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
We’re Workshop Contractors, and we’ve spent years working on the postwar tract homes that define Montclair’s 91763 core. Most of the work here isn’t greenfield building, it’s infill: additions on tight lots, garage conversions, ADUs, and full-system remodels on houses built between the 1950s and 1970s. We know how those homes were framed, where the original plumbing runs, and what the Pomona Valley wind and sun do to stucco and roofing over time. That local knowledge means fewer surprises, and a quote that actually holds. Call (844) 384-3361 to schedule a free estimate.
Why Workshop Contractors Is Montclair’s Preferred General Contractor Company
Homeowners in Montclair keep calling us because we handle the scope that other contractors split across three or four different companies. One General Contractor managing the roof, the framing, the windows, the hardscape, and the interior finish work means one schedule and one point of accountability. When a Santa Ana wind event tears a section of roofing loose and the repair requires re-framing a wall, you’re not coordinating a roofer and a carpenter and hoping they agree on the sequence.
We’ve also invested in relationships with 50+ manufacturer brands across roofing, windows, siding, cabinetry, and hardscape. That matters in a city like Montclair where house sizes are modest and lot constraints are real. We can spec a James Hardie siding package alongside a GAF roof, or help a homeowner choose cost-conscious alternatives in the same categories without losing material credibility. Noel Figueroa leads our team, and he’s built the company around one principle: the contractor should carry the full scope, not the homeowner.
Styles & brands we work with
Licensed General Contractor in Montclair
A Licensed General Contractor in Montclair handles the structural, envelope, and interior work that requires permits, plan review, and inspection sign-off. For a city with Montclair’s housing profile, that typically means room additions on small lots, whole-home renovations that reveal aging galvanized plumbing, and garage conversions that require setbacks and surveys before a shovel ever hits the ground. A licensed GC also carries the liability coverage and bond that protect you if a subcontractor’s work fails inspection. Typical Montclair projects run $45,000 to $130,000 for a home addition, and $30,000 to $80,000 for a garage conversion.
Permit-Ready Project Scope
We prepare plans that match what Montclair’s building department actually reviews: lot coverage, rear and side setbacks, wind-load engineering on roofs and stucco, and electrical panel capacity. On postwar tract homes, the original 100-amp panel is often undersized for a modern kitchen or an ADU, which means a service upgrade has to be baked into the quote from day one, not discovered mid-project.
Code-Compliant Structural Work
Montclair’s building stock sits in a wind and thermal load zone that punishes shortcuts. When we re-frame load-bearing walls for a garage conversion or room addition, the engineer of record signs off on the shear and uplift details. We don’t skip the paper trail, because we’ve seen what happens when a homeowner files an insurance claim after wind damage and can’t produce documentation showing the work met current code.
Residential General Contractor in Montclair
A Residential General Contractor in Montclair works across a single-family home’s envelope and interior as one integrated job, not a series of disconnected trades. Here, that often means the flat, small lots of the 91763 core where original detached garages sit within inches of the rear property line. Homeowners come to us for kitchen remodels ($14,000 to $45,000), bathroom remodels ($9,000 to $28,000), roof replacements ($8,000 to $20,000), and full whole-home renovations when a 1960s ranch needs everything from the roof down to the pavers.
Exterior Envelope and Hardscape
The hot, dry summers and Santa Ana events in the Pomona Valley put real stress on roofing, stucco, and windows. We source GAF, CertainTeed, and Owens Corning roofing; James Hardie siding; and pavers from Belgard and Techo-Bloc. When a Montclair homeowner replaces a roof, we spec the wind rating and install method to match what this climate actually demands, and we document it.
Interior Renovation and Additions
Inside, we handle kitchens, bathrooms, and structural work under one roof. A kitchen remodel in Montclair typically includes reworking the original 1960s layout, upgrading the electrical, and installing cabinetry from KraftMaid or Wellborn alongside Cambria or Caesarstone countertops. We source and we install, so material selection and labor never separate into two chains of responsibility.
