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
Timberline Contractors has served Ontario since 2018 as a full-scope general contractor for home renovation, remodeling, and additions. Ontario’s housing stock runs heavy on 1940s-to-1970s stucco tract homes entering their second major remodeling cycle, and our work here runs from slab repairs and re-pipes to whole-home renos on the newer infill east of the 15. If you’re planning a kitchen, bath, addition, or exterior upgrade, call (866) 253-5808 and we’ll give you a straight answer on scope and price.
Home is where most Ontario homeowners start their research. We’d rather you start with what the house itself is telling you.
Why Ontario Homes Are Different
Most Ontario homes built between the 1940s and 1970s sit on flat, fast-draining alluvial ground with stucco over frame or plaster exteriors. Remodels in these ZIP codes repeatedly surface original aluminum wiring, thin clay sewer laterals, and exterior walls where drywall went straight over plaster with no sheathing behind it. That last one is a big deal: cutting into an old Ontario exterior wall without testing first can hit buried conduit or a plumbing run nobody mapped.
Climate matters too. Hot, dry Inland Empire summers with intense UV and occasional Santa Ana winds beat up stucco, roofing, and exterior paint faster than coastal contractors expect. Then the rare winter rain event arrives and exposes drainage and grading problems on the flat postwar lot grading that defines so much of this city. A good Ontario remodel plans for both: materials that hold up under UV, and a site drainage check before we start adding square footage or hardscape.
Add the warehouse-and-logistics buildout boom around the 10, 60, and 15 interchange, and “construction in Ontario” really means two different trades sharing the same ZIP codes: residential remodels in the old core, and heavy commercial tilt-up out by the airport. We do the residential side, and we build to the same standard the warehouse boys build their racking: square, plumb, and overbuilt.
Styles & brands we work with
Our Main Ontario Services
Two services carry most of our Ontario calls: full general-contractor management and whole-home remodeling. Here’s what each one looks like in this market.
General Contractor in Ontario
When an Ontario homeowner is staring at a remodel that touches structure, electrical, plumbing, and finishes, the smart move is one contractor who holds the whole schedule. We pull permits through the City of Ontario, coordinate every trade, and stand behind the work. Ontario’s older stucco homes hide surprises behind walls, and a general contractor who tests before cutting saves you from a change order. See General Contractor in Ontario for the full scope.
Home Remodeling in Ontario
Remodeling an Ontario home means working with what’s already there: mid-century framing, plaster-on-stucco walls, and floor plans laid out for a different kind of family. We open up kitchens, rework baths, add square footage, and upgrade exteriors without fighting the house. The UV and Santa Ana conditions here make exterior material choices matter more than homeowners expect. Get the details on Home Remodeling in Ontario.
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 updating a 50-to-80-year-old house without pretending it’s new construction. The flat lots, stucco exteriors, and aluminum wiring common in the 91761, 91762, and 91764 ZIP codes mean renovation here is as much about discovery as demolition. We make that discovery cheap: knuckle-test the walls, scope the sewer lateral, check the panel before we quote. Home Renovation is our core trade, and in Ontario it usually starts with a walkthrough where we tell you what the house is hiding and what it’s going to cost to fix.
Home Renovation Contractors
Signs you need it
Aluminum wiring that trips breakers, stucco cracking at the corners, and a floor plan that dead-ends every time you try to modernize the kitchen all point to a full renovation rather than a patch job.
What it costs in Ontario
A mid-century Ontario home renovation typically runs $45,000 to $130,000 depending on how much of the original plumbing and wiring you replace along the way.
How we do it
We scope the electrical and sewer first, then open walls, replace what’s failed, reframe for the new layout, and close it all back up with materials rated for inland UV and temperature swings.
Home Renovation Companies
Signs you need it
You’ve priced the job trade-by-trade and the bids don’t line up, or you’re looking at a renovation that touches structural framing, plumbing, and finish work at the same time.
What it costs in Ontario
Whole-home renovation with a single accountable contractor in Ontario typically falls between $45,000 and $130,000, with kitchens and baths driving the top end.
