Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Sliding glass doors
Impact garage doorsPGTCGI
Before
After
Before
After
Before
AfterFast, Reliable Custom Windows & Doors Across Ontario
Custom windows and doors in Ontario, CA means dealing with more than standard sizes. The city’s post-war tract homes, 1920s Craftsman bungalows near Euclid Avenue, and newer builds south of the 10 each demand different glass specs, frame reinforcement, and installation methods. We measure every opening twice, quote manufacturer lines side by side on paper, and register both warranty layers before the truck leaves your driveway. If you’re pricing custom windows or a replacement door in Ontario, call (888) 635-0804 for a written line-item estimate.
Why TruePane Windows & Doors Is Ontario’s Preferred Custom Windows & Doors Company
We’ve worked Ontario homes long enough to know what the valley floor does to a window frame. The same house that cools fine in March will have a slider that binds by July, and a door that gaps in January. Our techs grew up in this trade, not a franchise training manual. Dale Kessler founded TruePane in 2008 on a rule that still governs every install: if the pane is not true, the job is not done.
Ontario homeowners call us because we answer the phone. A live person picks up 24 hours a day, seven days a week, not a voicemail tree and not a regional call center. We schedule, we show up when we say, and the uniformed technician who measures your windows is the same background-checked craftsman who installs them. Most custom window and door jobs in Ontario are completed in a single visit.
Our reputation in the Inland Empire is built on the Done Right Promise and The Keystone Standard. Both manufacturer warranty layers are registered in writing, with durations stated, before we leave the driveway. If something isn’t done right, we make it right. No paperwork fights, no arguing, no fine print that covers neither.
Key Takeaways
- Ontario’s clay soils and Santa Ana winds demand reinforced framing and custom sizing, not off-the-shelf units.
- We register both manufacturer warranty layers in writing before the truck leaves your driveway.
- Background-checked, uniformed technicians complete most jobs in one visit.
- Live person answers every call at (888) 635-0804, any hour.
Our Custom Windows & Doors Services in Ontario
Custom Shape Windows
Ontario’s older east-side neighborhoods near the airport and the Euclid Avenue corridor are full of 1910s through 1930s Craftsman and Spanish Revival homes with arched, round, and trapezoidal openings. Standard rectangular units will not fit these openings, and forcing them in means cutting structure or living with ugly infill. We order true custom shape windows with the exact radius, arch, and camber the original builder intended, matched to Ontario’s Title 24 Climate Zone 10 low-SHGC requirements. A custom arch window in Ontario typically runs $900 to $2,800 installed depending on glass package and frame material.
Commercial Storefront Glazing
Storefronts along Holt Boulevard and the retail corridors near Ontario Mills take a beating from afternoon heat and airborne dust off the valley floor. We install and service commercial storefront glazing, entry systems, and glass replacements for Ontario storefront owners who need a crew that shows up during business hours or after close, handles the permit, and gets the opening weather-tight before the next Santa Ana event. Storefront glass replacement in Ontario usually runs $40 to $90 per square foot installed, including tempered glass where code requires it.
Curtain Wall Systems
For Ontario commercial buildings and larger residential remodels, a curtain wall system carries glass loads across spans that individual windows cannot. The wind loads funneling through the Cajon Pass to our north mean a curtain wall in Ontario must be engineered differently than one in coastal Orange County. We spec reinforced mullions and deeper anchoring systems, and we pull the structural calculations before we cut the first piece of metal. Curtain wall installation in Ontario typically starts around $95 per square foot and climbs with engineering requirements, glass weight, and access difficulty.
Architectural Grilles & SDLs
Many Ontario homeowners near the historic Euclid Avenue corridor want the divided-light look of a 1920s Craftsman without giving up modern insulated glass. Simulated divided lites, or SDLs, give you true muntin bars applied to the interior and exterior of a single insulated glass unit, so you get the period look and the low-E, argon-filled performance. This is the most common upgrade we install on Ontario’s older housing stock. Architectural grilles and SDLs add roughly $150 to $450 per window depending on pattern complexity and bar profile.
