Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Installation Across West Hills
Window installation in West Hills isn’t like window installation in Canoga Park or Woodland Hills. West Hills sits in a Very High Fire Hazard Severity Zone, and that single designation changes what windows you can legally install, what a permit review will demand, and what a reputable installer should know before they ever quote a frame. We’re TruePane Windows & Doors, and we’ve been working the hillside streets and ranch tracts of West Hills long enough to know that a bid from an out-of-area crew often falls apart at the permit counter. Call (888) 635-0804 and we’ll walk you through what your house actually needs.
Why TruePane Windows & Doors Is West Hills’s Preferred Window Installation Company
We’re not a franchise outfit that parachutes into West Hills with a truck and a clipboard. TruePane is a second-generation glazier’s company, founded by Dale Kessler, and our crews know the streets above Roscoe Boulevard, the ranch tracts off Sherman Way, and the custom homes backing up to the Santa Susana foothills. When a West Hills homeowner calls us about a fogged slider or a window that binds in July heat, we know what we’re likely to find before we pull into the driveway.
Our technicians are background-checked and uniformed. They measure every opening twice. They register both manufacturer warranty layers in writing before the truck leaves the driveway. That’s The Keystone Standard, and it’s on every job we do in West Hills. We also back the workmanship with a Done Right Promise. No paperwork fights. No fine print. If the pane is not true, the job is not done.
West Hills homeowners have called us for over a decade for single-hung retrofits, full-home slider replacements, and post-fire rebuilds. A live person answers the phone 24 hours a day, not a voicemail tree. That matters when you’ve got a broken window on a windy October night and you want to talk to someone who knows the difference between a 1960s aluminum frame and an SFM-listed assembly.
Our Window Installation Services in West Hills
Fixed & Picture Windows
Fixed windows do real work in West Hills, especially on the north-facing sides of ranch homes where the Santa Susana winds push hard against glass all winter. We install picture windows with SFM-listed dual-glazed low-E glass where permits require it, and we set them plumb and square so the seals hold through a decade of thermal cycling. A properly set picture window on a 1960s West Hills ranch should not need re-sealing because it was measured once and installed badly.

Sliding Windows
The original aluminum sliders on 1960s and 1970s West Hills homes are the single most common replacement we do. The frames warp. The rollers wear flat. The seals die young because summer highs over 100°F push the aluminum through expansion cycles it wasn’t designed to survive. We replace them with fusion-welded vinyl or thermally broken frames, sized correctly for the opening, and we flash them to keep wind-driven rain out of the wall cavity.

Casement Windows
Casement windows give West Hills homeowners something a slider can’t: a positive seal against wind. When a Santa Ana event funnels down the Pass, a properly cranked casement press-seals against its weatherstripping instead of just overlapping it. We install casements in hillside custom homes and ranch retrofits where the homeowner wants both ventilation and a tight closure. The hardware matters, and we quote manufacturer lines side by side so you see exactly what you’re buying.

