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
Home renovation in Ontario, CA means working on houses built between 1950 and 1975: stucco exteriors, slab foundations, galvanized pipes, and roofs that have baked under Inland Empire sun for fifty-plus years. Key Step Construction has served Ontario since 2017, and we plan every job around what these specific homes actually need, not a generic remodel script. From re-piping a 1962 ranch in the 91762 ZIP to gutting a kitchen in a 1970s tract home off Euclid Avenue, the work starts with the house as it is. Call (855) 382-0824 to talk through your project.
Why Ontario Homes Are Different
Ontario sits squarely in the Inland Empire’s post-war tract-home boom. Thousands of 1950s and 1960s stucco-on-slab houses were built fast, and they are now hitting the age where major systems need attention: original galvanized plumbing, aging electrical panels, and roofs that have taken decades of direct inland sun. This is not a new-build market. Local construction demand runs toward re-pipe, re-roof, seismic retrofit, and full-system renovation of aging subdivision stock.
Many slab-on-grade homes from this era have no anchor bolting or cripple-wall bracing at the garage-to-house connection. We see that soft-story failure point repeatedly when opening walls on Ontario remodels. The dry, hot summers and periodic Santa Ana wind events also stress stucco, roofing, and exterior paint far harder than in coastal cities. Concrete cures differently here too. A remodel plan written for a beach city would be wrong for Ontario, and we plan accordingly, down to material choices and scheduling around heat.
Styles & brands we work with
- Kitchen remodeling
- Bathroom remodeling
- Home additions & ADU
- Roofing
- Windows & doors
- Driveway & pavers
- Fence
Our Main Ontario Services
Most Ontario homeowners reach out to us for two scopes: full general contracting across multiple trades, and whole-home remodeling that ties interior and exterior work under one contract. Here is how each works in this city.
General Contractor in Ontario
When a project spans roofing, siding, windows, and interior work, a single accountable contractor matters. That is especially true on Ontario’s older tract homes, where opening one system often reveals issues in another. General Contractor in Ontario covers how we sequence multi-trade work, handle permits with the City of Ontario, and keep one contract and one schedule from demo through final inspection.
Home Remodeling in Ontario
A mid-century Ontario home rarely remodels cleanly. Galvanized supply lines, undersized electrical panels, and slab foundation quirks show up once walls come down. Home Remodeling in Ontario explains how we plan remodels around what these homes actually contain, including material choices that hold up to the heat and the seismic realities of the area.
Home Renovation in Ontario
Home renovation in Ontario is a different animal from renovation in newer or coastal markets. The houses are aging subdivision stock, the climate taxes exteriors, and the original plumbing and electrical systems are often at the end of their service life. That means a renovation plan here has to account for what is inside the walls, not just what the finish looks like. Key Step Construction approaches every Ontario renovation as a full-system project, because in these homes, the systems are the variable that decides whether the finished work holds up. One contractor, every system. You can read more about our approach on the Home Renovation page.
Home Renovation Contractors
Signs you need it
Your Ontario home is showing its age in multiple systems at once: corroded galvanized pipes, an overloaded electrical panel, failing roof, or a kitchen and bath that still carry their original 1960s layout.
What it costs in Ontario
Full home renovation contracting in Ontario typically runs $14,000 to $45,000 for a kitchen and $9,000 to $28,000 for a bathroom, depending on how much system work the house needs.
How we do it
We open the walls first, document what is actually there, then build the renovation order around the systems that need replacement before finishes go in.
Home Renovators
Signs you need it
You are planning a renovation that touches structure, plumbing, electrical, and finish work, and you do not want to manage four separate trades and their schedules yourself.
What it costs in Ontario
A renovation-heavy kitchen remodel in Ontario ranges from $14,000 to $45,000, while a full bathroom rebuild runs $9,000 to $28,000.
How we do it
We act as the single accountable renovator across the whole scope, sequencing trade work, pulling City of Ontario permits, and running the schedule through final inspection.
Home Improvement Contractors
Signs you need it
Your home needs a mix of upgrades: new countertops, a backsplash, a vanity, or a walk-in shower, and you want one contract instead of a binder full of separate bids.
What it costs in Ontario
Countertop installation in Ontario runs $2,000 to $6,500, backsplash $800 to $2,500, and a bathroom vanity $800 to $3,000.
How we do it
We scope the improvement set, order materials through our vetted brand lines, and run the work under one schedule with one point of accountability.
Home Renovation Companies
Signs you need it
You are comparing renovation companies and want one that can actually quote a complete scope, not hand off parts of the job to whoever is available.
What it costs in Ontario
Whole-home renovation projects in Ontario typically fall between $45,000 and $130,000, depending on square footage and how much of the original plumbing and electrical must be replaced.
