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 Ontario
Home remodeling in Ontario, CA means working around a housing market split between 1950s tract homes near Euclid Avenue and brand-new builds rolling out across Ontario Ranch. Most of our Ontario clients ask one question first: which builder-grade finishes are worth replacing, and what will it cost. A kitchen remodel here typically runs $14,000 – $45,000, while a focused bathroom update lands between $9,000 and $28,000. Call (877) 688-9930 and we’ll walk your house with you before you spend a dollar.
We’re a licensed general contractor based in Westminster, and we run crews throughout the Inland Empire every week. Ontario is not a side market for us. We know the 91761 and 91762 ZIP codes, the HOA submittal process at Ontario Ranch, and the mid-century floor plans near downtown that hide plumbing surprises behind every wall.
Why Square One Builders Is Ontario’s Preferred Home Remodeling Company
Homeowners in Ontario keep calling us for one reason: we handle every trade under one contract. When a remodel touches framing, plumbing, windows, and countertops, the last thing you want is four separate crews pointing fingers. We run the whole job from the ground up, with a single person accountable for schedule, material orders, and the inspection sign-off.
Brent Calloway leads every estimate and walks the site personally before we submit pricing. That matters on Ontario Ranch jobs, where the HOA design review process can stall a project for 30 days if the submittal isn’t done right. We file the architectural package with the management company, handle the exterior color and window style details, and get the approval before demo starts.
Our Ontario clients regularly mention the same three things in reviews: we answer the phone, we show up when we say we will, and the final invoice matches the written quote. We carry general liability and workers’ comp, and we pull permits on every structural, electrical, or plumbing job in Ontario. No exceptions to that.
Styles & brands we work with
Luxury Home Remodeling in Ontario
Luxury Home Remodeling in Ontario’s newer master-planned communities means something different than a cosmetic refresh. It is a full-gut rebuild of a kitchen or primary bath using materials that outclass the builder’s spec sheet: Cambria quartz instead of laminate, custom cabinetry instead of stock boxes, Kohler fixtures instead of the contractor-grade package that came with the house.
In Ontario, this type of project usually starts when homeowners realize the builder finishes are fine for five years but not for ten. The laminate countertop chips. The particle-board vanity swells where water pools. The walk-in closet light is on a single switch. A luxury remodel addresses the layout, the materials, and the mechanical rough-ins all at once. We spec each material intentionally, from the cabinet line to the shower valve trim.
Kitchen Upgrades That Hold Resale Value
In Ontario Ranch neighborhoods, the resale conversation is real. A kitchen remodel at $25,000 – $45,000 should buy you plywood-box cabinets, quartz or solid surface countertops, under-cabinet lighting, and a vented hood. Skip the back-painted glass and the waterfall island edge if the house is under 2,200 square feet; that money does not come back here.
Primary Bath Remodels Without Builder-Grade Corners
A luxury primary bath in Ontario usually includes a curbless shower, a freestanding tub, and a double vanity with at least 72 inches of counter. Budget $18,000 – $28,000 for a full primary bath when you are moving drains or changing the footprint. We document every change order in writing before cutting drywall, so the final number is never a surprise.
Full Home Remodel in Ontario
A Full Home Remodel in Ontario usually targets the original-condition mid-century homes in 91761 and 91762. These houses were built between 1955 and 1975, and most still have their original cast-iron drain lines, single-pane windows, and 60-amp panels. Remodeling one properly means opening walls, updating the electrical service, and re-plumbing the wet walls before finish work begins.
We price these projects by system, not by square foot alone. A whole-house update on a 1,400-square-foot Ontario home might run $60,000 – $90,000 when it includes a kitchen, two baths, flooring, lighting, and new windows. That is honest math for this market. Trying to do it for half that will leave you with Sheetrock seams cracking above doorways by the first Santa Ana season.
Windows, Doors, and Envelope Work
Single-pane aluminum windows are a liability in Ontario summers when daytime highs sit in the 90s for weeks. Replacing them with Title 24-compliant dual-pane units cuts cooling load and quiets the warehouse truck traffic that rumbles up Euclid. We source windows through our Home Remodeling team and coordinate the stucco patch and interior trim so the envelope work happens before the paint crew arrives.
Room Additions and Structural Scope
Adding a bedroom or home office in Ontario often triggers foundation work, and that is where the former dairy land matters. The expansive clay soils under much of Ontario Ranch move with the seasons. We have pulled permits for additions where the geotechnical report required deeper footings than the original slab. That is not a line item to skip.
