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
Remodeling Company in Ontario, CA
Full-scope home renovation in Ontario means dealing with two very different housing stocks. The mid-century tract homes near downtown and Euclid Avenue were built from the 1950s through the 1970s and often carry original plumbing, electrical, and foundation work. The new master-planned communities at Ontario Ranch bring their own realities: former dairy land, expansive clay soil, and HOA design review on nearly every exterior change. Square One Builders has served Ontario since 2014, and we run both kinds of projects from the ground up under one contract, so you’re not coordinating a kitchen contractor, a roofer, and a window crew separately. Call (877) 688-9930 to talk through what your Ontario home needs.
Why Ontario Homes Are Different
Ontario’s housing stock splits along a clear line. The older core, roughly the 91761 and 91762 ZIP codes, features mid-century tract homes that developers built quickly during the postwar boom. Many of those houses still have their original cast-iron drain lines, 60-amp electrical panels, and single-pane aluminum windows that leak conditioned air straight into the Inland Empire heat. When we open walls in those homes, we expect to find galvanized supply lines and footing issues driven by the region’s expansive clay soil, which swells and shrinks through wet winters and scorching summers.
South of the 60, Ontario Ranch is a different world. That land was dairy and agricultural property for generations, and builders now work through old buried irrigation lines, manure-impacted soils, and grading challenges that don’t appear in the city’s older neighborhoods. The new product there is largely production single-family and townhome builds with Title 24 energy requirements and HOA-driven design review on everything from roof color to fence style. A renovation in Ontario Ranch often means matching new-construction standards, while a remodel near Euclid Avenue is more about retrofit and structural correction. Santa Ana winds push hard on roofs and fencing citywide, and the hot, dry summers make reflective roofing and proper window selection a genuine cost decision, not a style preference.
Styles & brands we work with
Our Main Ontario Services
The two calls we get most often from Ontario homeowners are for whole-project general contracting and for full home remodels. Here’s what each involves here.
General Contractor in Ontario
When an Ontario project spans more than one trade, a general contractor becomes the single point of accountability. That’s especially true on the city’s older homes, where a kitchen remodel regularly uncovers electrical and plumbing work that was never on the original scope. In Ontario Ranch, the GC role shifts toward managing HOA submittals, energy code compliance, and coordinating production-grade materials with tighter lot lines and newer construction tolerances. Square One Builders runs both scenarios with one contract and one schedule. General Contractor in Ontario covers how we approach full-scope projects here, what a realistic timeline looks like, and where Ontario’s permitting process tends to add time.
Home Remodeling in Ontario
A full home remodel in Ontario usually starts with one room and expands once the walls come down. That’s not a sales tactic; it’s what the housing stock reveals. Mid-century homes hide outdated wiring, and Ontario Ranch builds sometimes show production shortcuts that a quality remodel corrects. The local climate matters too: a remodel that doesn’t address window efficiency or attic insulation will cost more to cool every summer after the work is done. We spec materials that handle Inland Empire heat and HOA requirements without forcing you into a brand you don’t want. Home Remodeling in Ontario walks through whole-home scope, typical Ontario surprises, and how we keep one team accountable across every phase.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Home Renovation in Ontario
Home renovation in Ontario means planning for what’s behind the walls before the first hammer swings. The older homes near Euclid Avenue and downtown often need electrical service upgrades, drain line replacement, and foundation attention before finish work makes sense. In Ontario Ranch, renovation is more about correcting production-build shortcuts and upgrading to materials that hold up through Santa Ana wind seasons and triple-digit summer weeks. Home Renovation is the service hub for how we scope and run these projects, but here’s the Ontario-specific picture, including what most of these jobs actually cost.
Home Renovation Contractors
Signs you need it
You’re planning a project that touches more than one trade and you don’t want to hire and schedule a separate electrician, plumber, drywall crew, and finish carpenter on your own.
What it costs in Ontario
Full home renovation projects in Ontario typically run between $14,000 and $45,000 depending on scope, with smaller kitchen-focused renovations starting around $9,000.
How we do it
We start with a structural and systems walkthrough of your home, then line-item the entire job so every trade, permit, and material choice is documented before work starts.
Home Renovators
Signs you need it
Your Ontario home was built before current energy and building codes, and you want the renovation to address insulation, electrical capacity, and window performance, not just finishes.
