Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Before
After
Before
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Before
AfterWindows & Doors in Westmont, CA
Window installation in Westmont, CA means accounting for a very specific housing stock: post-WWII stucco-over-wood-frame tract homes from the 1940s through 1960s, most still carrying their original aluminum-frame single-pane windows and hollow-core doors. Those original openings were built before modern energy codes, before insulated glazing, and before anyone thought about sound attenuation from the I-110 corridor. We quote every Westmont job with a written price before any work starts, because the measured survey and the final invoice should be the same document. Call (509) 265-6387 to schedule yours.
Why Westmont Homes Are Different
Westmont is unincorporated LA County, not an incorporated city. That means every window and door permit must be pulled through LA County Building and Safety, not a city hall and not LADBS. Contractors who spend most of their week in Inglewood or Gardena routinely submit to the wrong jurisdiction, and the application sits unprocessed for weeks while the homeowner’s project stalls. The County Title 26 inspector assigned to Westmont follows a completely different schedule and code reference from city inspectors.
The housing stock compounds this. Stucco surrounds on 1950s tract homes frequently hide deteriorated flashing and failed moisture barriers behind the trim. When we remove an original aluminum window, we almost always find stucco repair in the scope. Summer temperatures climb into the mid-to-upper 80s°F without full marine-layer relief, so Low-E and thermally broken frames are functional upgrades, not add-ons. And the I-110 Harbor Freeway sits close enough that acoustic-rated glazing is a real quality-of-life decision for homes along the corridor.
Our Main Westmont Services
Two services dominate the calls we take from Westmont homeowners, and each has a dedicated page with full pricing detail.
Door Installation in Westmont
Most Westmont homes still have their original hollow-core exterior doors, which offer about as much thermal resistance as a single pane of glass. Door installation here usually involves replacing a lightweight slab with a solid-core or insulated unit, re-hanging it square, and addressing the stucco threshold damage that comes with seventy years of use. We measure every opening, write the scope, and hand you the price before any cutting starts. Door Installation in Westmont covers the full range of what we replace, from front entries to back doors and side gates.
Window Replacement in Westmont
The original aluminum windows in Westmont’s 1940s and 1950s tract homes were never designed for the heat that builds up 8 to 10 miles inland. Window replacement here means removing a single-pane unit set into stucco, repairing the surrounding moisture barrier, and installing a modern double-pane frame that actually holds a seal. We document every step with photos and leave the written survey with the homeowner. Window Replacement in Westmont has the per-opening pricing and what to expect from start to finish.
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.
BeforeAfterWindow Installation in Westmont
Window installation in Westmont almost always starts with the original 1950s aluminum frames, which were single-pane, uninsulated, and set directly into stucco without a proper moisture barrier. When summer pushes into the upper 80s°F and the I-110 hum never quite fades, those frames conduct heat and noise straight into the house. We install modern double-pane units with thermally broken frames, and the scope usually includes stucco repair around the opening because the old flashing has failed behind the trim. If you want the full service picture, Window Installation explains our process and product lines.
Single & Double Hung Windows
Signs you need it
The sash rattles in the frame when the wind picks up, or the pane fogs between the glass because the seal has failed.
What it costs in Westmont
Single and double hung window installation in Westmont typically runs $425 to $950 per opening depending on size and stucco condition.
How we do it
We measure the opening, remove the old sash and frame, repair the stucco surround, set the new unit square, and weatherproof the perimeter.
Horizontal Roller Windows
Signs you need it
The roller track has worn grooves that make the sash stick mid-slide, or the frame has pulled away from the stucco at the corners.
What it costs in Westmont
Horizontal roller window installation in Westmont typically ranges from $400 to $900 per opening, with wider units at the higher end.
How we do it
We pull the old frame, inspect the rough opening for rot, install the new roller track and sash, and seal against Westmont’s summer heat gain.
3-Panel Sliding (3-Lite Roller) Windows
Signs you need it
One or more of the three sashes no longer seals against the frame, leaving a visible gap that lets road noise from the I-110 corridor through.
What it costs in Westmont
Three-panel sliding window installation in Westmont typically costs $1,100 to $2,200 depending on width and whether the stucco surround needs repair.
How we do it
We template the full opening, remove the old three-track frame, install the new multi-lite unit, and foam-and-flash every joint.
What Window Installation Costs in Westmont
| Item | Typical range in Westmont |
|---|---|
| Single hung window, standard size | $425 - $750 |
| Horizontal roller window | $400 - $900 |
| 3-panel sliding window | $1,100 - $2,200 |
How long does window installation take in Westmont?
Most single-opening installations finish in one day including stucco repair. A full house of windows in Westmont, usually 8 to 12 openings on a tract home, takes two to three days. Call (509) 265-6387 for a written schedule with your quote.