Trusted Brands We Service in Ontario
We install and service materials from CertainTeed, Owens Corning, and IKO across our Ontario roofing and exterior projects. If you are planning a roof replacement alongside an interior remodel, we stock Ridge Vent and shingle components specific to these product lines so lead times stay short. The brand portfolio matters because it gives you choice without switching contractors. We spec the right material for your project, whether that means CertainTeed Landmark shingles for a cost-conscious roof or Owens Corning Duration for a steeper pitch with higher wind exposure. Our crews are trained on the installation specs for each manufacturer, which keeps the product warranty intact.
See the difference
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After
Before
After
Before
AfterCommon Home Remodeling Problems We See in Ontario Homes
- Builder-grade cabinets failing early in Ontario Ranch homes: The drawer glides on entry-level KraftMaid or stock builder boxes start binding within three to five years. Homeowners ask us to replace the boxes while keeping the layout, which runs $4,000 – $13,000 depending on cabinet count and finish.
- Drain rough-ins off by an inch or two on tract builds: Production plumbers work fast. On a 2019 Ontario Ranch primary bath, our crew found the shower drain rough-in 2 inches out of position relative to the new Kohler shower pan. We caught it before any demo and wrote the change order before touching the floor.
- Expansive clay soils stressing slabs and patios: Ontario’s soil moves. Cracks in garage floors, lifted paver edges, and drywall separation at ceiling corners are the visible signs. Any addition or patio job needs a soil conversation before concrete goes down.
- HOA design review rejecting exterior changes after work starts: In master-planned communities, paint color, window style, and patio cover changes all need architectural committee approval. We file that package before the first dumpster arrives.
Pricing for Home Remodeling in Ontario, CA
Ontario pricing runs slightly above national averages because of local permit fees, HOA submittal costs, and the soil challenges on former agricultural land. Here is what we quote across the city:
| Project | Typical Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Walk-In Shower Installation | $4,500 – $12,000 |
Material choice moves these numbers more than anything else. Quartz runs higher than laminate; a custom vanity costs more than a stock 48-inch box. We give you written line-item pricing before you sign, and the price on that sheet is the price we build to. Call (877) 688-9930 to schedule a free walkthrough estimate. It takes about 90 minutes on site, and you keep the written scope and allowance sheet whether you hire us or not.
We Also Serve Cities Near Ontario
Square One Builders runs crews throughout the 91758, 91761, 91762, and 91764 ZIP codes, plus the surrounding communities. We handle full-scope Home Remodeling in Ontario and adjoining cities including Montclair, Upland, Chino, and San Antonio Heights. If your project is just over the city line, the same crew and the same pricing discipline apply. One contractor, every system, across the whole Inland Empire corridor.
Serving Ontario, CA — Our Local Coverage Area
We’re based in the Ontario 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 Ontario
Start with the kitchen counters and cabinet hardware, then the primary bath shower. In Ontario Ranch homes under seven years old, the layout is usually sound but the surfaces are builder-grade. Countertop replacement runs $2,000 – $6,500, and converting a tub to a walk-in shower with new Kohler or Moen trim lands at $3,500 – $10,000. These two projects improve daily life immediately and hold value when resale comes. Call (877) 688-9930 and we will tell you what is worth doing to your specific floor plan.
You protect the warranty by getting written approval from the production builder before touching any load-bearing wall, electrical run, or plumbing rough-in. In Ontario Ranch, the builder warranties structural and mechanical work for up to 10 years, but they will void it if a third party modifies those systems without sign-off. We coordinate directly with the builder’s warranty department and document everything in writing before demo starts.
Most Ontario Ranch HOAs require architectural committee approval for exterior color changes, window style alterations, patio covers, and any structure visible from the street. Interior work like kitchens and baths usually only needs a permit, not HOA review, but exterior vent terminations and window trim colors do. We file the submittal package with the management company before construction begins, so you are never chasing an approval mid-project.
Because much of Ontario Ranch and the south side was dairy and agricultural land before the tract builders arrived. Remodelers digging for additions, paver patios, or new foundation footings regularly hit buried concrete from old barn foundations, manure-impacted soils, and old drainage tiles that never made it onto any map. This does not happen on the older lots near Euclid Avenue. On a recent addition, we hit an old silage pit foundation 18 inches below grade and had to bring in a soil engineer before the footing inspection. That is the kind of line item you want to know about before the backhoe shows up.
A standard guest or hall bath remodel in Ontario runs $9,000 – $15,000 when you keep the footprint and update the tub, toilet, vanity, tile, and fixtures. A primary bath with a walk-in shower and moved drains starts around $18,000. We quote exact numbers after a site walk, never a phone guess. Call (877) 688-9930 for a free estimate on your specific bath.
Written by Brent Calloway, Owner at Square One Builders, serving Ontario and the surrounding Inland Empire since 2018.