Trusted Brands We Service in Ontario
TruePane is an authorized installer for more than a dozen manufacturer lines, including, PGT, and CGI. We also work extensively with ES Windows, CWS, and ECO Window Systems for Ontario homeowners who want a specific visual profile or performance spec. Because we stock common parts and glass locally, turnaround on warranty work and replacement sashes in Ontario runs days, not weeks. We quote manufacturer lines side by side on paper so you see exactly what you’re buying and what each line costs.
Common Custom Windows & Doors Problems We See in Ontario Homes
- Binding doors and cracking window corners from expansive clay soils. Ontario’s valley-floor clay expands when wet and shrinks when dry, moving 1960s and 1970s slabs seasonally. A door that rubs in July and gaps in January usually means the rough opening needs to be re-squared and the door re-hung on a reinforced jamb, not that the hinges need oiling.
- Blown-out weatherstripping from Santa Ana winds. When 50 to 60 mph gusts funnel through the Cajon Pass, they pressure-test every exterior door on an Ontario home. Poorly sealed assemblies leak air, dust, and noise. We re-seal and reinforce door frames, and we recommend upgraded weatherstripping that actually stays put.
- Original single-pane aluminum windows falling short of Title 24. Ontario’s 1950s through 1970s tract homes were built with aluminum sliders that do not come close to Climate Zone 10 U-factor and SHGC limits. Any remodel that opens a wall triggers full replacement to code. We handle the permit, the specs, and the inspector sign-off.
- Non-standard openings in older Euclid Avenue corridor homes. 1910s through 1930s Craftsman and Spanish Revival houses rarely have a single opening that matches a modern stock size. Custom or specially sourced units are required, and the framing around those openings often needs rework to meet current load requirements.
Pricing for Custom Windows & Doors in Ontario, CA
Custom window pricing in Ontario depends on the opening, the glass package, and what we find when the old unit comes out. A standard custom double-hung for a tract home runs $650 to $1,400 installed. Custom shape windows start near $900 and climb past $3,000 for large arched units with engineered glass. Architectural grilles and SDLs add $150 to $450 per window. Oversized glass panels, often used in Ontario mid-century remodels, run $800 to $2,500 per panel depending on size, low-E coating, and whether the panel is tempered or laminated. Storefront glazing lands between $40 and $90 per square foot.
What moves the number in Ontario? The valley-floor clay soils often require reframing around existing openings, and that work is written into your quote as a line item with a stated allowance, never buried in a vague “miscellaneous” charge. We inspect first, write the allowance into the contract, and if a surprise does surface once the wall is open, it gets priced and approved in writing before we touch it. Call (888) 635-0804 for a free, written, line-item estimate. We also honor a permanent 5% discount for seniors and veterans, plus a free written repair estimate.
Here’s a snapshot of typical Ontario market ranges:
| Project | Typical Ontario Range |
|---|---|
| Custom double-hung window (tract home) | $650-$1,400 installed |
| Arch or radius custom window | $900-$2,800 installed |
| Architectural grilles / SDLs (per window) | $150-$450 add-on |
| Oversized glass panel (residential) | $800-$2,500 per panel |
| Commercial storefront glass | $40-$90 per square foot |
| Curtain wall system | From $95 per square foot |
The Ontario Conditions That Change How We Build
There is no other city in our Inland Empire service area where the ground and the wind conspire against a window frame quite like Ontario. The city sits on the floor of the San Bernardino Valley, where Santa Ana winds funneling through the Cajon Pass hit 50 to 60 mph and routinely rack lightweight aluminum frames. At the same time, expansive clay soils shift 1960s and 1970s slabs so door frames bind in summer and gap badly in winter. We get “sticky door” service calls in Ontario nearly as often as we do full window replacements.
