Architectural shingles
Metal roofing
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GAF
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Roofers in Ontario, CA
Roof inspection in Ontario usually costs between $195 and $450 for a standard single-family home, and it’s the fastest way to find out whether a small repair or a full replacement is actually necessary. Ontario’s particular mix of extreme inland heat and aging mid-century tract housing means roofs here fail in predictable ways, and a trained eye can spot those failures before they turn into a $8,000 surprise. Oakmont Roof Repair has served Ontario since 2013, and we carry seven major roofing brands – GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral – so the recommendation you get is based on what your roof needs, not what we happen to stock. Call (866) 942-0875 to schedule an inspection.
Why Ontario Homes Are Different
Ontario sits in the semi-arid Inland Empire, where summer highs routinely pass 100°F and the sun’s UV exposure works on asphalt shingles every single day. That heat doesn’t just age shingles – it bakes them until the asphalt dries out, the granules loosen, and the shingle edges curl upward. Add the Santa Ana winds that sweep through the Inland Empire each fall, and you get shingles that are already brittle being lifted and snapped at the corners. When the rare winter rain finally arrives, water finds every crack and dry-rotted flashing point those conditions created over the summer.
Ontario’s housing stock adds another layer. The city is dominated by post-war tract homes, mostly 1950s through 1970s single-story ranch and Spanish-style stucco houses with low-pitch gable roofs covered in asphalt shingles. Many of those roofs are now 40-plus years old. In the older neighborhoods near downtown – the 91761 and 91762 ZIPs – a significant share of homes were built before 1960 with original wood sheathing or skip sheathing, which means there’s a hidden layer of spaced boards under the current shingles. That changes how a repair is done and what a replacement costs. Newer east-side developments in 91764 use modern OSB and composite shingles, so the same roof problem in a different part of Ontario can mean a very different job.
Styles & brands we work with
Our Main Ontario Services
Ontario homeowners call us most often for two things: fixing a roof that’s started leaking or losing shingles, and replacing a roof that’s reached the end of its life. Here’s what each involves in Ontario specifically.
Roof Repair in Ontario
Roof repair in Ontario is typically triggered by one of three things: a leak after winter rain, shingles lifted by Santa Ana winds, or a home inspection that flagged roof problems during a sale. In the older 91761 and 91762 neighborhoods, repairs often involve dealing with the original skip sheathing underneath, which means the fix isn’t as simple as swapping a few shingles. In newer 91764 homes, we more often see thermal cracking from the extreme summer heat. Either way, the repair starts with an honest assessment of whether the roof has enough life left to justify the work. Oakmont carries materials from Atlas, Tamko, Boral, and GAF, so we can match the repair to your existing shingles. Read more on our dedicated Roof Repair in Ontario page.
Roof Replacement in Ontario
Roof replacement in Ontario usually makes sense when a roof is 20 to 25 years old, the shingles are visibly curling and losing granules, or there are persistent leaks in multiple spots. Ontario’s heat accelerates shingle aging by roughly 20 to 30 percent compared to coastal California, which means a 20-year shingle often performs like a 15-year shingle here. When it’s time, you’ll choose from asphalt shingles, tile, or metal, and we’ll walk you through what suits a low-pitch ranch versus a Spanish-style stucco home. Because we carry seven manufacturer lines, you’re selecting from real options – Owens Corning, CertainTeed, IKO, and others – not whatever one brand the contractor happens to stock. See the full breakdown on our Roof Replacement in Ontario page.
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.
Roof Inspection in Ontario
A roof inspection in Ontario is the first step when you’ve spotted a water stain, noticed loose shingles after a wind event, or you’re buying or selling a home in the 91758, 91761, 91762, or 91764 ZIP codes. Given the city’s extreme heat and the number of homes built between 1950 and 1980 that are still on their second or third roof, an inspection tells you exactly what condition the roof is in and what it needs – without a sales pitch attached. Detroit’s answer to that question is usually a written condition report, not a quote for a replacement you may not need. Our Roof Inspection service is priced as a standalone visit, so you get an honest answer even if the answer is “your roof is fine.”
Roof Inspection Services
Signs you need it
You see water stains on ceilings, shingles in the yard after wind, or dark streaks on the north-facing slope, and you want to know if it’s a repair or a replacement before calling a contractor for quotes.
What it costs in Ontario
A roof inspection in Ontario typically runs $195 to $450 for a single-family home, with the price depending on roof size, pitch, and whether it’s a standard visual check or a more detailed assessment with photos.
How we do it
We walk the roof surface, inspect flashing, vents, and underlayment, check the attic for ventilation and moisture, and then hand you a written report with photos and a clear recommendation.
Free Roof Inspection
Signs you need it
You’ve recently bought a home in an older Ontario neighborhood like the 91761 or 91762 ZIP and you don’t know the roof’s age or condition, and the seller didn’t provide a recent inspection report.
What it costs in Ontario
We don’t charge for an inspection when it’s part of moving forward on a repair or replacement we end up doing, but a standalone inspection is priced at $195 to $450 depending on the roof’s size and complexity.
