagoon-edge lot triggers levee, drainage, and setback scrutiny that interior-only remodels avoid. The City reviews any addition or exterior work that could affect lagoon drainage or levee stability. We’ve seen projects stall for weeks because the original contractor assumed Foster City rules matched San Mateo’s. They don’t. Our scope of work documents the lagoon-edge details before plan review so the permit moves through without corrections.
Foster City’s bayside exposure means reroofs and new roof assemblies need wind-rated underlayment, fastening patterns, and flashing details that meet current code. The proof is the documentation: the product data sheets, the installation spec, and the inspection sign-off that ties them to the permit. We specify systems from GAF, CertainTeed, and Owens Corning that carry the required ratings, and we leave you with the paperwork that proves what got installed. That’s what an insurance adjuster or premium auditor wants to see.
A compliant Foster City quote includes geotechnical review on fill, levee and drainage coordination for lagoon-edge lots, wind-rated roof assemblies with documentation, and a permit set that matches what the City will actually approve. A cheap quote leaves those out because the contractor either doesn’t know they’re required or doesn’t plan to do them. The math catches up either way. Call (855) 901-7266 for a line-itemed estimate that shows exactly what you’re paying for.
Sometimes, yes. If the kitchen or bath work falls under a separate permit that doesn’t depend on the addition’s foundation approval, we can often sequence it to start while the City reviews the addition. That keeps the project moving and shortens the overall timeline. We evaluate this on a project-by-project basis because every Foster City lot has its own constraints. Ask us directly at (855) 901-7266 and we’ll give you an honest answer about what can run in parallel.
Written by Noel Carrington, Owner at San Mateo Construction, serving Foster City and the surrounding Peninsula since the company’s founding.