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 Home Remodeling Across Montclair
Home remodeling in Montclair, CA sits at an interesting crossroads for PGT in Montclair. Montclair is a city of roughly 1.1 square miles in San Bernardino County, folded between Pomona, Claremont, Upland, and Chino, and there is almost no vacant land left inside the 91763 ZIP. That means nearly every project we take on here is an infill remodel, addition, or ADU on a narrow 1950s to 1970s lot. We know exactly what that requires at the Montclair permit counter, from zero-lot-line setbacks to alley access questions. If you’re weighing a whole house remodel or even a single-room update, call us at (877) 688-9930 and we’ll walk you through what a compliant project actually looks like here.

Why Square One Builders Is Montclair’s Preferred Home Remodeling Company
Square One Builders has spent years working inside Montclair’s unique housing stock: single-story stucco tract homes on small lots, many with original galvanized supply plumbing, aging electrical panels, and shallow slab-on-grade foundations. That’s a different animal from new construction, and it’s why we approach every Montclair remodel from the ground up, with one contractor accountable for every system. Brent Calloway founded this company on a simple idea: homeowners shouldn’t have to coordinate five separate trades and hope the pieces line up.
Montclair homeowners tell us the same thing over and over: they thought a kitchen remodel was cosmetic, then someone opened a wall and found 60-amp panels and corroded pipe. We’re not surprised. We’re prepared. Our Home Remodeling team has seen every phase of a 1950s tract home project, and we spec materials accordingly, from James Hardie siding to Kohler and Moen fixtures, to Owens Corning and CertainTeed roofing. When you work with us, your remodel in Montclair is fully managed, from the first permit pull to the final inspection sign-off. Call (877) 688-9930 to talk through your scope.
Styles & brands we work with







Home Remodeling Companies in Montclair
Home Remodeling Companies in Montclair operate in a tight market where permit-counter competency separates the real general contractors from the guys who quote cheap and disappear when the inspector shows up. A full-scope remodel here means structural framing, plumbing and panel upgrades, roofing, windows, finishes, and often exterior work across one contract. Most Montclair kitchens we quote run $14,000 to $45,000. Bathrooms land between $9,000 and $28,000. A home addition on one of these narrow 1950s lots typically ranges from $45,000 to $130,000 because of the engineering and setback work involved.
Permit and Code Coordination
Any remodel in Montclair that touches bearing walls, electrical service, plumbing drains, or roof structure needs a permit, and the Montclair counter expects load calculations, framing plans, and energy compliance documentation before they’ll sign off. We handle that entire process for you, keeping a written change-order file so nothing drifts from the approved scope.
Infill and Tight-Lot Logistics
Because Montclair is landlocked, almost all work is infill on small lots. That changes staging, alley access, dumpster placement, and even delivery scheduling. A contractor who mostly works greenfield subdivisions in Chino or Ontario will struggle with a 50-foot-wide Montclair lot. We plan for it from day one.
Whole House Remodel in Montclair
A whole house remodel in Montclair follows a different logic than a single-room renovation. With homes built between the 1950s and 1970s, you’re almost always dealing with original galvanized supply lines, outdated panels, and framing that predates current seismic code. We open walls expecting that. The job typically runs from gut-and-reframe through all mechanicals, insulation, drywall, flooring, cabinetry, countertops, fixtures, windows, and exterior work where needed. On a 1950s stucco tract home near the Pomona border, our crew removed a load-bearing wall and found exactly what we anticipated: galvanized supply lines and a 60-amp panel that had to be upgraded before we could rough-in the new kitchen. We pulled permits through the Montclair counter, coordinated the structural and electrical inspections, and kept a clean change-order file the homeowner later used for an insurance claim after a Santa Ana wind event damaged the roof edge.
Seismic and Wind-Load Upgrades
Montclair sits at the foot of the San Gabriel Mountains, which means two things for remodels: hot inland summers that hit 90-plus degrees during concrete and stucco cure windows, and Santa Ana wind events that put real pressure on roof edges and exterior finishes. A whole house remodel here should include shear wall upgrades, roof edge detailing, and window and door selections that meet current wind-load requirements. We spec products that carry those ratings, and we document compliance in writing so your file stays clean.
Galvanized Plumbing and Panel Replacement
Almost every 1950s or 1960s Montclair home we open has galvanized pipe somewhere in the system. Waiting until rough-in to discover that is how budgets blow apart. We inspect and scope that work up front, so your whole house remodel quote reflects reality, not a guess.

