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
Most window and door replacement jobs in Los Altos Hills run between $1,200 and $4,500 per opening, with full-home projects typically ranging from $18,000 to $55,000 depending on fire-code glazing requirements and hillside access conditions. We’re Lightwell Windows & Doors, and every job we take in Los Altos Hills has to clear two hurdles most valley contractors don’t face: California’s WUI fire-safety codes and the Town’s own architectural review. Our crews carry CAL FIRE-compliant assemblies from CGI, CWS, and ES Windows, and we pull permits through the Los Altos Hills building department ourselves. Call (562) 478-8017 for a free written estimate.
Why Los Altos Hills Homes Are Different
Los Altos Hills sits almost entirely within a High or Very High Fire Hazard Severity Zone, which means standard residential windows and doors won’t pass inspection here. The Town’s building department enforces WUI codes at permit close-out, requiring multi-pane tempered or fire-rated glazing and fire-rated door units that flatland contractors in neighboring Los Altos or Mountain View never need to spec. We’ve seen crews spec standard vinyl frames and get tagged at final, forcing homeowners into expensive product swaps and re-inspection delays.
The housing stock reinforces this challenge. One-acre minimum zoning produced large custom homes, mostly mid-century ranch and California Modern styles built 1955 to 1980, many still running original aluminum or steel-frame single-pane windows. Newer estates on the ridgelines feature oversized curtain-wall glazing and clerestory windows positioned for Silicon Valley views, installations that demand precise structural load calculations and crane access.
Climate adds another layer. At 200 to 700 feet elevation in the Santa Cruz Mountain foothills, Los Altos Hills catches more marine fog and overnight moisture than the valley floor below. That accelerates seal failure and interior condensation in aging single-pane and early dual-pane units. Ridge-facing and canyon-edge homes also get channeled afternoon winds that chew through weatherstripping and hardware faster than flatland installations. We spec marine-grade sealants and reinforced hardware as standard on hillside jobs, not upgrades.
Our Main Los Altos Hills Services
Los Altos Hills homeowners call us for two core needs: upgrading failing original windows to fire-code-compliant assemblies, and installing new door systems that meet WUI standards while preserving architectural character. Each service has its own dedicated Los Altos Hills page with full details.
Window Replacement in Los Altos Hills
We replace original aluminum and steel-frame single-pane windows in mid-century ranches and California Modern homes throughout Los Altos Hills, upgrading to dual-pane tempered assemblies that satisfy WUI codes. Most of these jobs involve custom sizing for non-standard rough openings common in 1960s and 1970s construction, plus fire-rated glazing labels that the Town inspector verifies at final. We handle permit submission, architectural review coordination, and product selection from our eight manufacturer brands. Window Replacement in Los Altos Hills
Window Installation in Los Altos Hills
New window installation in Los Altos Hills typically serves custom estates with oversized curtain-wall glazing, clerestory banks, or picture windows oriented to capture hillside views. These installations require structural engineering review for wind loads on exposed ridgelines, plus crane or boom-lift access for large-format units that won’t fit through standard doorways. We coordinate engineered drawings, Town permit review, and manufacturer-specific installation protocols for each brand. Window Installation in Los Altos Hills
Door Installation in Los Altos Hills
Door installation here means fire-rated entry systems and WUI-compliant patio doors that meet CAL FIRE assembly requirements, not just the slab. Many Los Altos Hills homes have custom-milled entry surrounds that we protect during removal, and hillside settling over decades often requires jamb reconstruction before the new unit seats properly. We pull permits, schedule Town inspections, and ensure the final assembly carries the proper fire-rating label for your zone. Door Installation in Los Altos Hills
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 stock and install products from eight manufacturers, with local inventory for CGI, CWS, and ES Windows fire-rated lines that Los Altos Hills permits most commonly require. Most standard-size WUI-compliant units ship within two weeks; custom large-format curtain-wall orders from ECO Window Systems typically run four to six weeks. See our brands for full specifications and warranty details.
Pricing for Window Company in Los Altos Hills, CA
| Service | Typical range in Los Altos Hills |
|---|---|
| Standard window replacement (per opening) | $1,200 – $2,800 |
| Fire-rated window replacement (per opening) | $2,200 – $4,500 |
| Large-format picture window replacement | $3,500 – $8,500 |
| Clerestory window installation | $1,800 – $3,200 |
| Curtain-wall section (per linear foot) | $450 – $750 |
| Standard entry door replacement | $1,800 – $3,500 |
| Fire-rated entry door assembly | $3,200 – $6,000 |
| Patio door replacement (WUI-compliant) | $2,800 – $5,500 |
| Full-home window project (12-20 openings) | $18,000 – $38,000 |
| Full-home with large-format custom glazing | $35,000 – $55,000 |
| Crane/boom-lift rental (hillside access) | $800 – $2,200 |
| Permit and inspection fees (Town of LAH) | $400 – $900 |
Prices in Los Altos Hills run higher than valley-floor neighbors for two reasons: fire-rated glazing assemblies cost 40-60% more than standard residential equivalents, and hillside access often requires specialized equipment or additional crew for safe material handling. We put every price in writing before work starts, with line-item breakdowns, and that written price doesn’t change unless you add scope.
Neighborhoods We Serve in Los Altos Hills
Our crews work throughout Los Altos Hills, from the canyon-edge homes along Page Mill Road to the ridgeline estates above Interstate 280. Most appointments are scheduled within three to five business days, with permit-ready jobs moving faster once Town architectural review clears.
- Westridge (ridge-facing, high wind exposure)
- Page Mill corridor (canyon-edge, moisture-heavy)
- Robleda Road area (mid-century ranch concentration)
- Altamont Road estates (custom modern, large-format glazing)
- Golden Oak Drive (mixed vintage, varied access)
Service Area – Cities Near Los Altos Hills
Dispatch and scheduling for Los Altos Hills jobs are coordinated from our San Francisco Bay Area office, with crews serving the broader region including San Jose, CA, San Francisco, CA, and south to Los Angeles, CA and San Diego, CA for larger multi-home projects. Most Los Altos Hills homeowners never need to travel; we come to you for measurements, product samples, and final walkthrough.
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
Most window and door permits clear in two to three weeks if WUI-compliant product data sheets are submitted complete the first time. Incomplete submissions trigger correction cycles that add two weeks or more. We handle all submission paperwork and respond directly to Town comments to keep your job moving. Call (562) 478-8017 to check current permit timelines.
Exterior alterations visible from the street typically require Los Altos Hills architectural review, even for like-for-like replacements. Rear and side-yard windows not visible from public roads sometimes bypass this step. We verify your property’s review requirements before quoting so there are no permit surprises after work starts. Call (562) 478-8017 and we’ll check your specific location.
Yes. Our technicians follow C.A.R.E. values on every visit: Clean up like it’s our own home; Ask before we move or touch anything; Respect the family’s time and quiet hours; Explain the price before the work. We use pet-safe caulk and sealants where alternatives exist, schedule loud cutting outside nap windows when possible, and send a photo of the cleaned space before we leave. Call (562) 478-8017 to schedule around your household routine.
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
"Quiet, considerate install of several windows. They cleaned the glass and the sills and vacuumed every room. You'd never know a crew had been through. House is quieter and brighter."
- Brent Sakamoto"New patio slider. Clean install, they protected the floor and hauled off the old door. Quiet, polite crew that worked around my work calls without complaint."
- Andre Bellamy"They replaced a big foggy picture window. Careful with the furniture, laid down protection, and left no mess at all. Calm and respectful crew, and the view is clear again."
- Teresa Okafor