Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterWindow Company in Los Altos Hills, CA
Westlight Windows & Doors is the window company Los Altos Hills homeowners call when original 1960s glazing fails, when a Chapter 7A fire-code inspection looms, or when fog-driven rot has finally claimed a wood frame. Large custom estates on acre lots dominate this town, and most were built with single-pane glass that was never meant to last fifty years. We carry eight manufacturer lines including impact-rated PGT and fire-rated CWS, and every Los Altos Hills job starts with a written price before any work begins. Call (903) 354-7134 to schedule a free estimate.
Why Los Altos Hills Homes Are Different
Los Altos Hills sits in the foothills above the valley floor, and that elevation changes everything about window and door work here. Nighttime temperatures swing harder than they do in Los Altos or Mountain View, which stresses insulated glass seals and shortens their life. Coastal fog and wind hit south- and west-facing elevations directly, and over thirty or forty years that moisture works its way into original wood frames until rot sets in. We see this constantly on the 1950s through 1970s mid-century modern estates that make up so much of this town, homes with floor-to-ceiling single-pane windows and wide sliding glass walls now reaching the end of their service life.
The other piece that makes Los Altos Hills different is fire code. Much of the town falls within CAL FIRE’s Very High Fire Hazard Severity Zone, which triggers California Building Code Chapter 7A requirements on permitted window and door replacements. Dual-pane tempered glass and fire-rated frames are mandatory, not optional. Contractors who rarely work in the hills will spec beautiful products that pass energy review and then fail the WUI inspection, which costs the homeowner weeks of delay. We check the VHFHZ boundary before we spec anything, because in Los Altos Hills that boundary determines which products are even legal to install.
Our Main Los Altos Hills Services
Window replacement and door installation account for most of the calls we field from Los Altos Hills homeowners, and each has its own dedicated page with local pricing and Los Altos Hills-specific details.
Window Replacement in Los Altos Hills
Replacing windows in Los Altos Hills usually means pulling out original single-pane units from a mid-century modern or 1980s custom build and installing dual-pane, low-e glass that meets both Title 24 and Chapter 7A fire code. We’ve replaced entire walls of clerestory glazing on hillside estates, and we know which manufacturer lines carry the fire ratings your permit requires before the permit is even pulled. Most full-home replacements here take one to two weeks depending on window count and access. Read the full breakdown on our Window Replacement in Los Altos Hills page.
Window Installation in Los Altos Hills
New-construction and addition window installation in Los Altos Hills runs into the same code reality as replacement work: if the parcel sits inside the VHFHZ boundary, the windows must be Chapter 7A compliant before rough framing is finalized. We work with homeowners and their general contractors during the Architectural and Site Review process so the specified glass passes the first time. Fog exposure on west-facing elevations means we also recommend low-e coatings matched to the specific orientation of each wall. Details are on our Window Installation in Los Altos Hills page.
Door Installation in Los Altos Hills
Entry doors and sliding glass walls in Los Altos Hills take a beating from wind and nighttime moisture, especially on west-facing elevations. We install Therma-Tru entry systems and replace failed aluminum sliders from the 1980s and 1990s with modern units that seal properly and meet current energy code. The Chapter 7A requirement applies to doors as well as windows on VHFHZ parcels, so fire-rated frame and glass selections are part of every quote we write here. See specifics on our Door Installation in Los Altos Hills page.
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.
Brands We Service in Los Altos Hills
We install CWS, ES Windows, CGI, and ECO Window Systems products in Los Altos Hills, chosen because each line offers options that meet Chapter 7A fire-resistance requirements without sacrificing the clean sightlines mid-century modern homes demand. See the full lineup on our brands page.
Pricing for Window Company in Los Altos Hills, CA
| Service | Typical range in Los Altos Hills |
|---|---|
| Single standard window replacement | $800-$1,400 installed |
| Floor-to-ceiling fixed window replacement | $1,800-$3,200 installed |
| Clerestory window replacement | $1,200-$2,400 installed |
| Sliding glass wall replacement | $3,500-$7,500 installed |
| Aluminum sliding door replacement | $2,200-$4,200 installed |
| Entry door replacement | $1,600-$3,400 installed |
| Full-home window replacement (8-12 windows) | $12,000-$25,000 installed |
| Full-home window replacement (20+ windows, custom estate) | $30,000-$60,000+ installed |
| Chapter 7A fire-rated window upgrade | $1,200-$2,200 per window installed |
| Dual-pane tempered glass replacement (single lite) | $500-$900 installed |
Prices in Los Altos Hills run higher than the valley floor because Chapter 7A compliance adds real cost to materials, and steep hillside access often requires extra equipment and staging time. What doesn’t change is our process: you get a written price before any work starts, and that price does not move at the door.
Neighborhoods We Serve in Los Altos Hills
We work across Los Altos Hills, from the estates off Natoma Road and the parcels above Purissima Road to the hillside homes along La Paloma Road and the properties near the Los Altos Hills Country Club and Hidden Villa. Crews are in the area regularly throughout the week.
- Natoma Road area
- Purissima Road corridor
- La Paloma Road hillside
- Near Los Altos Hills Country Club
- Hidden Villa vicinity
Service Area – Cities Near Los Altos Hills
Westlight Windows & Doors serves Los Altos Hills as part of a broader Bay Area footprint. We also work in San Jose, CA, San Francisco, CA, and down the coast in Los Angeles, CA and San Diego, CA. Scheduling is coordinated from our Bay Area office, and Los Altos Hills jobs are handled by crews familiar with foothill conditions.
Serving Los Altos Hills, CA - Our Local Coverage Area
We’re based in the Los Altos 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 About Window Company in Los Altos Hills
Yes. Los Altos Hills requires permits for window and door replacements, and if your parcel falls inside the VHFHZ boundary, the work must comply with Chapter 7A fire-resistant construction standards. The town’s Architectural and Site Review process also applies to many exterior changes. Call (903) 354-7134 and we can help you understand what your specific property requires before you commit to anything.
Most full-home replacements in Los Altos Hills take one to two weeks, depending on window count, glass type, and hillside access. Custom estate homes with twenty or more windows can run longer. We provide a written arrival window and a committed schedule before work begins, and we leave the site cleaner than we found it.
No. Every Los Altos Hills job gets a written price before any work begins, and that price holds. If we find hidden rot or code issues during the job, we document it, explain it, and get your approval in writing before proceeding. There are no revised invoices at the door. Call (903) 354-7134 for a free estimate with the exact number in writing.
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 Los Altos Hills Customers Say
"Our energy bill in summer was brutal. New windows made a real dent in it. Salesman wasn't pushy and didn't do the fake "today only" discount thing the others tried."
- Bethany Oh"Two bedroom windows that never opened and one that wouldn't stay up. All replaced in an afternoon. The crew was clean, hauled off the old frames, and the quote held."
- Colette Rhee"Got quotes from three companies. Westlight wasn't the cheapest but they were the only one who measured everything carefully and put it all in writing. Worth it. No surprises on install day."
- Craig Dillard