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 Montclair
If you’re searching for a General Contractor in Montclair, you’re likely weighing a remodel, an addition, or an ADU on an infill lot where every square foot counts. San Mateo Construction handles the full scope, from roofline to foundation, with one accountable team managing the permits, the materials, and every trade in between. We know the 91763 grid, the setbacks, and the housing stock, and we price the work honestly before a single wall gets opened. Call us at (855) 901-7266 to schedule a free estimate.
Why San Mateo Construction Is Montclair’s Preferred General Contractor Company
Montclair homeowners don’t need a contractor who treats the city like an afterthought between bigger Inland Empire jobs. They need someone who knows that the permit counter on Central Avenue moves at its own pace, that the post-war tract homes off Ramona and Palo Verde have framing quirks from the 1950s, and that a rear-yard addition on a 5,000-square-foot lot brings setback questions before the first trench gets dug. Our General Contractor team has worked enough of these lots to know where the complications live, and we carry that into every quote we write.
San Mateo Construction is led by Noel Carrington, and the structure of how we work reflects what actually matters to a Montclair homeowner: one licensed contractor, one contract, and a scope that covers exterior systems and interior finishes together. When you’re in a house built before Title 24 energy codes existed, you don’t want a remodeler who only handles cabinets and calls someone else for the wiring panel. You want a team that measures the roof, the walls, the kitchen, and the rear yard as one project.
We answer our phone. We show up when we say we will. We write change orders in plain English. And for Montclair specifically, we understand that a delayed inspection can idle a whole project for a week, so we stage inspection sign-off into the schedule from day one rather than treating it as an afterthought.
Styles & brands we work with
Licensed General Contractor in Montclair
A Licensed General Contractor in Montclair is the single point of responsibility for a remodel, addition, or ADU, and that matters more here than in newer cities. Most Montclair work is infill construction on already-developed 91763 lots, which means the contractor is navigating variances, older utility connections, and existing structures that rarely surrender space without a fight. A licensed general contractor manages the permits, the subcontractors, the material procurement, and the quality control across every trade, from foundation work through final paint.
Homeowners call us when the project is too large or too interdependent to hand to a single trade. A room addition that ties into the existing roofline, a kitchen remodel that opens up a load-bearing wall, or a rear-yard ADU that needs its own subpanel and sewer lateral, these are general-contractor projects. In Montclair, they almost always involve a variance or a lot-coverage review, and we handle that paperwork as part of the contract.
Permit and Variance Work
Because Montclair is essentially built out, the planning counter is half the job. We spend real time on setback variances, lot-coverage calculations, and zoning reviews for rear-yard ADUs and room additions. When we quote a project, we include the permit fees, the plan check, and the inspection scheduling as line items, not vague “administrative costs” buried at the end.
Change Orders That Protect the Owner
No contractor can see behind every drywall panel before demolition. What separates a professional from a guesser is how surprises get priced. We write allowances into the contract for the systems most likely to fail in a 1950s Montclair home: wiring, framing, waterproofing, and subfloor. When something turns up, the owner sees a written price and approves it before we continue. That’s a line we don’t cross.
Residential General Contractor in Montclair
A Residential General Contractor in Montclair deals with the specific conditions of this housing stock: post-WWII and 1950s-70s single-story tract homes, many on small lots with aging utility connections and stick-frame construction. The work is rarely cosmetic. It’s opening up walls, upgrading panels, replacing failed waterproofing, and building additions that comply with today’s codes while respecting the footprint of a house that’s been standing for 60-plus years.
We take on kitchens, bathrooms, whole-home remodels, and the structural work underneath them. A typical Montclair kitchen remodel runs $14,000 to $45,000 depending on whether walls move, and a bathroom remodel runs $9,000 to $28,000 depending on what the plumbing rough-in exposes once the tile comes off. These are real ranges for this market, not national averages.
Opening Older Montclair Homes
The defining moment on most of these projects is the first wall we open. That’s when we learn whether the wiring is cloth-wrapped Romex from the Eisenhower administration, whether the framing was notched for old plumbing runs, and whether the waterproofing behind the original tile has failed after half a century of Pomona Valley heat. We plan for that moment during the estimate, not after it happens.
Whole-Home Scope Under One Contract
The same team that re-roofs a Montclair home can remodel its kitchen, replace its windows, and pour a paver driveway in the rear yard. You’re not assembling a patchwork of separate vendors with separate schedules and separate warranty fights. That single-contract structure is what makes a general contractor valuable here, where the house, the lot, and the city’s requirements are all interconnected.