How we do it
We run the job as one schedule with one point of contact, sequencing demo, rough-in, insulation, drywall, and finishes so no trade waits on another and no homeowner plays dispatcher.
What Home Renovation Costs in Ontario
| Item | Typical range in Ontario |
|---|---|
| Whole-home renovation | $45,000 – $130,000 |
| Kitchen remodel | $14,000 – $45,000 |
| Bathroom remodel | $9,000 – $28,000 |
How long does a full home renovation take in Ontario?
Most full-home renovations in Ontario run 10 to 16 weeks from permit to final walkthrough. Older stucco homes with hidden wiring or sewer issues can push longer. Call (866) 253-5808 for a timeline based on your specific scope.
Will a home renovation in Ontario uncover problems that raise the price?
Yes, especially in 1950s and 1960s tract homes where aluminum wiring and old drain lines hide behind walls. That’s why we test and scope before we quote. Call (866) 253-5808 for a written estimate that accounts for what we can verify up front.
Brands We Service in Ontario
We install and service a deep bench of manufacturer-backed materials for Ontario jobs: Cambria and Silestone quartz for kitchens, Kohler and Toto for baths, James Hardie for siding, GAF and CertainTeed for roofing, and Unilock, Techo-Bloc, and Cambridge Pavers for driveways and patios. Parts and samples are stocked locally, so most material selections don’t add lead time. See our brands for the full roster.
See the difference
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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 |
| Bathroom Remodel | $9,000 – $28,000 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Roof Replacement | $8,000 – $20,000 |
| Window Replacement | $4,500 – $15,000 |
| Vinyl Fence Installation | $3,500 – $9,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
Prices in Ontario climb when the house is old enough to have aluminum wiring, thin sewer laterals, or stucco over plaster with no sheathing, because those conditions add labor to every cut and every connection. We quote fixed prices with a written line item list, so you’ll know the number before we start and it won’t move unless you change the scope.
Neighborhoods We Serve in Ontario
We work across Ontario’s residential core and the newer infill, from the older stucco tracts around the historic downtown to the subdivisions east of the 15. Response time across the city is typically same-week for estimates, and we’re already permitted and familiar with the City of Ontario’s building department.
- Historic downtown Ontario
- North Ontario (around 91764)
- East Ontario (east of the 15, 91761)
- South Ontario (around 91761 and 91762)
- West Ontario (toward the 60, 91758)
Service Area – Cities Near Ontario
Timberline Contractors also serves the surrounding Inland Empire communities. If you’re a few exits away, we’ll come to you with the same pricing and the same crew. See our pages for Montclair, CA, Upland, CA, Chino, CA, and San Antonio Heights, CA.
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
Most Ontario projects start within 2 to 4 weeks of a signed contract, depending on permit review times with the City of Ontario and material lead times. Custom cabinetry and some premium quartz colors can add a few weeks. Call (866) 253-5808 with your scope and we’ll give you a realistic start date.
Yes. We pull all required City of Ontario permits for structural, electrical, plumbing, and mechanical work, and we prepare submittal packages for HOA review when your neighborhood requires exterior-change approval. That’s part of the general contractor scope, not an add-on.
We cover 91758, 91761, 91762, and 91764, which includes the older stucco tract core, the newer infill east of the 15, and the warehouse-adjacent residential pockets. If your street isn’t listed here, call (866) 253-5808 and we’ll confirm coverage directly.
When you’re ready to talk numbers, call (866) 253-5808 to schedule a free estimate. We’ll walk the house, tell you what it needs, and give you a written line-item price before you commit to anything.
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
"Three other companies in Chinatown either didn't pick up or wanted to schedule me for the following week. These guys had someone out the next morning."
— Robert Sullivan"Ground up build. Permits, foundation, framing, all of it, and he ran the schedule tightly enough that the subs were never tripping over each other. Finished within a month of a fourteen month estimate."
— Ramon Reyes"Fast, fair, done right. No notes."
— Rana Saleh