Trusted Brands We Service in Montclair
We bring access to 50-plus nationally recognized material brands across every system of your remodel, and we stock local parts for Montclair projects to keep turnaround tight. On the roofing side, we work with CertainTeed and Owens Corning, two of the largest U.S. manufacturers, and we can spec GAF, IKO, or Atlas when the job calls for a different price tier or wind-load rating. For kitchen and bath work, that means Cambria and Silestone countertops, KraftMaid cabinetry, and Kohler or Moen fixtures, all under one contract. We spec the right material for your project, not whatever is left in someone’s warehouse. Call (877) 688-9930 and we’ll walk you through brand options at your price point.
See the difference
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After
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AfterCommon Home Remodeling Problems We See in Montclair Homes
- Unpermitted load-bearing wall removals. A homeowner wants an open floor plan, so someone pulls a wall without filing at the Montclair counter. Later, wind or seismic damage triggers an insurance claim, and the insurer denies it because there’s no permit record. We won’t do that work without the paperwork, and we’ll explain why it protects you.
- Santa Ana wind-load failures on exterior work. Quoting stucco or roofing without accounting for Montclair’s wind exposure leads to cracked finishes and failed inspections. We spec and install to rated products, then document it.
- Galvanized plumbing surprises at rough-in. The original 1950s supply lines are still in the wall until someone cuts into it. We inspect early and put the replacement cost in the initial quote, not a mid-project change order.
- 60-amp panel limitations. Modern kitchens, bathrooms, and especially ADUs demand more electrical service than a 60-amp panel can supply. Upgrading to 200-amp is a common scope item on Montclair remodels, and it has to be permitted and inspected.
Pricing for Home Remodeling in Montclair, CA
Remodel pricing in Montclair tracks with older housing stock and tighter lots. A full kitchen typically runs $14,000 to $45,000. A bathroom remodel lands between $9,000 and $28,000. Whole house remodels range widely, but most land in the $100,000 to $300,000 range. Here is the line-item breakdown we quote most often across the 91763 ZIP:
| Montclair Remodel Project | Typical Price Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| 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 |
What moves the number is what’s behind the walls. A 1950s tract home with galvanized pipe, a 60-amp panel, and original framing will cost more than a cosmetic refresh. We quote that work up front. Call (877) 688-9930 for a free estimate, and we’ll give you a written line-item scope, not a ballpark.
We Also Serve Cities Near Montclair
Montclair sits at a boundary where San Bernardino and Los Angeles County lines blur. We also handle full-scope remodels in Claremont, Ontario, Upland, and La Verne, including the same older tract housing stock and the same wind and seismic considerations that drive Home Remodeling in Montclair. Trades and materials cross those borders constantly, so we’re already familiar with the inspectors and the permit expectations in each neighboring city.
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 Home Remodeling in Montclair
Roofing in Montclair must meet current California Building Code wind-load requirements for the San Bernardino County foothill zone. That typically means rated underlayment, proper edge metal, and manufacturer-specified nailing patterns for the roof’s exposure. A compliant quote includes the product rating documentation and the inspection sign-off from the Montclair building department. Call (877) 688-9930 and we’ll tell you what your specific roof needs.
Yes. Any load-bearing wall removal in Montclair requires a structural permit, engineer-stamped plans, and an inspection sign-off from the city. Skipping that step is how homeowners end up with insurance claim denials later. We handle the full permit package as part of the remodel scope, so there’s no gamble on the back end.
Documented permit compliance gives your insurer a verifiable record that structural, electrical, and wind-load work is done to code. After a Santa Ana event or seismic claim, that file is the difference between a paid claim and a denial. We document every change order, every inspection sign-off, and every product rating so you can hand the insurer a complete file. Call (877) 688-9930 if you want a remodel that protects the claim as much as the house.
A compliant quote should include the real scope behind the walls: galvanized pipe replacement, panel upgrade to 200-amp service, shear wall and seismic framing upgrades, and any zero-lot-line setback adjustments required on narrow lots. If a quote only covers finishes, you’re going to get hit with change orders at rough-in. We price the real job from the start, and estimates are free at (877) 688-9930.
Yes, and Montclair’s status as a built-out city means ADU infill is one of the only ways to add square footage. California’s SB 9 and SB 423 laws allow lot splits and ADU construction in the 91763 ZIP, though narrow 1950s lots often trigger setback and alley-access review at the Montclair counter. We’re authorized to work with prefab partners like Abodu, Dvele, Boxabl, Mighty Buildings, and Plant Prefab, and we handle the full permit and site work scope. A typical ADU in Montclair runs $90,000 to $220,000, depending on size and site conditions. Call (877) 688-9930 for a site evaluation.
Written by Brent Calloway, Owner at Square One Builders, serving Montclair since the company’s founding.