Trusted Brands We Service in Montclair
Montclair homeowners don’t need us to push whatever happens to be sitting in a warehouse. We carry relationships with more than 50 name-brand suppliers, so the conversation is about what makes sense for your house and your budget, not what we can offload. On the exterior side, we install James Hardie siding, which handles the dry heat and Santa Ana winds of the inland Pomona Valley better than products designed for coastal fog. For ADUs and prefab construction, we work with manufacturers including Plant Prefab and Boxabl, which gives Montclair homeowners a build path most traditional remodelers can’t offer. If you need a permitted backyard structure, Tuff Shed rounds out the simpler end of the spectrum. You pick from curated name-brand options, and we do the installation.
See the difference
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After
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After
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AfterCommon General Contractor Problems We See in Montclair Homes
- Cloth-wrapped wiring and undersized panels. Homes built in the 1950s and 1960s often have original electrical service that can’t handle a modern kitchen or an ADU subpanel. The moment a permit triggers a code upgrade, the panel replacement becomes a line item you either planned for or didn’t.
- Failed waterproofing behind original tile. In a hot, dry climate that still sees occasional heavy winter rains, old shower pans and unsealed tub surrounds fail quietly for years. By the time the tile comes off, the subfloor underneath is often gone.
- Framing that was modified, notched, or undersized. Previous owners and handymen cut corners, literally. We regularly find floor joists notched for plumbing drains, headers missing over window openings, and framing that doesn’t meet current seismic requirements for San Bernardino County.
- Lot-coverage fights on infill parcels. Montclair’s small lots mean a rear-yard ADU or a room addition often pushes against the city’s lot-coverage limits. Getting the variance approved before construction starts is the difference between a project that finishes on schedule and one that stalls at the planning counter.
Pricing for General Contractor in Montclair, CA
General contractor pricing in Montclair reflects the age of the housing stock and the reality of infill permits. A home addition runs $45,000 to $130,000 depending on the foundation work and the tie-in to the existing roofline. A rear-yard or garage-conversion ADU typically runs $90,000 to $220,000, with the lower end for conversions and the upper end for detached new construction. A garage conversion runs $30,000 to $80,000. A bathroom remodel starts around $9,000 and can reach $28,000 once you move plumbing and upgrade the electrical.
| Project | Typical Montclair Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Bathroom Remodel | $9,000 – $28,000 |
Every estimate is free, and we put it in writing with line-item allowances for the systems most likely to need work once we open the walls. Call (855) 901-7266 to get yours.
We Also Serve Cities Near Montclair
Our work in Montclair has us moving through the surrounding foothill and valley cities every week. Homeowners in Claremont, Ontario, Upland, and La Verne call us for the same kind of infill remodels and ADU work, and we bring the same inspection-first scoping and brand access to every one of those cities. If you’re just across a city line, the approach doesn’t change.
Serving Montclair, CA — Our Local Coverage Area
We’re based in the Montclair 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 Montclair
Cloth-wrapped wiring, undersized or notched framing, and failed waterproofing are the three most common findings in 1950s-70s tract homes. We plan for them by writing allowances and inspection points into the original contract so the homeowner sees a written price before any additional work starts. Call (855) 901-7266 and we’ll walk you through what your specific house likely holds.
Often, yes. Montclair is essentially built out, and most rear-yard additions on 91763 lots push against setback and lot-coverage limits. We handle the variance paperwork as part of the general contract and we won’t start construction until the city has signed off, because building first and asking later is how projects get red-tagged.
By writing the allowances before demolition starts. A permit will almost certainly require an electrical panel upgrade on an older Montclair home, and it may require framing reinforcement or waterproofing upgrades. Our contract includes line-item allowances for those systems, and any overage is priced and approved in writing before we proceed. The number on the estimate is the number you can plan around, because we planned for the surprises.
Because the city learns about the work either way, and an unpermitted remodel becomes a disclosure problem when you sell the house. San Bernardino County and the city of Montclair require permits for structural work, electrical upgrades, and ADUs, and the inspection record is the proof that the work was done to code. We schedule inspection sign-off into the construction plan so walls never have to be reopened later.
We pour concrete and schedule exterior work in the early morning during the hottest months, and we schedule roofing and siding work around Santa Ana wind events, which can shut down high-profile material handling for days at a time. Heat also cures stucco and paint differently here, so we adjust the trade sequencing accordingly. It’s a scheduling reality of working in this part of the Inland Empire, and we build it into the timeline from the start.
If you’re planning a remodel, an addition, or an ADU on a Montclair lot, call San Mateo Construction at (855) 901-7266 to schedule your free estimate. Written by Noel Carrington, Owner at San Mateo Construction, serving Montclair and the surrounding Inland Empire cities.