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 Hillsborough
General contractor work in Hillsborough runs $8,000 to $220,000 depending on scope, with kitchen remodels at $14,000 – $45,000 and whole-home additions reaching $45,000 – $130,000. On the hillside lots east of the Santa Cruz Mountains, almost every project starts with a geotech report before a permit is issued. We know that process cold. Call (877) 752-4194 and you’ll talk to Ken Stafford directly, not a call center.
Hillsborough isn’t a tract-home town. Every street from Crystal Springs Road down toward the Burlingame line has its own slope, fill history, and tree-protection situation. That’s why we send someone who’s worked these lots before, not a salesman with a clipboard.
Why Milpitas Construction Is Hillsborough’s Preferred General Contractor Company
Hillsborough homeowners tend to ask the same three questions before they’ll let anyone on their property: Have you built on hillside lots like mine? Do you know the town’s tree ordinance? Will you stand behind the paperwork? The answer to all three is yes, and we can show you the plans, permits, and manufacturer documentation from past Hillsborough jobs to prove it.
Ken Stafford runs every Hillsborough project personally. That means you get one phone number, one point of contact, and one accountable party from the first geotech conversation through final inspection. Homeowners on hillside streets above the Burlingame line have told us that’s what sold them. Not a bid. The accountability.
We also carry access to more than 50 brand-name product lines, so when a Hillsborough project calls for impact-rated windows or fire-resistant siding, we’re not calling around to see what’s available. We already spec it. That’s the difference between a general contractor who works in Hillsborough and one who just works near it.
Styles & brands we work with
Construction Company in Hillsborough
As a General Contractor and construction company serving Hillsborough, we handle the jobs that flat-lot builders in Burlingame or San Mateo rarely touch: hillside foundations, retaining walls sequenced ahead of rough-in, drainage systems engineered for winter runoff, and structural work that has to survive both soil movement and fire-wildland interface review. A home addition in Hillsborough runs $45,000 – $130,000, and a ground-up ADU typically lands between $90,000 and $220,000, with the geotech and tree-protection requirements baked into the number from day one.
Here’s what that looks like on the ground. Hillsborough’s hillside lots sit on old landslide deposits and undocumented fill in places. Before you pull a grading or foundation permit, the town wants a geotechnical report and often a slope-stability review. On a lot with heritage oaks or redwoods, an arborist report runs parallel. We sequence those studies ahead of any structural work so your schedule doesn’t stall mid-permit.
Structural and Foundation Work
On hillside remodels, the foundation spec is driven by the soils report. We coordinate the geotech engineer, the structural engineer, and the town’s review so the load path is documented before concrete goes in. When the rear of a home sits partly on old fill, we sequence drainage and retaining walls first, like we did on a Crocker Avenue-area lot above Burlingame.
Whole-Home Remodels and Additions
Most Hillsborough remodels are not partial flips. They’re full estate reconfigurations: new roof systems, impact-rated windows, updated shear walls, and often a new ADU built under the same contract. Single-contract accountability matters here because a foundation crew, a roofer, and a window installer each pointing at the other is exactly what a hillside project can’t afford.
Remodeling Contractor in Hillsborough
Hiring a remodeling contractor in Hillsborough means hiring someone who understands that a kitchen remodel here isn’t just cabinets and counters: it’s often tied to structural floor work, window replacement, and exterior wall upgrades to meet current wind and fire standards. Kitchen remodels run $14,000 – $45,000, bathrooms $9,000 – $28,000, and impact window installations $8,000 – $25,000. When we quote a remodel, we quote the full building-envelope scope, not just the pretty layer.
The tree ordinance changes how we plan interiors, because protecting a heritage oak’s root zone can move a foundation line or change how we stage equipment. We work with the arborist’s report, not around it. That’s local knowledge you won’t get from a company that drives in from another county.
Interior Remodeling with Structural Consequences
Removing a wall in a Hillsborough home often means re-engineering the shear capacity of the whole floor. We plan kitchens and bathrooms with an eye on the exterior loads they sit next to. It’s not unusual to spec a new window package or a reinforced shear wall as part of a “kitchen” quote, because that’s what the building actually needs.
ADU and Garage Conversions
ADU construction runs $90,000 – $220,000, and garage conversions $30,000 – $80,000. On Hillsborough lots, both almost always trigger the same geotech and drainage review as a full addition. We work with prefab manufacturers like Abodu, Dvele, and Plant Prefab where it fits, and we handle the site work, foundation, utilities, and permits under the same contract.