Will the stucco around my windows need repair?
On 1940s through 1960s Westmont homes, yes in most cases. The original flashing behind the stucco surround has usually failed, and we scope the repair in the written price before we start. Call (509) 265-6387 to have your specific openings measured.
Impact Windows & Doors in Westmont
Impact windows and doors in Westmont solve two problems at once: the structural weakness of original 1950s single-pane frames and the noise signature of a neighborhood built along the I-110 Harbor Freeway corridor. Some Westmont homeowners assume impact-rated glass is only for coastal storm zones, but the same laminated interlayer that holds glass together under wind pressure also cuts transmitted sound significantly. We specify impact windows from PGT and CGI by performance tier, not by margin. If you want the full product breakdown, Impact Windows & Doors covers every grade we install.
Impact-Resistant Windows
Signs you need it
You hear freeway noise clearly through closed windows, or you want a window that stays intact if a branch or debris hits it during a wind event.
What it costs in Westmont
Impact-resistant window installation in Westmont typically runs $700 to $1,400 per opening depending on size and glass package.
How we do it
We measure the rough opening, order the laminated glass unit, install the heavier frame with reinforced anchors, and document the finished glazing.
Single Hung Impact Windows
Signs you need it
You want the classic single-hung look on a 1950s Westmont tract home but with a laminated glass unit that actually resists impact.
What it costs in Westmont
Single hung impact windows in Westmont typically cost $650 to $1,200 per opening, with stucco repair included when the surround has failed.
How we do it
We remove the original aluminum frame, repair the stucco return, set the impact-rated sash, and seal the frame with acoustically rated foam.
What Impact Windows & Doors Costs in Westmont
| Item | Typical range in Westmont |
|---|---|
| Impact-resistant window, standard size | $700 - $1,400 |
| Single hung impact window | $650 - $1,200 |
| Impact sliding glass door | $2,800 - $5,500 |
Are impact windows worth it in Westmont if I’m not on the coast?
For many Westmont homeowners, yes, because the laminated interlayer also reduces I-110 traffic noise and adds a security barrier that single-pane aluminum cannot match. Call (509) 265-6387 for a written price on your specific openings.
Do impact windows require different permits in Westmont?
Yes. Westmont falls under LA County Building and Safety, not a city hall, so the permit application goes to County Title 26 review. We handle the filing and bring the approved documents to the job. Call (509) 265-6387 for the specifics on your project.
Energy-Efficient Windows in Westmont
Energy-efficient windows in Westmont address a measured problem: the original aluminum frames from the 1950s conduct heat directly into the house during summer afternoons, and the single-pane glass does almost nothing to slow solar gain. With temperatures 8 to 10 miles inland regularly hitting the mid-80s°F and above, a Low-E coated double-pane unit changes what the air conditioner has to fight all afternoon. We quote every energy upgrade with a written U-factor and SHGC on the scope. For the full range of glass packages, see Energy-Efficient Windows.
Low-E & Argon Gas Glass
Signs you need it
Rooms on the west side of the house are noticeably hotter by 3 p.m. even with the air conditioning running.
What it costs in Westmont
Low-E with argon gas fills in Westmont typically adds $120 to $180 per window over standard double-pane glass.
How we do it
We spec the glass package by orientation, install the unit, and record the U-factor and SHGC on the written documentation you keep.
ENERGY STAR Replacement Windows
Signs you need it
Your energy bills climb every August, and the window frames are warm to the touch on hot afternoons.
What it costs in Westmont
ENERGY STAR replacement windows in Westmont typically run $500 to $1,100 per opening depending on size and frame material.
How we do it
We measure the opening, supply the certified unit with the label intact, install against the stucco surround, and photograph the finished installation.
What Energy-Efficient Windows Costs in Westmont
| Item | Typical range in Westmont |
|---|---|
| ENERGY STAR double-pane window | $500 - $1,100 |
| Low-E coating with argon gas fill | $120 - $180 per window (add-on) |
| UV-blocking glass upgrade | $90 - $150 per window (add-on) |
What U-factor should I look for in Westmont?
For Westmont’s inland summer heat, a U-factor of 0.28 or lower and an SHGC of 0.25 or lower on west-facing glass is a solid target. Call (509) 265-6387 and we’ll spec the right package per elevation in writing.
Do energy-efficient windows qualify for rebates in Westmont?
Some product lines qualify for utility or manufacturer rebates, but the eligibility depends on the specific glass package and the current program terms. We list any applicable rebate documents in your written scope. Call (509) 265-6387 to check yours.