On a 1960s stucco tract home near the Euclid Avenue corridor, our techs pulled an original aluminum slider and found the rough opening undersized for today’s Title 24 Climate Zone 10 low-SHGC requirements. We reframed the jamb, installed a Milgard double-hung with argon-filled low-E glass, and wrapped the new opening in flashing tape before re-stuccoing. Then we wrote the code-triggered upgrade into the permit before the inspector arrived. That is how we work in Ontario: inspect first, write the allowance into the contract, and price any surprise in writing before we touch it.
This is the page-level knowledge a national window site cannot give you. Valley-floor expansive soils and Cajon Pass wind loads dictate custom window and door framing, sizing, and glass specs here in ways that a generic article ignores. Ontario’s older homes near the airport also contend with more settled airborne dust than neighborhoods in Upland or Rancho Cucamonga, which means we recommend tight-sealing frames and higher-grade weatherstripping on east-side installations.
We Also Serve Cities Near Ontario
TruePane crews serve Ontario and the surrounding Inland Empire communities from our Riverside-San Bernardino office. If you live in Montclair, Claremont, Upland, or Rancho Cucamonga, the same background-checked technicians and the same Done Right Promise apply. Call (888) 635-0804 and a live person will schedule your free estimate.
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 - Custom Windows & Doors in Ontario
In almost every case, yes, you need full replacement. Ontario’s 1950s through 1970s tract homes were built with single-pane aluminum frames that fail Climate Zone 10 U-factor and SHGC limits by a wide margin, and swapping glass alone doesn’t fix the frame’s thermal bridging or air leakage. When the wall is opened for any remodel, the code requires the entire assembly meet current standards. Call (888) 635-0804 and we’ll tell you exactly what your home needs, in writing, for free.
Ontario sits on valley-floor expansive clay that swells when wet and shrinks when dry, and the seasonal movement of your 1960s or 1970s slab is enough to rack a door jamb by a quarter inch or more. Rancho Cucamonga homes on the foothills sit on better-draining, more stable soils. The fix in Ontario is re-squaring the rough opening and reinforcing the jamb before re-hanging the door, not trimming the door slab. Call (888) 635-0804 for an inspection and a written quote.
Yes. We install simulated divided lites, or SDLs, that apply true muntin bars to the interior and exterior of a single insulated glass unit, so the window reads as a true divided-light Craftsman window from the curb while carrying low-E, argon-filled performance inside. We match the original bar profile and spacing so the window looks like it grew there. Call (888) 635-0804 and we’ll quote your Craftsman openings side by side across manufacturer lines.
Homes east of Euclid Avenue and near the airport see more settled airborne dust and more frequent wind-driven debris than neighborhoods to the west or north. That means we recommend tighter-sealing frames, upgraded weatherstripping, and for doors, reinforced threshold assemblies that hold up to pressure differentials when gusts hit. Call (888) 635-0804 and we’ll look at your specific exposure and recommend the right spec.
Once a wall is opened, California Title 24 Climate Zone 10 requirements apply to the entire assembly, including the rough opening, flashing, insulation, and the window’s U-factor and SHGC. In Ontario, the most common triggered upgrades are reframing an undersized rough opening, adding perimeter flashing and weep screeds to stucco exteriors, and bringing the electrical or plumbing in the opened cavity up to current code. We write these into the permit before the inspector arrives, and you approve any surprise in writing before we proceed. Call (888) 635-0804 for a full pre-inspection.
Get Your Custom Windows & Doors Quote in Ontario
If you live in Ontario, CA and your windows are original to a tract home, or your doors bind with the seasons, or you’re planning a remodel that will open walls and trigger Title 24 requirements, call us. A live person answers at (888) 635-0804. We’ll schedule a free estimate, inspect your openings, and put your quote on paper with line items and warranty durations stated in writing. The Done Right Promise and The Keystone Standard apply to every job we do in Ontario. If the pane is not true, the job is not done.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Ontario and the Inland Empire since 2008.