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 General Contractor Across Ontario
If you own a home in Ontario and you’re searching for a general contractor who actually understands the Inland Valley, you’ve found the right crew. Gold Star Contractors handles full remodels, additions, roofing, window replacements and ADU projects across Ontario, from the older ranch blocks near Euclid Avenue to the newer tracts pushing east. Our team, led by Noel Carranza, has walked enough of these 1950s and 1960s slabs to know exactly what opens up when the drywall comes down. Call (833) 382-8544 and we’ll talk through your project the same way we would with a neighbor.
Why Gold Star Contractors Is Ontario’s Preferred General Contractor Company
People in Ontario don’t want to juggle a roofer, a plumber, an electrician and a tile guy. They want one crew that takes responsibility when the cast-iron drain line is scaled shut and the new shower is already ordered. That’s what we do. When we work in Ontario, we already know the housing stock. We know the 91762 ranches south of the 10. We know the 91764 neighborhoods near Ontario High. We’ve pulled permits at the city counter and we know how Ontario’s inspectors think. That matters when a remodel reveals wiring from the Eisenhower administration and the code requires a grounded circuit before you can close the wall.
Our General Contractor team manages every trade under one roof. You get one point of contact, one schedule, and one accountable contractor from the first demolition swing to final inspection. Homeowners across Ontario reach out because they heard from a neighbor that we actually answer the phone, actually show up, and actually stand behind the work.
Styles & brands we work with
Construction Company in Ontario
Construction Company work in Ontario splits into two very different worlds. On the residential side, we’re remodeling mid-century stucco ranches on slab foundations, the kind built before grounded electrical was standard. On the commercial side, Ontario’s logistics economy keeps pushing tilt-up warehouses and industrial shells along the I-10 and Highway 60 corridors. Gold Star Contractors works both, and that experience transfers. The same crew that pulls a clean permit package for a 91762 kitchen remodel also understands sequencing a larger structural scope. A typical Ontario kitchen remodel runs $14,000 to $45,000. A bathroom remodel runs $9,000 to $28,000. A home addition in Ontario typically lands between $45,000 and $130,000 depending on foundation work and square footage.
Slab Foundation Scope
Most of the older Ontario homes sit on post-tension or conventional slabs. That changes how we rough in plumbing, how we route electrical, and how we plan for additional structural loads. It also means any remodel that opens walls triggers code compliance on items the original builder never had to address.
Utility Retrofit Reality
On a 1962 ranch off Euclid Avenue in 91762, our crew opened a bathroom wall for a walk-in shower rough-in and found cast-iron drain pipe scaled shut and cloth-wrapped wiring with no ground. We replaced the drain to the main stack and ran a grounded circuit to the panel before inspection sign-off, then matched the existing 4-inch tile with a marine-grade epoxy grout to survive the dry heat. That’s the Ontario remodels we know best.
Remodeling Contractor in Ontario
Remodeling Contractor work in Ontario means knowing the difference between cosmetic refresh and real structural renovation. When we remodel a kitchen or bath in an Ontario ranch home, we’re not just swapping finishes. We’re correcting forty years of deferred maintenance, undersized electrical, and original plumbing that’s past its service life. A small bathroom remodel in Ontario typically runs $5,000 to $12,000. A walk-in shower installation runs $4,500 to $12,000. Window replacement for a whole single-story ranch in Ontario runs $4,500 to $15,000 depending on the glazing package. Those are real numbers we stand behind.
Hidden Surprise Scope
In the older 91761 and 91762 pockets near downtown, original cast-iron drain lines and two-wire electrical without grounds hide behind tile and plaster. Any remodel that opens those walls triggers mandatory upgrades under current California code. Inland-spec bids routinely omit that, which is why your cheap quote turns into change orders by week two. We write allowances for it, because we already know it’s there.
Tile and Finish Specification
Ontario’s dry heat and wind cycle stress tile and grout differently than coastal cities. We specify marine-grade epoxy grouts and sealants, we float floors when the slab isn’t level, and we never install cabinetry on a slab that hasn’t been moisture-tested. It costs a little more up front and it lasts decades longer, which is the point.
