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 runs $9,000 to $130,000 depending on scope, with kitchens at $14,000 – $45,000 and bath remodels at $9,000 – $28,000. What makes Ontario projects distinct is the housing stock: thousands of 1940s – 1970s single-story stucco tract homes on generous lots, many with original plumbing and shallow slab foundations that complicate any addition or structural change. Milpitas Construction has served Ontario since 2018, and we plan every renovation around the realities of this older inventory, the summer heat that pushes past 100°F, and the Santa Ana winds that stress exteriors every fall. Call (877) 752-4194 for a free estimate on your Ontario renovation.
Why Ontario Homes Are Different
Ontario sits in the heart of the Inland Valley, where the dominant construction story is infill: replacing postwar citrus-grove tract homes and aging 1950s – 70s single-story stock with new two-story builds, room additions, and ADUs under California’s SB 9 and ADU laws. Unlike coastal LA or Orange County cities, Ontario still has developable land and loose lot sizes, so contractors here work a mix of teardown-and-rebuild, additions, and garage conversions rather than pure remodels of tight urban lots.
That older stock carries specific conditions. Large swaths of Ontario were built as post-WWII working-class tract housing, which means drywall-and-lath plaster walls, original galvanized or early copper plumbing, and shallow slab foundations. When we tie a new addition into one of these homes, the structural detailing matters: the existing slab was never engineered for today’s Title 24 seismic and energy standards, so the connection point has to be done correctly. The climate adds another layer. Summers past 100°F push demand for ventilation, insulation, and shade structures, while Santa Ana winds funnel through the Cajon Pass every fall and peel back shingles or lift lightweight patio covers on older tract roofs. Those wind events are a seasonal failure mode coastal contractors rarely see, but we plan for them on every Ontario exterior project.
Styles & brands we work with
Our Main Ontario Services
Two services drive most of the calls we get from Ontario homeowners. One is full general contracting for larger projects that span multiple trades. The other is whole-home remodeling, where the scope may run from a single kitchen or bath to a top-to-bottom interior update.
General Contractor in Ontario
Acting as your General Contractor in Ontario means one accountable team manages every trade, permit, and material decision from demolition to final inspection. That matters on Ontario’s older lots, where an addition or teardown-and-rebuild often uncovers surprises: original galvanized supply lines, lath-and-plaster walls that need full removal, and slabs that require structural evaluation before any new framing goes up. We handle the coordination so you don’t carry that burden.
Home Remodeling in Ontario
Home Remodeling in Ontario typically starts in the kitchen or bath, but it often expands once homeowners see how an older Ontario tract home can be reconfigured. We open walls, move plumbing, update electrical, and finish with materials from the brand lines we carry, including Kohler fixtures and Cambria or Caesarstone countertops. Every project gets a written scope and fixed pricing before work begins.
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 most often means bringing a 1950s – 1970s tract home up to today’s standards for layout, energy performance, and durability. The work frequently includes removing drywall-and-lath plaster to access old galvanized plumbing and undersized electrical panels, then rebuilding with modern mechanicals and insulation. Because Ontario summers run hot and dry and Santa Ana winds arrive every fall, we also focus on ventilation, window performance, and exterior materials that handle both extremes. This is the full scope of what we cover under our Home Renovation service, from structural changes to finish work.
Home Renovation Contractors
Signs you need it
You’re living with a layout that no longer works, original plumbing that’s failing, or walls that hide outdated wiring and no insulation.
What it costs in Ontario
Whole-home renovation in Ontario typically falls between $45,000 and $130,000 depending on square footage and how much of the old mechanical and structural work has to be redone.
How we do it
We start with a structural and mechanical assessment, pull permits, then sequence demolition, rough-in, insulation, drywall, and finish work so the home stays weathertight through each phase.
Home Improvement Contractors
Signs you need it
Your Ontario home needs multiple smaller upgrades at once, like new windows, a kitchen refresh, or flooring, and you’d rather coordinate them through one team than hire separate contractors.
What it costs in Ontario
Scoped home improvement packages in Ontario generally run $14,000 to $45,000 when they include a kitchen or bath, with smaller individual projects starting around $2,000.
How we do it
We bundle the work into one contract, order materials from our brand lines, and schedule trades back-to-back so the project finishes in weeks rather than months of separate visits.
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 full home renovation in Ontario typically costs $45,000 to $130,000. Kitchens run $14,000 – $45,000 and bathrooms $9,000 – $28,000, with the final number set by square footage, structural work, and material choices. Call (877) 752-4194 for a written quote.
Do I need a permit for home renovation in Ontario?
Yes, most structural, plumbing, and electrical work in Ontario requires city permits. We pull all permits for your project and schedule inspections through the city, so compliance is handled before you sign. Call (877) 752-4194 to discuss your scope.
Brands We Service in Ontario
We install and service material lines from Cambria, Silestone, Caesarstone, and Kohler, with product samples available during your estimate. Parts and finish materials are ordered direct from the manufacturer, not big-box substitutes, so turnaround stays predictable. You can browse the full set of manufacturers on our brands page.
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 |
| Roof replacement | $8,000 – $20,000 |
| 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 |
| ADU construction | $90,000 – $220,000 |
Prices push toward the top of these ranges in Ontario when we’re working on an older tract home that needs full plumbing replacement, structural reinforcement for a slab addition, or Title 24 energy upgrades. Santa Ana wind exposure can also raise exterior costs, since roofing and patio structures need upgraded fastening and fire-resistant materials. Every quote is fixed and in writing before work starts, with no change orders unless you change the scope.
Neighborhoods We Serve in Ontario
We work across Ontario’s ZIP codes 91758, 91761, 91762, and 91764, from the older postwar tracts near downtown to the newer subdivisions east and south toward the 15 and 60 freeway corridors. Typical response for an estimate in Ontario is one to two business days.
- Downtown Ontario
- North Ontario
- South Ontario
- Creekside
- Archibald Ranch
Service Area – Cities Near Ontario
Milpitas Construction also serves homeowners in the surrounding Inland Valley. We work regularly in Montclair, CA, Upland, CA, Chino, CA, and San Antonio Heights, CA, where the housing stock and climate conditions closely mirror Ontario’s older tract inventory.
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 estimates are scheduled within one to two business days, and we can typically start within two to four weeks once permits are approved. City permit timelines in Ontario vary by project scope, so larger additions may take longer to start. Call (877) 752-4194 to check current scheduling.
Yes, we prepare submittal packages for HOA architectural review in Ontario’s newer master-planned communities. For exterior work on homes in Archibald Ranch or similar HOAs, we handle the application and revision process as part of the contract. We also coordinate city permits separately.
We work primarily on Ontario’s older housing stock, the 1940s – 1970s single-story stucco homes that make up much of the city. That includes full renovations, additions, and garage conversions, where we address original plumbing, lath-and-plaster walls, and shallow slab conditions directly.
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
"Good crew. Would use again."
— Ernesto Mendoza"Allowances in the contract were realistic rather than artificially low to make the bid look good."
— Travis Mercer"He was upfront about a soil issue that added cost early rather than absorbing it and surprising us at the end."
— Claudia Martinez