Contact Ontario Window Replacement for a free estimate

A real person from Ontario Window Replacement reads it, calls you back, and books a site visit — usually within one business day. We measure, look at the actual condition of the work area, and send a written, itemized free estimate. No deposit, no obligation, and no pressure call afterwards.

In a hurry? Calling (844) 511-2320 is always faster than a form.

Monday through Saturday, 8am to 6pm, with emergency calls answered outside those hours. Forms that arrive in the evening get a call back the next morning, and a site visit is usually booked within one to two business days depending on where in the West End of the Inland Empire you are.

Everything is handled by Ontario Window Replacement people in Ontario, CA — not an overseas call centre working from a script. If you would rather not explain the whole thing twice, calling (844) 511-2320 once beats a form and a follow-up.

Most of the requests that land here fall into a handful of jobs. If yours is on this list, there is already a page with scope, materials and pricing detail for Ontario:

• Energy-Efficient Glass for Homes and Suites — Energy-efficient glass pays back on a schedule, and the two buildings we work on keep opposite schedules. A house in Ontario sits empty at two in the afternoon and full at eight at night.
• Vinyl Window Replacement — Vinyl is the correct answer for most houses in Ontario and the wrong answer for almost every storefront. That sentence is the whole page, but the reasons behind it decide whether you get a window that lasts thirty years or one that sags in eight.
• Fiberglass Window Replacement — Fiberglass exists to solve three specific problems: dark colors at large sizes, thin sightlines on a wide opening, and a frame that will accept paint later. If none of those apply to your house, you are about to spend money for nothing.
• Clad-Wood Windows — Clad-wood is the only window we sell for a reason that is not technical. You buy it because you want wood on the inside of the room, and everything else about the product is engineering built to make that survivable outdoors.
• Aluminum Windows and Thermally Broken Framing — Aluminum is the clearest case on this site of one word meaning two opposite things. In a house in Ontario it is usually the window we are removing.
• Double-Hung and Single-Hung Windows — The hung window is a transplant in Ontario. It is the eastern and midwestern default, it arrived here with tract builders copying catalogs, and it is chosen for how a house looks far more often than for how the window works.

Something not on the list? Send it anyway. The list covers what we see most often around Ontario, not the limit of what we handle.

Ontario and the surrounding communities of the West End of the Inland Empire, including Chino, Chino Hills, Montclair, Upland, Pomona. Each of those has its own page with local detail:

• Chino, CA — San Bernardino County, incorporated in 1910
• Chino Hills, CA — San Bernardino County, incorporated in 1991
• Montclair, CA — San Bernardino County, incorporated in 1956
• Upland, CA — San Bernardino County, incorporated in 1906
• Pomona, CA — Los Angeles County, incorporated in 1888
• Claremont, CA — Los Angeles County, incorporated in 1907

Or start from the full list of Ontario services.

Rough measurements or square footage, photos of the area from a few angles, any material or finish you already have in mind, and your target timeline. None of it is required, but it makes the first free estimate far more accurate.

Nothing. The site visit and the written, itemized free estimate are free across Ontario and the West End of the Inland Empire, with no deposit and no obligation to book. We would rather price the job properly and lose it than win it on a number we made up over the phone.

Yes. Ontario Window Replacement runs its own crews in Ontario, CA — the people who quote your window job are the people who show up to do it. Licensed California contractor holding the CSLB C-17 glazing classification, the classification that covers cutting, assembling and installing glass in dwellings and in commercial structures alike, General liability and workers compensation in force, plus the $25,000 contractor's license bond every California licensee has been required to carry since Senate Bill 607 took effect on January 1, 2023. Nothing gets sold on to whoever is cheapest that week.