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 Los Altos
A general contractor in Los Altos manages the entire build, not just the framing or the finishes. For a tear-down-and-rebuild, a second-story addition, or an ADU on a Los Altos lot, that means one licensed contractor responsible for structural engineering, permitting, tree protection, every trade, and final inspection sign-off. We’re San Mateo Construction, led by Noel Carrington, and we’ve spent plenty of time in Los Altos’s design-review process, working through the specific wind, seismic, and arborist requirements that shape nearly every project here. Call (855) 901-7266 for a free estimate and a straight conversation about what your project actually needs.
Why San Mateo Construction Is Los Altos’s Preferred General Contractor Company
Los Altos homeowners don’t bring us in because they want five separate vendors and a year of phone tag. They come to us because the ranch home they bought on a wide lot in the 94022 or 94024 zip code needs a structural upgrade, and they want one accountable team from roofline to foundation. Our General Contractor team has worked through Los Altos’s resident-driven design review enough times to know that the permit sequence, not the hammer swing, is usually what determines the timeline.
What builds trust in Los Altos is not a flashy flyer. It’s showing up to the pre-app meeting with a plan set that already accounts for the oak canopy behind the property line, and quoting a shear-wall schedule the structural reviewer won’t bounce back. Our brand portfolio spans the materials that matter here: GAF and CertainTeed roofing over new shear walls, Therma-Tru or PGT windows and doors rated for wind exposure, James Hardie siding, and Cambria or Caesarstone countertops once the interior phase begins.
Noel Carrington set San Mateo Construction up so that every system, exterior and interior, runs under one contract. That’s not a convenience pitch. On a Los Altos rebuild, the roofer, the window installer, and the cabinet crew have to sequence around the same structural inspection milestones. When one contractor owns the schedule, the homeowner isn’t the one juggling it.
Styles & brands we work with
Hire a General Contractor in Los Altos
Hire a General Contractor in Los Altos when the project involves structural change, not a cosmetic refresh. If you’re redoing a galley kitchen inside the original ranch footprint, that’s one thing. If you’re opening walls, adding a second story, or building a backyard ADU, Los Altos’s building department will require engineered plans, and those plans have to satisfy wind uplift and seismic shear requirements that a handyperson’s quote will not address. Home additions in Los Altos typically run $45,000 to $130,000, and ADU construction ranges from $90,000 to $220,000, depending on size, site access, and slope.
Structural scope that survives review
In Los Altos, the load path has to be continuous from the foundation anchor bolts, up through the shear walls, and into the roof-to-wall connectors. A quote that does not itemize hold-downs, rated structural panels, and inspection documentation is not a quote for Los Altos. We price it in from the start because we know the reviewer will ask for it.
Tree-aware excavation planning
Hillside lots and edges near Los Altos Hills back onto mature oak and redwood canopies. The town’s tree-protection rules often require an arborist report before excavation, and that report can force footing relocation. We pull the foundation plan back, re-run the shear schedule, and get both plans reconciled before a shovel hits the ground.
General Contractor Services in Los Altos
General Contractor Services in Los Altos cover the full exterior-to-interior scope: re-roofing a ranch, adding a second story, replacing every window and door, then remodeling the kitchen and bathrooms inside the same contract. Most Los Altos work is not small repair. The housing stock is 1950s and 60s ranch homes with original knob-and-tube-era electrical, shallow slab or raised foundations, and galley footprints that no longer match how people live. So the job is usually a major remodel, a full rebuild, or an ADU in the backyard.
Additions and rebuilds
A second-story addition over a post-war ranch requires the existing walls and foundation to be evaluated for the new lateral load. In Los Altos, that often means new anchor bolts, plywood or OSB shear panels, and hold-downs at every corner. A home addition here runs $45,000 to $130,000. A garage conversion, which is a common path to extra living space without touching the lot lines, runs $30,000 to $80,000.