Sliding & Patio Doors in Westmont
Sliding and patio doors in Westmont are almost always original to the 1950s tract build: lightweight aluminum frames with single-pane glass, worn roller tracks, and stucco returns that have cracked around the opening. The same heat gain that affects the windows pours through the larger glass surface of a patio door all afternoon, and the I-110 noise comes through with it. We replace the entire opening with an insulated frame and laminated or Low-E glass, and we scope the stucco repair before we start. Our full sliding door catalog is at Sliding & Patio Doors.
Patio Doors
Signs you need it
The door sticks halfway along the track, or the frame has corroded where it meets the stucco at the threshold.
What it costs in Westmont
Patio door replacement in Westmont typically runs $2,200 to $4,800 depending on width, glass package, and stucco threshold condition.
How we do it
We remove the old door and track, repair the threshold and stucco returns, set the new frame level, and hang the new panel square.
Sliding Glass Door Replacement
Signs you need it
The glass fogs between panes, the roller wheels no longer roll, or the door frame has pulled away from the house at the top corner.
What it costs in Westmont
Sliding glass door replacement in Westmont typically costs $1,900 to $4,200 depending on panel width and whether the stucco opening needs repair.
How we do it
We measure the full opening, source the replacement unit to fit, install the new track and panel, and document the completed seal.
What Sliding & Patio Doors Costs in Westmont
| Item | Typical range in Westmont |
|---|---|
| Standard sliding glass door | $1,900 - $4,200 |
| Patio door replacement with stucco repair | $2,200 - $4,800 |
| Impact sliding glass door | $2,800 - $5,500 |
Can you replace just the door panel and not the whole frame?
Sometimes, if the existing frame is square and the stucco surround is intact. We measure the opening and tell you in writing whether a panel-only replacement is possible or whether the full frame must come out. Call (509) 265-6387 for a survey.
How long does a sliding door replacement take in Westmont?
Most sliding door replacements in Westmont finish in one afternoon, including stucco and threshold repair when the opening is standard. Custom-width doors add one to two weeks for manufacturing. Call (509) 265-6387 for a written timeline.
Impact Garage Doors in Westmont
Impact garage doors in Westmont matter because the garage is typically the largest single opening in a 1950s tract home, and the original door was a thin panel of wood or uninsulated metal. In a neighborhood governed by LA County Title 26 rather than a city building code, wind-load compliance and impact ratings are specified by county requirements, not municipal ones. We install hurricane-rated and wind-load-tested doors with the paperwork to match. The full product breakdown lives at Impact Garage Doors.
Hurricane-Rated Garage Doors
Signs you need it
Your garage door bows inward during wind events, or you want a documented wind-load rating on file with your insurer.
What it costs in Westmont
Hurricane-rated garage door installation in Westmont typically runs $2,900 to $5,800 depending on door width and track configuration.
How we do it
We measure the garage opening, order the rated door with reinforcement struts, install the heavier track and hardware, and provide the wind-load documentation.
Garage Door Replacement
Signs you need it
The door panels have separated at the seams, the springs are visibly worn, or the door no longer seals at the bottom plate.
What it costs in Westmont
Garage door replacement in Westmont typically costs $1,800 to $4,500 depending on insulation, panel thickness, and motor replacement.
How we do it
We remove the old door and tracks, install the new panels and hardware, set the opener, and adjust the spring tension with a documented safety check.
What Impact Garage Doors Costs in Westmont
| Item | Typical range in Westmont |
|---|---|
| Standard garage door replacement | $1,800 - $4,500 |
| Hurricane-rated garage door | $2,900 - $5,800 |
| Wind-load code compliance retrofit | $600 - $1,200 |
Does LA County require wind-load testing on garage doors in Westmont?
LA County Title 26 requires wind-load compliance on certain garage door openings in Westmont depending on exposure and door size. We check the requirement against your specific opening and file the permit accordingly. Call (509) 265-6387 for a written determination.
Can I replace just the garage door panels?
Sometimes, if the track and hardware are still sound and the existing door is a common size. We inspect the full assembly during the survey and tell you in writing whether panel replacement or a full door replacement makes more sense. Call (509) 265-6387 to schedule the inspection.
Custom & Geometric Windows in Westmont
Custom and geometric windows in Westmont often show up as retrofit projects on 1950s tract homes where a previous owner added a sunroom, a front entry feature, or a gable-end opening that no stock window will fit. The original builder openings were standard, but fifty years of additions and remodels have changed that equation. We template every custom opening in place and order the glass to the actual sightline, not the nearest catalog size. The full custom glass range is at Custom & Geometric Windows.
Geometric & Shaped Windows
Signs you need it
A non-rectangular opening like a triangle, pentagon, or trapezoid has a failed seal or a frame that no longer holds the glass square.