Trusted Brands We Service in Montclair
We work with brands that make sense for Montclair’s housing stock: Master Halco and Barrette for fencing that holds up to Santa Ana gusts, and Ameristar or Jerith when a homeowner wants ornamental aluminum at a tighter budget point. Because we maintain active vendor relationships across all these lines, we can usually source materials for Montclair jobs on predictable timelines. When a fence fails after a wind event, we know what’s in local supplier stock, not just what a catalog shows.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Montclair Homes
- Undersized electrical panels. Most 1950s-1970s tract homes in the 91763 core still run on 100-amp service. Adding a kitchen island with new appliances or a full ADU almost always requires a panel upgrade, and a quote that omits it will balloon mid-project.
- Setback violations on detached garages. Original garages often sit within inches of the rear property line. An ADU conversion or addition becomes a survey and variance problem before it becomes a framing problem, and contractors who skip that step get stuck in permit delays.
- Wind-damaged roofing and stucco. Santa Ana events and the Pomona Valley’s hot, dry summers put thermal and wind load on envelopes. Repairs that lack documented wind-load engineering leave the structure vulnerable and can cause insurance claim denials.
- Aging galvanized plumbing. Original galvanized supply lines corrode from the inside, and by the time a homeowner notices low water pressure, whole sections need replacement. Any credible whole-home remodel in Montclair includes an honest look at the water supply and drain lines.
Pricing for General Contractor in Montclair, CA
Real numbers, not vague “it depends.” A garage conversion in Montclair runs $30,000 to $80,000. A home addition runs $45,000 to $130,000. Roof replacement runs $8,000 to $20,000, and ADU construction runs $90,000 to $220,000. What moves the needle: whether the project requires a setback variance, a panel upgrade, or wind-load engineering on the existing structure. A compliant quote includes those line items up front. A cheap one leaves them out and bills them as change orders later. Call (844) 384-3361 for a free estimate, and we’ll put the full scope in writing.
| Project Type | Montclair Price Range |
|---|---|
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Home Addition | $45,000 – $130,000 |
| Roof Replacement | $8,000 – $20,000 |
We Also Serve Cities Near Montclair
Our team works throughout the Pomona Valley and eastern San Gabriel foothills, including Montclair, Claremont, Ontario, Upland, and La Verne. If you’re in a neighboring city and planning a whole-home renovation or ADU, the same team and the same single-contract approach applies.
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
Roofs in Montclair must be engineered to meet the wind-load requirements of the California Building Code as adopted by the city, and because the Pomona Valley sees regular Santa Ana events, we spec roofing systems and attachment methods that exceed minimum code rather than just meeting it. GAF, CertainTeed, and Owens Corning products with documented wind ratings are our default for Montclair homes, and every roof replacement includes the engineering paperwork that proves the installation was compliant. Call (844) 384-3361 for a roof assessment and an exact quote.
Yes, both require permits and plan review, and in Montclair the bigger issue is usually the setback and survey work. Because original detached garages on postwar lots often sit within inches of the rear property line, a garage conversion or ADU frequently needs a variance before construction can start. We handle that paperwork as part of the contract, not as an afterthought. Call (844) 384-3361 and we’ll tell you where your property stands.
Documented compliance, meaning signed engineering, passed inspections, and a paper trail showing the work met current code, gives your insurer evidence that the structure is sound, and that can translate into better premium terms or smoother claim approval. We recently converted a detached garage into an ADU on a Montclair lot near the 91763 core, and the homeowner used our compliance package to secure a better insurance rate after final sign-off. We build that documentation into every project, not just the ones a homeowner asks for.
A compliant quote includes the survey, the setback analysis, wind-load engineering for the roof and any re-framed walls, the electrical panel upgrade if the original 100-amp service can’t carry the added load, and the permit and inspection fees. A cheap quote omits those line items and presents a lower number. We itemize everything from the start, which is why our room addition quotes in Montclair typically land between $45,000 and $130,000. Call (844) 384-3361 for a line-item estimate.
Because Montclair’s postwar tract homes were built on lots where the original detached garage often sits within inches of the rear property line, any ADU conversion or addition immediately becomes a setback-and-survey problem. If the survey shows the structure encroaches on the required rear or side setback, the city will require a variance before approving plans, and a contractor who didn’t plan for that will hit permit delays and change orders. We start with the survey, so the project timeline reflects reality from day one. Call (844) 384-3361 for a free estimate.
Written by Noel Figueroa, Owner at Workshop Contractors, serving Montclair and the Pomona Valley since day one.