How we do it
We schedule the visit, inspect the roof from the surface and the attic, document everything with photos, and then sit down with you to go over what we found and what it means.
What Roof Inspection Costs in Ontario
| Item | Typical range in Ontario |
|---|---|
| Standard visual inspection, single-family home | $195 – $300 |
| Detailed inspection with full photo report | $300 – $450 |
| Inspection for 2-story or steep-pitch roof | $350 – $500 |
How long does a roof inspection take in Ontario?
A standard inspection takes 45 to 90 minutes, depending on roof size and whether the attic is accessible. You get the written report the same day, not a call back next week. Call (866) 942-0875 to book.
Do I need a roof inspection before selling a home in Ontario?
It’s not required, but in Ontario’s older 91761 and 91762 neighborhoods, a pre-listing inspection gives you an honest condition report before buyers start making demands. It costs $195 to $450 and can save you from a bad negotiation later.
Brands We Service in Ontario
We work with Atlas, Tamko, Boral, and GAF, among other manufacturers, and we stock common replacement parts locally for Ontario jobs. That means a simple repair doesn’t wait on a two-week order. Our brands page shows the full lineup and what each material suits best.
See the difference
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After
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After
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AfterPricing for Roofers in Ontario, CA
| Service | Typical range in Ontario |
|---|---|
| Standard roof inspection | $195 – $300 |
| Detailed inspection with photo report | $300 – $450 |
| Inspection for 2-story or steep-pitch roof | $350 – $500 |
| Asphalt shingle repair (leak, 2-story) | $450 – $700 |
| Flashing repair | $375 – $650 |
| Valley repair | $500 – $850 |
| Asphalt shingle replacement (full roof) | $8,000 – $16,000 |
| Tile replacement (full roof) | $14,000 – $22,000 |
| Metal replacement (full roof) | $12,000 – $20,000 |
| Flat roof replacement | $9,000 – $15,000 |
What pushes the price up in Ontario is usually the roof’s age and what’s underneath. Older 91761 and 91762 homes with skip sheathing often need solid sheathing added before new shingles go down, and that’s a real line item. We quote a fixed price up front, and that’s the price you pay – no change orders once the work starts.
Neighborhoods We Serve in Ontario
We inspect, repair, and replace roofs throughout Ontario, from the older downtown core in 91761 and 91762 to the newer subdivisions in 91764 and the surrounding 91758 area. Here are a few of the neighborhoods we work in regularly:
- Central Ontario / Downtown (91761 and 91762) – mostly pre-1960 ranch homes with original wood sheathing and skip sheathing beneath the shingles
- East Ontario (91764) – newer tract developments from the 1980s through 2000s, OSB sheathing, modern composite shingles
- North Ontario (91758) – a mix of older ramblers and some mid-century Spanish-style stucco homes
- South Ontario – warehouse-adjacent residential streets with a concentration of Spanish-style stucco homes
Response time across the city is typically one to three business days for inspections and repairs, depending on the season and whether we’re in the middle of a post-wind-storm rush.
Service Area – Cities Near Ontario
Oakmont Roof Repair covers the broader Inland Empire beyond Ontario. We regularly work in Montclair, CA, where the housing stock is similar mid-century tract construction, and in Upland, CA, which has its own mix of older ranch homes and newer hillside properties with steeper pitches. Chino, CA brings more flat-roof and commercial-adjacent residential work, and San Antonio Heights, CA has bigger lots and tile-heavy roofs. The same inspection-first approach and seven-brand material lineup applies in every city we serve.
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 Roofers in Ontario
We typically schedule inspections within one to three business days across Ontario. Repairs depend on the scope and whether we need to order a specific shingle or material, but common leaks and flashing repairs are usually completed within a week of the inspection. Call (866) 942-0875 and we’ll give you a realistic timeline for your specific roof.
In Ontario, a full roof replacement generally requires a building permit from the City of Ontario, while repairs to the existing roof surface often do not. We handle the permit paperwork and inspections when permits are required, so you don’t have to navigate city hall.
A roof inspection is a paid, standalone assessment (typically $195 to $450 in Ontario) that gives you a written condition report regardless of whether you hire anyone. An estimate is a free quote for a specific repair or replacement we’d be doing. If you’re not sure which you need, call (866) 942-0875 and we’ll steer you straight.
If your roof is leaking, missing shingles, or you simply want to know where you stand before winter arrives, call Oakmont Roof Repair at (866) 942-0875 to schedule your free estimate. We’ve served Ontario since 2013, we carry seven major roofing brands, and we’ll give you an honest answer about repair versus replacement – not a sales pitch.
What happens when you call
- 1A real person answersNo phone trees — talk to a local roofing 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
"Went up in the attic first with a flashlight before going on the roof, which no other estimator bothered to do. Found the stain and worked backward from there."
— Vikram Gupta"Added a ridge vent and cleared the blocked soffit vents. Attic temperature in the summer dropped noticeably and the upstairs is livable now."
— Sarah Vaughn"Valley had been done without proper underlayment and was leaking. Redone correctly, and he explained exactly what had been wrong so I could understand it."
— Alma Guzman