Ontario prices
Pricing a low-slope roof
Flat roofing is priced by the square like everything else, but the cost sits in the details — terminations, drains, and how the membrane meets every wall it touches.
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- Deleted after 90 days. If nobody can take it on, or you do not say yes, your contact details are deleted 90 days after your request.
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Nobody will call you about this request unless you say yes to a company by name.
These are estimated ranges, not quotes. Compiled from public installed-cost data for California and adjusted for how Ontario is built. No contractor is bound by them, and nobody can price a roof they have not stood on.
| Covering | Per square | Typical whole roof | Expected life |
|---|---|---|---|
| Architectural asphalt shingleThe default choice on most American homes, and usually the right one. | $650 – $1,000 | $11,500 – $28,000 | 25 to 30 years |
| 3-tab asphalt shingleThe cheapest thing that still counts as a roof. Fewer and fewer crews will install it. | $550 – $750 | $9,900 – $21,000 | 15 to 20 years |
| Impact-rated asphalt shingleClass 4 rated. Often earns an insurance discount where hail is a factor. | $850 – $1,300 | $15,500 – $36,500 | 25 to 35 years |
What moves the price
- The number of penetrations: chimneys, skylights, vents, solar mounts
- Warranty tier, which is really a question about who honours it in fifteen years
- Access — a truck that cannot get near the house adds hours to every load
- How many old layers have to come off before the new one goes on
- Whether the valleys, drip edge and step flashing are being replaced or reused
Locally
These winds are not constant, which is the problem. A roof gets nine quiet months and then one night at fifty miles an hour, and whatever was marginal goes.
Be careful with coatings sold as replacements. Coating a sound roof buys years; coating a failed one buys a fresh colour.
These are estimates, not quotes. They are compiled from national installed ranges adjusted for California costs and for how Ontario is built. No contractor is bound by them.
Questions about price
Can I stay in the house while it is done?
Most people do. Expect noise from early morning, dust in the attic, and a day where the driveway belongs to the crew.
Do you cover the whole San Bernardino County area?
We match across Ontario and the neighbouring communities in San Bernardino County. Put the ZIP of the property in and it will route to whoever actually covers it.
Why three quotes and not one?
Because one price tells you nothing. Three tells you where the middle is, and the outliers are informative in both directions — the very cheapest is usually leaving something out, and the most expensive should be able to say what you are getting for it.
What is it going to cost?
Free, no obligation, and your details go to no company until you say yes.