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 Millbrae
Most General Contractor work in Millbrae costs between $14,000 and $130,000 depending on scope, with kitchens starting around $14,000 and full home additions reaching $130,000. We serve the entire 94030 ZIP, from the Mills Estates hillside to the flatlands near the BART/Caltrain Millbrae Interchange. When you’re planning a tear-down rebuild, a second-story addition, or a full interior gut on one of Millbrae’s post-WWII ranch homes, call (855) 382-3257 and Norm Castellano will walk you through how we scope the job before we ever quote it.
Why Toolbox Contractors Is Millbrae’s Preferred General Contractor Company
Millbrae homeowners call us because we already know what their lot is up against. Nearly every project here is infill work: a 1940s stucco ranch getting a second story, a small lot getting an ADU out back, or a tear-down getting replaced entirely. We’ve run those jobs on the tight setbacks and old orchard-era soils that define this Peninsula town, and we plan for the SFO flight path and BART corridor from day one.
We’re not a single-trade shop. The same crew that frames your addition also handles the roof, the windows, the siding, and the hardscape. That matters here because Millbrae doesn’t give you room to stage five different subcontractors on a 5,000-square-foot lot. Our General Contractor team runs the whole job, which means one point of accountability from demo to final inspection.
Norm Castellano leads every Millbrae project personally. He’s spent years working the Peninsula’s mid-century housing stock and knows what Millbrae’s planning department wants to see on second-story and ADU submittals. That kind of local fluency is exactly what keeps a Millbrae remodel from stalling mid-permit.
Styles & brands we work with
Remodeling Contractor in Millbrae
A Remodeling Contractor in Millbrae handles interior overhauls on the city’s dominant housing type: 1940s-to-1960s single-story ranch and stucco homes that were built before modern insulation, wiring, and plumbing standards. When a Millbrae homeowner buys one of these homes and wants a kitchen that isn’t original to the Eisenhower administration, or a bathroom that doesn’t share one wall with a 60-year-old galvanized supply line, a full remodel is the answer. Kitchen remodels in Millbrae typically run $14,000 to $45,000, while bathroom remodels land between $9,000 and $28,000. Smaller kitchens start around $9,000 and small bathrooms around $5,000.
Interior scope, old-house reality
Most Millbrae remodels surface what was hidden behind the original plaster: knob-and-tube wiring, galvanized plumbing that’s nearly closed off with mineral buildup, and framing that was never meant to carry the weight of a modern stone countertop. We plan for those discoveries in the estimate, not as change orders. We bring in KraftMaid or Wellborn cabinetry, Cambria or Caesarstone countertops, and Kohler or Moen fixtures so the finished product matches what a Millbrae buyer expects in 2026.
One team, inside and out
Because Toolbox Contractors is a full-scope shop, the crew that guts your kitchen can also replace the windows that are leaking fog moisture into the wall cavity, swap the roof, and re-side the exterior with James Hardie. Most Millbrae remodels turn into envelope projects once the walls are open. With us, that doesn’t mean a second contract.
Licensed General Contractor in Millbrae
A Licensed General Contractor in Millbrae is the entity that holds the license, pulls the permits, and carries the liability for additions, ADUs, and whole-home rebuilds in a city that’s essentially built out. When a Millbrae homeowner wants to add square footage to a 1,100-square-foot ranch on a nonconforming lot, or build an ADU over a garage that sits on Bay-fill-influenced soil, the city and county want a licensed GC on the permit. Home additions in Millbrae run $45,000 to $130,000. ADU construction ranges from $90,000 to $220,000. Garage conversions start at $30,000.
County-level permits and gray areas
Millbrae is small, and some of its larger properties actually fall under San Mateo County jurisdiction for septic, well setbacks, and grading. A lot that looks like Millbrae on a map might need county sign-off before the city will even look at the building permit. We verify jurisdiction before we quote, so you’re not surprised by a hold-up at inspection.
Second-story additions, planned properly
A second-story addition in Millbrae almost always triggers geotechnical review because of the old orchard-era and Bay-fill soils under many neighborhoods. We bring in the soils engineer early, get the foundation design right the first time, and sequence the work around SFO noise restrictions that limit exterior operations. It’s the difference between a smooth build and a foundation rework that costs you three months.