Trusted Brands We Service in Ontario
We don’t push one brand because we got a good deal on it. We specify what actually performs in Ontario’s climate. For entry doors we often recommend Therma-Tru, because their fiberglass doors don’t warp in the dry heat. For outdoor living and structural fencing, Master Halco posts and treatment hold up better against the Santa Ana wind-and-dust cycle. We also work with ViewLux and Barrette product lines for exterior glazing and fencing applications. When you’re in Ontario and you want a specific brand, we’ll source it, install it, and stand behind it. Premium materials, professionally installed.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Ontario Homes
- Specifying electro-galvanized fasteners and standard steel railings for inland projects, then watching them fail early when Santa Ana winds drive abrasive dust into joints and accelerate corrosion. We specify hot-dip galvanized or stainless hardware on every exterior package, which closes the price gap between the cheap spec and the coastal-spec on day one.
- Skipping a slab moisture test on 1950s to 1970s ranch remodels, leading to buckled subfloor and failed cabinet installs after the first hot-dry cycle. We test before we build, because the fix cost after the fact is triple.
- Writing vague allowances for plumbing and electrical on older downtown-core homes, then issuing change orders when cast-iron drains or ungrounded wiring are discovered mid-rough-in. We write real line items with real allowances, so the contract reflects the actual work.
- Under-specifying window packages for Ontario’s summer heat, leading to solar gain that cooks kitchens and forces HVAC oversizing. We specify low-E glazing and insulated frames that match the exposure direction of each elevation.
Pricing for General Contractor in Ontario, CA
Ontario pricing splits two ways, and we want you to understand the gap before you sign anything. The inland-spec version uses standard fasteners, paint-grade caulks and commodity fixtures. It will cost less today and fail faster. The coastal-spec version we recommend uses hot-dip galvanized hardware, marine-grade sealants, and finish materials rated for long dry-heat cycles. It runs about 8 to 15 percent higher on exterior-heavy scopes, and it saves you a full replacement within a decade. Here’s what we actually quote in the local market:
| Service | Ontario Price Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
| Roof Replacement | $8,000 – $20,000 |
| Window Replacement | $4,500 – $15,000 |
Every estimate is written, line-itemed, and free. Call (833) 382-8544 and we’ll walk your property, test what needs testing, and give you a real number.
We Also Serve Cities Near Ontario
If you’re just outside the city line, we still show up. Gold Star Contractors serves Montclair, Upland, Chino and San Antonio Heights with the same crews and the same material spec we use in Ontario. The drive is short and the standards don’t change.
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 General Contractor in Ontario
Yes. Any remodel that opens walls, alters plumbing or electrical, or changes the building envelope requires a permit from the City of Ontario. If your contractor says otherwise, walk away. We pull permits, schedule inspections, and close out clean with the city. Call (833) 382-8544 to verify your scope.
The difference is hardware, sealants and finish grade. Coastal-spec uses hot-dip galvanized fasteners, stainless railing components, and marine-grade joint sealants rated for wind-and-dust cycles. Inland-spec cuts those corners to save about 8 to 15 percent now, and the cheap version costs more within a decade when corrosion and joint failure force replacement.
We already expect it. Homes built in the early 1960s along the Euclid corridor in 91762 typically have original cast-iron drain lines. When we open the wall and confirm it, we replace the drain to the main stack before we set the new fixtures, and we don’t bury it in a change order later. The exact fix depends on pipe condition, access, and the inspector’s requirements. Get a free walkthrough at (833) 382-8544.
Because moisture rises through 1950s and 1970s slab foundations here. The hot, dry cycles pull moisture through uncapped slabs, and older ranches often lack a proper vapor barrier. When we test and find high moisture, we replace the subfloor and install a barrier before cabinetry and tile go down. Skipping that step is how you get buckled floors and ruined cabinet installs a year later.
A line-item scope, a materials list with brand names, a permit responsibility clause, a change-order protocol, and a payment schedule tied to inspection milestones. If the contract says “to be determined” for plumbing or electrical on an older Ontario home, ask for a real allowance number. We write it all out before demo day.
Written by Noel Carranza, owner at Gold Star Contractors, serving Ontario and the Inland Valley with full-scope general contracting since day one.
Ready to price your remodel? Call (833) 382-8544 today and schedule your free, line-itemed estimate with Gold Star Contractors.