What it costs in Ontario
A whole-home renovation that includes systems upgrades in Ontario generally falls between $14,000 and $45,000, while single-room renovations run from about $5,000 to $28,000 depending on the room.
How we do it
We sequence the work so structural and mechanical upgrades happen first, then inspections, then finishes, keeping the project moving without redoing completed work.
What Home Renovation Costs in Ontario
| Item | Typical range in Ontario |
|---|---|
| Kitchen remodel | $14,000 – $45,000 |
| Bathroom remodel | $9,000 – $28,000 |
| Countertop installation | $2,000 – $6,500 |
How long does a home renovation take in Ontario?
A single-room renovation in Ontario typically takes four to eight weeks once permits are issued. Whole-home jobs run three to six months. Ontario’s permit review timeline adds two to four weeks, and Ontario Ranch HOA submittals can add another two weeks before work starts.
Will my renovation price change once work starts in Ontario?
It can if we open walls and find conditions the original scope didn’t cover, which happens regularly in Ontario’s 1950s and 60s stock. That’s why we write line-item scopes with a defined process for change orders. Call (877) 688-9930 for a scope review.
Brands We Service in Ontario
We source from 50+ material brands so an Ontario project isn’t limited to whatever one supplier has in stock. For ADU and prefab work, we’re authorized to work with Abodu, Dvele, and Mighty Buildings. Our brands page shows the full range.
See the difference
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After
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AfterPricing for Remodeling Company in Ontario, CA
| Service | Typical range in Ontario |
|---|---|
| Kitchen remodel | $14,000 – $45,000 |
| Small kitchen remodel | $9,000 – $20,000 |
| Cabinet installation | $4,000 – $13,000 |
| Countertop installation | $2,000 – $6,500 |
| Backsplash installation | $800 – $2,500 |
| Kitchen island installation | $3,000 – $10,000 |
| Bathroom remodel | $9,000 – $28,000 |
| Walk-in shower installation | $4,500 – $12,000 |
| Tub-to-shower conversion | $3,500 – $10,000 |
| Paver driveway installation | $7,000 – $18,000 |
| Roof replacement | $8,000 – $20,000 |
| Window replacement | $4,500 – $15,000 |
Ontario pricing shifts with two local factors. Homes in the older core often need structural or systems corrections before finish work can start, which adds to scope. Ontario Ranch jobs can run higher on exterior work because HOA design review often requires specific material grades or colors. We quote fixed, line-item pricing before work begins, and we don’t run change orders without your written sign-off.
Neighborhoods We Serve in Ontario
We work across all four Ontario ZIP codes, from the older neighborhoods around Euclid Avenue and the historic core to the new Ontario Ranch master-planned communities. Our crews stage from Corona and cover the city daily.
- Downtown Ontario (91761)
- Euclid Avenue corridor (91762)
- Ontario Ranch (91764)
- North Ontario (91758)
Service Area – Cities Near Ontario
Square One Builders works throughout the western Inland Empire. In addition to Ontario, we serve Montclair, CA, Upland, CA, Chino, CA, and San Antonio Heights, CA. Call (877) 688-9930 to confirm coverage for your address.
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 Remodeling Company in Ontario
Yes. We pull all required permits through the City of Ontario building department and schedule inspections as part of the project. For Ontario Ranch properties, we also handle HOA submittals and design review coordination so your contractor and association work from the same plan.
Our Ontario schedule typically books two to four weeks out for a new project start, depending on scope and current project load. Permit approval and HOA review, when required, add time after we begin. Call (877) 688-9930 and we’ll give you a current start window for your specific job.
Yes, we work regularly in Ontario Ranch and handle the HOA design review process. We submit material specs, colors, and project drawings to the association early so the work you approve is the work that gets built. That step avoids redoing finished work over a rejected paint color or fence style.
Planning a renovation in Ontario? Call (877) 688-9930 to schedule a free estimate and get a straight answer on scope, timeline, and cost for your home.
What happens when you call
- 1A real person answersNo phone trees — talk to a local construction pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Ontario Customers Say
"Allowances in the contract were realistic rather than artificially low to make the bid look good."
— Colleen Bennett"The foundation survey came back dead on. Everything downstream of that being square is the reason the rest of the build went smoothly."
— Claudia Torres"Quality construction and a professional operation. Communication was strongest at the site meetings, and slower by email in between."
— Leela Singh