What it costs in Westmont
Geometric and shaped window installation in Westmont typically runs $900 to $2,600 per opening depending on the number of facets and glass type.
How we do it
We take a physical template of the rough opening, order the glass to that exact shape, install with custom stops, and weatherproof the perimeter.
Arched & Curved Windows
Signs you need it
An arched window over a front entry has fogged between panes, or the curved frame has separated from the stucco at the spring line.
What it costs in Westmont
Arched and curved window installation in Westmont typically costs $1,100 to $3,200 per opening depending on radius and frame material.
How we do it
We measure the radius with a full-scale template, order the curved glass unit, install the new frame arcs, and document the finished sightline.
What Custom & Geometric Windows Costs in Westmont
| Item | Typical range in Westmont |
|---|---|
| Geometric or shaped window | $900 - $2,600 |
| Arched or curved window | $1,100 - $3,200 |
| Oversized custom opening | $2,000 - $5,000 |
Can you match a custom window shape on a 1950s Westmont home?
Yes. We template the existing opening exactly, so the replacement matches the original sightline rather than approximating it. Call (509) 265-6387 and we’ll measure the opening and write the price.
How long does a custom glass order take in Westmont?
Custom shapes usually take three to four weeks from template to installation because the glass is fabricated to order. Standard-size replacements can go in the same week. Call (509) 265-6387 for a written lead time with your quote.
Brands We Service in Westmont
We install and replace windows and doors from PGT, CGI, CWS, and ES Windows, specified by the performance tier the opening requires rather than by what is on the shelf. Parts for the common frame types on Westmont’s tract homes are stocked locally, and custom-glass orders typically turn around in three to four weeks. See our brands for the complete manufacturer lineup.
Pricing for Windows & Doors in Westmont, CA
| Service | Typical range in Westmont |
|---|---|
| Single & double hung window installation | $425 - $950 |
| Horizontal roller window installation | $400 - $900 |
| 3-panel sliding window installation | $1,100 - $2,200 |
| Impact-resistant window installation | $700 - $1,400 |
| ENERGY STAR replacement window | $500 - $1,100 |
| Sliding glass door replacement | $1,900 - $4,200 |
| Impact sliding glass door | $2,800 - $5,500 |
| Hurricane-rated garage door | $2,900 - $5,800 |
| Geometric or shaped window | $900 - $2,600 |
| Arched or curved window | $1,100 - $3,200 |
In Westmont, the biggest price driver is stucco condition around the original openings: 1950s surrounds with failed flashing add repair labor and material that a clean retrofit would not need. Every price we write includes the full scope before work starts, and the document you sign is the same document we work from.
Neighborhoods We Serve in Westmont
We work throughout Westmont’s residential blocks, from the streets east of Western Avenue to the homes along Vermont Avenue and the neighborhoods between West 103rd and West 112th Streets. Most of our Westmont jobs are within a 10-minute drive of our local scheduling node. We serve:
- Westmont East (east of Western Avenue)
- Westmont West (west of Vermont Avenue)
- The blocks along West Century Boulevard
- The Los Angeles Southwest College area
- Homes along West 108th Street
Service Area - Cities Near Westmont
From Westmont, our scheduling covers the surrounding area including Los Angeles, CA, where many Westmont homeowners work and commute. We also reach parts of San Diego, CA, San Jose, CA, and San Francisco, CA through our broader California service network. The same written-price-before-work-starts rule applies in every one of those markets.
Serving Westmont, CA - Our Local Coverage Area
We’re based in the Westmont 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 Windows & Doors in Westmont
We schedule Westmont jobs daily because the neighborhood sits inside our local service window. Most surveys happen within one to two business days of the call, and installations are scheduled from the written scope you approve. Call (509) 265-6387 to get on the calendar.
Most Westmont homes are not in HOAs, but a few pockets have association rules that govern window style and exterior appearance. We provide the spec sheets and drawings you need for any architectural review, and we confirm the approval is in hand before ordering glass. Call (509) 265-6387 for help with your specific block.
We do. Since Westmont is unincorporated LA County, every permit goes through LA County Building and Safety under Title 26, not through a city hall. We file the application, track the review, schedule the inspection, and hand you the approved documents with the finished job. Call (509) 265-6387 to start the process.
What happens when you call
- 1A real person answersNo phone trees - talk to a local windows & doors 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 Westmont Customers Say
"Replaced eight windows. They showed me the U-factor on the units they were actually fitting rather than the brochure numbers."
- Kofi B."They photographed the rotten sill they found under the old frame before replacing it, and the extra cost was agreed in writing before they carried on."
- Rosalind C."Front door install went smoothly. Written warranty, clear price, no pressure to upgrade anything."
- Nils H.