How we do it
We walk the house top to bottom, build a line-item scope that includes the systems work these Ontario homes actually need, and put it in one written quote before work starts.
Renovation Contractors
Signs you need it
Your renovation scope crosses three or more trades, and you need a contractor who can hold the schedule when one trade’s delay ripples into the next.
What it costs in Ontario
Renovation contractor work on an Ontario kitchen runs $14,000 to $45,000, and a full bathroom rebuild ranges $9,000 to $28,000.
How we do it
We run the trade sequence from demolition to trim, with our own schedule and our own accountability, so a delay in one trade does not stall the whole project.
What Home Renovation Costs in Ontario
| Item | Typical range in Ontario |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
How much does a home renovation cost in Ontario?
A kitchen remodel in Ontario runs $14,000 to $45,000 and a bathroom $9,000 to $28,000. Whole-home renovations typically land between $45,000 and $130,000, driven by the age of the home’s plumbing, electrical, and structural systems. Call (855) 382-0824 for a line-item quote.
Will the price change once work starts on my Ontario renovation?
No, not on our watch. We write fixed line-item quotes after opening walls and documenting what is actually in your Ontario home, so the price you approve is the price you pay, absent a change you request. Call (855) 382-0824 to schedule a walkthrough.
Brands We Service in Ontario
We install and service Toto, Schluter, Sterling, and Grohe across Ontario projects, and we keep common finish and trim parts in local rotation for faster replacement work. Our brands page shows the full catalog we work from. Most in-stock parts arrive within a week; special-order trim can take two to three weeks depending on the line.
See the difference
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After
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After
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AfterPricing for Remodeling Company in Ontario, CA
| Service | Typical range in Ontario |
|---|---|
| Bathroom Remodel | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Shower Replacement | $3,000 – $8,500 |
| Countertop Installation | $2,000 – $6,500 |
| Backsplash Installation | $800 – $2,500 |
| Kitchen Island Installation | $3,000 – $10,000 |
| Window Replacement | $4,500 – $15,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Vinyl Fence Installation | $3,500 – $9,000 |
| Garage Conversion | $30,000 – $80,000 |
What pushes a price up in Ontario is the house itself: galvanized supply lines that have to come out, electrical panels that cannot carry a modern kitchen, or a slab foundation that needs cutting for new drain lines. We quote those conditions as line items before work starts, not as surprise change orders. Your written estimate is fixed, and it covers the whole scope, permits included where required.
Neighborhoods We Serve in Ontario
We work across Ontario’s residential neighborhoods, from the older pre-war streets near downtown to the mid-century tracts and newer infill in the 91761 and 91762 ZIP areas. Each pocket has its own housing era and its own set of recurring problems.
- Downtown Ontario
- North Ontario
- South Ontario
- East Ontario
- Ontario Ranch area
We typically reach most Ontario neighborhoods from Buena Park within 45 to 60 minutes, which puts us on-site quickly for walkthroughs and estimates.
Service Area – Cities Near Ontario
Key Step Construction serves Ontario and the surrounding Inland Empire cities. If your home is in a neighboring community, we cover those too: Montclair, CA, Upland, CA, Chino, CA, and San Antonio Heights, CA. The same fixed-quote, full-scope approach applies across the whole service area.
Serving Ontario, CA - Our Local Coverage Area
We serve Ontario and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs About Remodeling Company in Ontario
Once the scope is approved and permits are pulled, we typically start within two to four weeks, depending on City of Ontario permit turnaround and material lead times. For a specific start window on your project, call (855) 382-0824 and we will give you a straight answer.
Yes. We pull the permits, schedule inspections, and manage the paperwork for every Ontario project, including structural, plumbing, electrical, and ADU scopes. The permit process is part of the fixed quote, not a separate surprise.
We serve all Ontario ZIP codes: 91758, 91761, 91762, and 91764. From downtown to the newer infill, the service area is the same, and estimates are free regardless of neighborhood. Call (855) 382-0824 to schedule yours.
If you own one of Ontario’s mid-century tract homes and you are planning a renovation, start with a walkthrough with someone who knows what is inside these walls. Call Key Step Construction at (855) 382-0824 to schedule your free estimate. One contractor. Every system. Plan it once, build it right.
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
"Framing crew was meticulous and the walls are straight everywhere. Drywall goes on a lot better when the framing is right."
- Emily Thompson"Allowances in the contract were realistic rather than artificially low to make the bid look good."
- Dale Schaefer"Excellent build. Costs came in about six percent over the original contract, driven mostly by material price movement during the build, which he documented each time."
- Luis Morales