Trusted Brands We Service in Hillsborough
We don’t install whatever the supply house happens to have. We spec by name: Belgard pavers for hillside terraces and driveways that need to hold elevation, ActiveYards aluminum fencing for defensible-space boundaries that won’t rust in the marine layer, and Bufftech vinyl for low-maintenance runs on larger estates. Because we keep these lines in active rotation, Hillsborough customers get faster turnaround on parts and replacements without waiting for a special order from the East Coast. Premium brands, proper installation, one accountable team.
See the difference
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AfterCommon General Contractor Problems We See in Hillsborough Homes
- Hillside drainage failures. Winter storms push runoff down the Santa Cruz Mountain slopes, and homes without proper swales, retaining walls, or foundation drains take water at the downhill corner. We see this on older estates built before current drainage codes.
- Undocumented fill and old landslide deposits. Homes built decades ago sometimes sit on compacted fill that was never engineered. The first sign is often a cracked foundation or a sticking door, and the fix starts with a geotech report, not a patch job.
- Outdated windows and roofs on homes in the wildland interface. Hillsborough’s fire-risk zone means old single-pane windows and shake roofs don’t just look tired. They’re a code and insurance liability. We replace them with impact-rated and fire-resistant products that carry the documentation insurers want.
- Heritage tree conflicts. The town’s tree ordinance protects oaks and redwoods, and a remodel that didn’t account for a tree’s protected root zone can stall permit review for months. We pull the arborist report before drawing final plans when a tree is near the work zone.
Pricing for General Contractor in Hillsborough, CA
Here’s what current Hillsborough market pricing looks like for the work we do most often:
| Service | Hillsborough Price Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Roof Replacement | $8,000 – $20,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Kitchen Remodel | $14,000 – $45,000 |
Hillsborough prices run higher than flat-lot towns like San Mateo because the geotech, arborist, and slope-stability work is real and non-negotiable. A cheap quote that skips those line items isn’t cheaper. It just delays the invoice. Call (877) 752-4194 for a written, line-item estimate that includes the documentation Hillsborough actually requires.
We Also Serve Cities Near Hillsborough
We work throughout the Peninsula corridor, including Burlingame, Millbrae, Highlands-Baywood Park, and San Mateo. Many of our Hillsborough clients have family or investment properties in these neighboring towns. If you want a General Contractor in Hillsborough who understands the whole Peninsula market, not just one zip code in 94010, we’d like to talk.
Serving Hillsborough, CA — Our Local Coverage Area
We’re based in the Hillsborough 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 Hillsborough
Hillsborough sits in a designated exposure zone on the eastern slope of the Santa Cruz Mountains, so new construction and substantial remodels must meet current California Building Code wind-load requirements for that hillside exposure, which in practice means engineered shear walls, proper roof tie-downs, and impact-rated windows in many cases. A compliant quote from us always itemizes the exact wind and storm documentation that the Hillsborough building department will ask for at inspection. Call (877) 752-4194 and we’ll walk you through what applies to your specific lot.
Because much of Hillsborough is built on hillside terrain with documented old landslide deposits and undocumented fill soils. The town requires a geotechnical evaluation to confirm the soil can support the proposed work before it will issue a grading or foundation permit. We bring the geotech engineer in first, then sequence the project around the soils report instead of discovering it mid-permit. That’s the only way a schedule holds.
Documented compliance is what separates a covered claim from a denied one. If a retaining wall fails or a window leaks during a storm, the insurer will ask for the engineering, installation, and inspection paperwork. We document every wind load, drainage, and structural detail for the sign-off, and our Hillsborough clients have used that paper trail when their insurer reviewed the property after a runoff event. A contractor who can’t produce that paperwork put your policy at risk.
A compliant quote itemizes the geotech report, arborist report when trees are near the work zone, drainage and retaining-wall scope, wind-load and shear-wall detailing, and the manufacturer documentation for rated windows, roofing, and siding. A cheap quote leaves those as “allowances” or omits them entirely, then they surface later as change orders. We write them into the number up front so the estimate and the final invoice actually resemble each other.
Yes, and they hold it up before the first inspection. Hillsborough’s tree ordinance protects heritage oaks and redwoods, which means a remodel or addition near a protected tree can’t move forward without an arborist report that defines the protected root zone and any required setbacks. We sequence that report alongside the geotech study so the two don’t collide mid-permit. It’s one of the first things we check when we walk a Hillsborough lot.
Planning a remodel, addition, or new build in Hillsborough? Call Ken Stafford at (877) 752-4194 to schedule a free estimate and a walk-through of your property. We’ll tell you what the hill, the trees, and the building department will require, and we’ll put it all in a written quote before you commit to anything.
Written by Ken Stafford, Owner at Milpitas Construction, serving Hillsborough from the first soils report to final inspection.