Trusted Brands We Service in Millbrae
We install and stand behind materials from Tamko roofing, Boral siding and trim, PGT impact windows, and CGI impact-rated window and door systems. PGT and CGI matter in Millbrae specifically because homes under the SFO flight path want sound attenuation and impact resistance in the same product. We keep parts and materials moving through our supply chain fast, so Millbrae customers aren’t waiting on a window sash while weather or inspection deadlines pile up. These are brands we’ve vetted for the marine-fog environment that eats budget materials fast.
See the difference
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AfterCommon General Contractor Problems We See in Millbrae Homes
- SFO noise ordinances and BART schedules. Exterior work like stucco, roofing, and framing with pneumatic tools often has to be compressed into specific daytime windows, and crane work near the Interchange needs extra lead time. Millbrae is one of the few places on the Peninsula where the flight path and the rail corridor overlap.
- Old orchard-era and Bay-fill soils. Many of the flatland lots between El Camino Real and the BART tracks sit on filled ground that settles unevenly. Adding a second story or an ADU without a geotechnical report frequently ends with cracked foundations and rework.
- Nonconforming lots and tight setbacks. Millbrae was built out before modern setback codes existed. A house that was legal in 1952 might only have four feet of side yard today. We design additions to work within the existing nonconforming envelope and negotiate with the planning department rather than fighting it.
- Fog-driven moisture intrusion. West-facing walls on the hill side of Millbrae take persistent marine fog for months each year. We see rotted window sills, stucco delamination, and roof decking damage concentrated on those exposures, and we plan envelope work around the wet-winter window.
Pricing for General Contractor in Millbrae, CA
Millbrae pricing runs slightly above the San Mateo County average because infill work costs more: staging is tighter, demo is slower, and permit reviews are more demanding. Here’s what we quote most often:
| Project | Millbrae Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Kitchen Remodel | $14,000 – $45,000 |
What moves the number? Soil conditions drive foundation design, noise constraints drive labor scheduling, and lot constraints drive equipment choices. We write every Millbrae estimate as a line-item quote so you can see exactly where the money goes. Call (855) 382-3257 for a free estimate. No change orders unless you change the scope.
We Also Serve Cities Near Millbrae
We work throughout the northern Peninsula, including San Bruno, Burlingame, Hillsborough, and South San Francisco. If you’re exploring a general contractor, see how we serve Millbrae and the surrounding cities with the same full-scope approach and brand-name materials.
Serving Millbrae, CA — Our Local Coverage Area
We’re based in the Millbrae 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 Millbrae
It compresses it. Millbrae restricts certain high-decibel exterior work, including heavy framing, stucco spraying, and roofing with pneumatic fasteners, to daytime windows that avoid the peak SFO departure rush and BART commute hours. On one tear-down rebuild in the Mills Estates area, we scheduled all exterior stucco and roofing between 9am and 3pm, pre-fabbed wall panels off-site to cut on-site cutting noise, and used a spider crane for the second-story framing. The job passed final inspection two weeks ahead of schedule. Call (855) 382-3257 to talk through how we’d schedule your exterior work.
Because much of Millbrae sits on old orchard-era topsoil over Bay-influenced fill, and a one-story 1950s foundation was never designed to carry a second story. A geotechnical report tells us whether we can reuse the existing footing with a retrofit or need to underpin or replace it. Skipping this step is the single most expensive mistake we see on Millbrae additions, and we don’t skip it. Estimates are free: call (855) 382-3257.
ADU construction in Millbrae requires city building permits, and if the property falls under county jurisdiction for septic, well, or grading, you’ll also need county sign-off before the city will issue a final. The permit path depends on whether your ADU is detached, garage-conversion, or prefab, and we handle the full submittal. Call (855) 382-3257 and we’ll check your parcel’s jurisdiction first, before any design work starts.
We plan deliveries around Millbrae’s narrow residential streets and the BART corridor crossings, and we stage materials off-site or pre-fabricate components when the lot doesn’t allow laydown space. For second-story work on tight infill lots, we use spider cranes and panelized framing to get materials up without blocking the street. We include this logistics planning in the quote, not as a surprise. Free estimates at (855) 382-3257.
Call (855) 382-3257 and describe your project. Norm Castellano or one of our estimators will visit the property, check the lot, the soil history, the existing structure, and the noise constraints. That’s how we write a line-item quote that holds. No ballpark guesses, no change orders unless you change the scope.
Written by Norm Castellano, Owner at Toolbox Contractors, serving Millbrae and the Peninsula.