Awning Windows
Awning windows work well in the lower sections of West Hills homes, especially in bathrooms and kitchens where a hopper or slider lets in dust and wind. Because they hinge at the top and open outward, they shed rain even when left cracked open during a passing storm. We set awning windows with the same flashing and leveling discipline as every other Window Installation we do.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in West Hills
We’re an authorized installer for more than a dozen manufacturer lines, including, PGT, and CGI. For West Hills specifically, we often quote Milgard Tuscany for ranch retrofits and CGI for hillside homes where the fire-hazard classification demands a stronger frame. We also work with CWS and ES Windows when a homeowner wants a specific look or a narrow-frame profile. We keep the paperwork straight on warranty registration so you don’t have to chase a manufacturer’s phone tree later.
Common Window Installation Problems We See in West Hills Homes
- Non-rated windows ordered before the permit. A homeowner gets a bid from an installer who doesn’t know West Hills is in a VHFHSZ. The frames arrive, the permit review flags them, and the project stalls for weeks. We check the compliance path before we order anything.
- Seal failure from thermal expansion. The stretch of summer days above 100°F in the West Valley murders single-pane aluminum seals. A half-measure retrofit can fail within two years. We write this into the quote so there are no surprises.
- Hillside access for oversized units. The northern streets above Roscoe Boulevard don’t always give a crew room to stage a 6-foot picture window. We scope the material haul before we commit to a day on site. If it needs a lift or a second set of hands, that’s in the estimate, not a change order.
- Original aluminum sliders and hollow-core patio doors. These are the windows-and-doors equivalent of an open gate in a fire zone. They leak air, warp in heat, and don’t come close to current standards. We replace them with assemblies that pass a VHFHSZ review the first time.
Pricing for Window Installation in West Hills, CA
So you know the numbers before you call. A single casement window install in West Hills typically runs $850 to $1,600, depending on frame line and opening condition. A fixed picture window runs $700 to $1,400 installed. Sliding window replacements on a 1960s ranch run $900 to $1,800 per opening, and if we’re replacing an original aluminum slider with an SFM-listed assembly, expect the glazing and frame cost to push toward the higher end of that range. Full-home retrofits on a three-bedroom ranch typically land between $14,000 and $28,000. Add 10 to 20 percent for hillside access, lead-safe practices on pre-1978 paint, or oversized openings that need a custom frame. We quote line by line, on paper, and the number we quote is the number on the bill. Call (888) 635-0804 for a free estimate.
We Also Serve Cities Near West Hills
TruePane serves Window Installation in West Hills and the surrounding communities: Canoga Park, Woodland Hills, Calabasas, and Chatsworth. If you’re in a neighboring area and facing the same VHFHSZ permit requirements or wind-driven seal failures, we’ll give you the same straight answer we give everyone.
Serving West Hills, CA - Our Local Coverage Area
We’re based in the West Hills 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 - Window Installation in West Hills
Yes. West Hills is in a Very High Fire Hazard Severity Zone, so any window or door replacement permit triggers a VHFHSZ compliance review that requires State Fire Marshal-listed fire-resistant glazing and door assemblies. A 1960s ranch with original aluminum sliders will not pass that review without a product swap. We check this before we quote so you don’t order the wrong frame. Call (888) 635-0804 and we’ll confirm what your specific opening requires.
West Hills sits directly below the Santa Susana foothills, where wind events funnel down the Pass with more force than in flatland communities to the east, and summer highs routinely exceed 100°F. The combination of wind-driven pressure and aggressive thermal expansion cycles stresses single-pane aluminum frames and wears out weatherstripping years faster. We replace them with fusion-welded vinyl or thermally broken frames that tolerate the thermal load. For an exact recommendation, call (888) 635-0804.
No. Detached ADUs in West Hills fall under county setback and septic/well clearance rules, and if the old structure sits within a required setback, new openings still trigger the same VHFHSZ fire-rated glazing review as the main house. We scope setbacks before ordering any frame. Call (888) 635-0804 and we’ll tell you what applies to your lot.
Fusion-welded vinyl frames don’t rely on screws and corner gaskets the way older mechanically fastened aluminum frames do. On a hillside custom home where wind loading is higher and summer heat swells the frame, a welded corner resists warping and seal separation for decades. We install fusion-welded frames from Milgard, CWS, and ES Windows on most hillside jobs. Call (888) 635-0804 for a side-by-side quote on frame lines.
Usually no. If the windows are not SFM-listed fire-resistant assemblies, the VHFHSZ review will reject them, and you’ll be stuck returning the order and re-buying compliant frames. On one hillside street above Roscoe Boulevard, we took over a job where the previous installer had already ordered non-compliant units; we swapped the order to SFM-listed fusion-welded frames, flashed them correctly, and kept the inspection on schedule. Call (888) 635-0804 and we’ll help you sort out the order before you lose more time.
Call TruePane for Window Installation in West Hills, CA
If you’re in West Hills and you need windows installed, replaced, or upgraded to meet current fire-hazard zone requirements, call (888) 635-0804. We’ll answer the phone. We’ll give you a free estimate, a line-by-line quote, and a straight answer about what your house needs. West Hills is our home turf, and we plan to be here in thirty years.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving West Hills with a craftsman’s standard since 2008.



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