ADU construction
Backyard ADUs are one of the most common projects we quote in Los Altos, partly because the lots are wide enough to support them and partly because the city’s planning culture, while thorough, now treats ADUs as a standard path. Through manufacturer partnerships with Abodu, Dvele, and Plant Prefab, we can offer prefab options that shorten on-site time. Stick-built or prefab, an ADU in Los Altos runs $90,000 to $220,000.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Los Altos
On the window and door side, we regularly install Therma-Tru, PGT, ViewLux, and ECO Window Systems products for Los Altos homes. Why those brands here? Because wind exposure and thermal cycling are real considerations, and a window that meets coastal wind-load ratings isn’t always what’s specified for a sheltered Silicon Valley lot. We help you choose what actually fits the project’s structural and exposure profile, then we order and sequence the install around the inspection milestones. Los Altos customers aren’t waiting on parts shipped from the East Coast. We stock common components and have direct supplier relationships for the rest.
See the difference
Before
After
Before
After
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AfterCommon General Contractor Problems We See in Los Altos Homes
- Knob-and-tube electrical hiding in the walls. On many original 1950s and 60s ranches, the wiring is still original, and any opened wall triggers a full circuit replacement. A quote that ignores this will stall at rough-in inspection.
- Hillside drainage and lot grading. The mild, dry-summer Mediterranean climate means no frost worries, but winter rain hits hard. Poor grading on a sloped Los Altos lot channels water into foundations and crawlspaces, and fixing drainage has to happen before the addition goes up.
- Tree-protection conflicts on oak-adjacent lots. Mature oaks and redwoods trigger arborist review, and root zones can force footing relocation. Without the arborist report priced in, excavation halts mid-scope and the schedule slides.
- Un-documented structural work. If shear panels, nail schedules, and connectors aren’t documented before the drywall closes, the homeowner has no paper trail. That matters later when an insurance policy is reviewed or a claim is filed.
Pricing for General Contractor in Los Altos, CA
Here’s what we tell every Los Altos homeowner on the first call: know the structural scope before you compare quotes. The number below is the total project range for the most common scopes we bid here.
| Project Type | Typical Los Altos Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
What moves the number is the same set of factors every time: slope and soil condition, tree protection, the permit and design-review cycle, and the structural upgrades the existing foundation needs. A compliant quote includes arborist review, rated structural panels, hold-downs, and inspection documentation. A cheap quote leaves those out and the homeowner pays for them when the job stalls. Call (855) 901-7266 and we’ll walk your specific lot and scope against what Los Altos actually requires.
We Also Serve Cities Near Los Altos
San Mateo Construction serves General Contractor in Los Altos and the surrounding communities, including Los Altos Hills, Loyola, Mountain View, and Stanford. If your lot backs up to the hills or sits in the flats near El Camino, the permitting and structural conditions change. We know the difference, and we bid accordingly. Call (855) 901-7266 for a free estimate.
Serving Los Altos, CA — Our Local Coverage Area
We’re based in the Los Altos 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 Los Altos
Los Altos structural plans must demonstrate a continuous load path from the foundation anchor bolts through the shear walls to the roof-to-wall connectors, since the governing loads here are wind uplift and seismic shear, not snow. Your engineer will specify anchor bolt spacing, shear panel type and thickness, nail schedules, and hold-down locations, and the inspector will verify those before walls close. Call (855) 901-7266 to talk through what your addition will need.
Because lots on the hillside and Los Altos Hills-adjacent edges back onto mature oak and redwood canopies, and the town protects those trees through a review process that can restrict excavation within the root zone. The arborist’s findings often relocate footings, which changes the foundation plan and the shear-wall schedule. We reconcile the two before permitting so the project doesn’t halt mid-excavation.
If a wind or seismic event damages the structure, your insurer will review what was built and how it was documented. A file that shows rated structural panels, connector types, and passed inspections supports your position. Walls that were closed without that paper trail leave the owner with a finished stucco exterior and nothing to show the adjuster.
A compliant Los Altos quote itemizes arborist review and tree-protection barriers, hold-downs, rated shear panels, inspection scheduling, and documentation. The cheap quote shows a finish schedule and a foundation line without the structural and tree work, which is why it looks lower. The difference shows up when excavation stops or the structural reviewer rejects the plan set. Call (855) 901-7266 for a line-item quote that will pass review.
Los Altos’s design-review process is resident-driven and thorough, so plan revisions and tree-protection review often add weeks before the permit is issued. A draw schedule tied to inspection milestones has to account for that or the homeowner is paying interest on a stalled job. We build the permit sequence into the timeline before we ever sign a contract.
Written by Noel Carrington, Owner at San Mateo Construction, serving Los Altos and the surrounding Silicon Valley communities.