Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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Westlight Windows & Doors is the window company Lafayette homeowners call when their 1960s ranch windows rattle in the afternoon heat or a hillside home needs Chapter 7A-compliant replacements to pass permit review. We install windows and doors across Contra Costa County from our Bay Area dispatch office, and we carry eight manufacturer lines so the product actually matches the house, not the other way around. If you’re pricing replacement windows in Lafayette, call (903) 354-7134 and we’ll give you a written number before any work starts.
Why Lafayette Homes Are Different
Lafayette sits in a thermal basin past the Caldecott Tunnel, where summer afternoons run 20 to 35 degrees hotter than Berkeley or Oakland on the same day. That inland heat, with no marine layer to soften it, is why we recommend dual low-E glazing (a thin coating that reflects heat back out in summer) for even modest ranch homes near the valley floor. The daily temperature cycle also accelerates failed seals in older double-pane units faster than you’d see in coastal towns, so fogged glass between the panes is a common call for us here.
The hillside neighborhoods change the conversation entirely. Large portions of Lafayette’s upper ridges near the Lafayette Reservoir and the Reliez Valley fall inside California’s designated Fire Hazard Severity Zones. Any window or door replacement in those zones must comply with Chapter 7A of the California Building Code, which requires multi-pane tempered glazing, ignition-resistant or non-combustible frames, and ember-resistant construction details. We regularly see permits flagged for a Chapter 7A compliance review before the building department will move forward, and we factor that into the estimate from day one so you’re not ordering a product twice.
Our Main Lafayette Services
Most Lafayette homeowners reach out for one of three things: replacing old single-pane aluminum sliders, installing windows in a new build or remodel, or upgrading entry and patio doors. Each service has its own page with specifics, pricing, and local details.
Window Replacement in Lafayette
Most Lafayette homes were built in the 1950s through the 1970s with single-pane aluminum sliders and casements that leak cool air straight through the frame. Replacing them with low-E dual or triple-pane units cuts summer heat gain and quiets street noise from Moraga Road. On hillsides, we handle the Chapter 7A tempered glass and non-combustible frame requirements as part of the estimate. Get full pricing and product options on our Window Replacement in Lafayette page.
Window Installation in Lafayette
New construction and remodel window installation in Lafayette means working with irregular rough openings on custom hillside builds from the 1970s and 1980s, where almost nothing is square and sill angles vary by the inch. We match the right product line to the structural requirements, whether that’s a thermally broken aluminum frame for a contemporary Ridgeway home or a wood-clad unit for a ranch remodel. Details on frame types, installation schedules, and pricing are on our Window Installation in Lafayette page.
Door Installation in Lafayette
Lafayette door installation jobs range from front entry doors that need to seal against the Diablo winds to patio doors connecting older ranch homes to their backyards. We install Therma-Tru entry doors and ViewLux patio doors, with weatherstripping and thresholds spec’d for inland heat and fall wind. On hillside properties, doors can also fall under Chapter 7A ember-resistance rules, and we account for that in the written price. See our Door Installation in Lafayette page for line-item costs.
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 Lafayette
We install PGT and CGI impact-rated windows, plus CWS and ES Windows for custom and architectural needs. Parts for common PGT and Therma-Tru products are typically available within days, not weeks. See the full lineup on our brands page.
Pricing for Window Company in Lafayette, CA
| Service | Typical range in Lafayette |
|---|---|
| Single-window replacement (standard size, vinyl or aluminum) | $700 - $1,300 installed |
| Single-window replacement (wood or premium frame) | $1,200 - $2,500 installed |
| Standard sliding patio door replacement | $1,800 - $3,500 installed |
| French door replacement | $2,500 - $5,000 installed |
| Front entry door replacement (mid-grade) | $2,000 - $4,000 installed |
| Chapter 7A-compliant window package (per window premium) | $150 - $400 extra per window |
| Full-home window replacement (10-15 windows, mid-grade) | $12,000 - $25,000 installed |
| Custom hillside rough-opening refit (per window) | $80 - $200 extra per opening |
What pushes a Lafayette price higher is geography and code. Hillside homes with irregular rough openings and Chapter 7A fire-zone requirements add material and labor costs that a flatland tract house won’t see. Whatever the number, you’ll have it in writing before the crew arrives, and that’s the price you pay.
Neighborhoods We Serve in Lafayette
We work throughout Lafayette, from the ranch-heavy valley floor to the custom hillside builds along Reliez Valley Road, the slopes around the Lafayette Reservoir, and the older neighborhoods off Moraga Road. Our crews are local to the area and typically schedule initial measurements within a few business days.
- Downtown Lafayette and the valley floor
- Reliez Valley
- Happy Valley
- Burton Valley
- Upper hillsides near the Lafayette Reservoir
Service Area – Cities Near Lafayette
Beyond Lafayette, Westlight serves the surrounding Contra Costa corridor. We’re in Walnut Creek, CA for subdivision homes and mid-century tracts, Orinda, CA for hillside properties with similar fire-zone requirements, Moraga, CA for ranch homes and new custom builds, and Pleasant Hill, CA for 1960s and 1970s neighborhoods with aging aluminum frames.
Serving Lafayette, CA - Our Local Coverage Area
We’re based in the Lafayette 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 Lafayette
We usually schedule measurement visits in Lafayette within a few business days, and you’ll get a written price at that visit or shortly after. Call (903) 354-7134 and a live person answers, 24/7, to book the appointment.
Yes, in many cases. Homes inside California’s Fire Hazard Severity Zones, including parts of the Lafayette Reservoir area and upper Reliez Valley, require Chapter 7A compliance review before the permit clears. We build that requirement into the estimate from the start so you’re not surprised mid-project.
We can, because we carry eight manufacturer lines and aren’t locked into one brand’s proportions. For 1950s and 1960s aluminum sliders, we’ll recommend a modern frame that fits the opening and performs far better under Title 24 energy standards without losing the original look.
Ready to price it out? Call (903) 354-7134 for a free, written estimate, and we’ll show you exactly what the job costs before any work begins.
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 Lafayette Customers Say
"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"Our sliding patio door had come off its track years ago and we just lived with it. New one is smooth as butter. They hauled off the old one and vacuumed up before they left."
- Jessica Landry"Replaced eight drafty old windows that were basically single pane. The house is warmer already and the street noise is way down. Crew was on time both days and the price was exactly the quote."
- Harold Bemis