New windows and doors improve comfort, cut energy bills and add long-term value to your home. Westlight Windows San Jose pairs proven product lines with our own installing crews for lasting performance - and a price we put in writing.
Choose your installer
The unit is half the job - the install is the other half. Our own background-checked crews measure, set, seal and insulate every opening, and they know the lines we quote inside and out because they install them every week.
Select the right products
Compare styles, materials and glass packages side by side until the fit is right for your rooms, your budget and your goals. The product-line comparison below is the place to start.
Prepare your home for install
Before install day we walk you through a short checklist - furniture pulled back, treatments down, a clear path to each opening - so install day is watch-it-happen, not scramble.
Compare the Lines We Quote
Every project is priced on the same lines, side by side - the price indicators below are relative, and your consultant shows exact numbers on your actual openings.
PGTThe line homeowners arrive naming - the most impact certifications in the industry$$$
- More impact certifications than any other line we quote
- WinGuard, EnergyVue and ClassicVue Max systems built for every wind zone
- 99% on-time delivery keeps your install date on the calendar
CGIThe heavyweight impact line$$$$$
- Large-missile impact ratings for the strictest wind zones
- Architectural-grade aluminum with commercial-depth frames
- The line we quote when protection is the whole point
CWSThe value pick$$
- Vinyl systems built to strict wind codes
- Strong energy packages at the friendliest price point
- The smart start for whole-home replacements on a budget
ESWSlim lines, big glass$$$$
- Narrow-sightline aluminum for modern elevations
- Oversized openings and floor-to-ceiling glass
- Impact-rated without the bunker look
ECOThe aluminum impact workhorse$$$
- Factory-built aluminum impact systems
- A strong price-to-protection ratio for coastal homes
- Proven inventory lines with short lead times
Fast, Reliable Window Replacement Across Los Altos
Window replacement in Los Altos typically costs between $900 and $2,800 per window installed, with Eichler and mid-century custom work running higher due to design review requirements and non-standard sizing. Most single-window projects wrap up in one day once materials arrive. If you’re calling from a 1960s ranch near Covington Road or an Eichler off El Monte Avenue, you already know the drill: Los Altos doesn’t let you just swap in any off-the-shelf unit and call it done. The design review board wants the frame profile, sightlines, and jamb depths to match what the original builder put in. That’s exactly the work we do. Call (669) 333-7786 for a free estimate, and we’ll walk the property with you before anything gets ordered.
Westlight Windows San Jose serves Los Altos as an independently owned and operated Kingswell location. Owen Satterfield leads our team, and we’ve been doing this since 2009. We know Fremont Avenue, we know the North Los Altos hills, and we know what the planning department will and won’t sign off on.
Why Westlight Windows San Jose Is Los Altos’s Preferred Window Replacement Company
Los Altos homeowners call us because we answer the phone. A live person picks up 24 hours a day, seven days a week. Not a voicemail tree. When you’re staring at a failed seal on a 12-foot Eichler slider and wondering whether the whole wall has to come out, you want a human voice, not a chatbot.
Our technicians are background-checked and uniformed. You’ll know exactly who’s walking through your door, and we show up in the window we gave you. That’s part of the Kingswell Guarantee, and it’s in writing on every job. We put the price in writing before any work starts, we commit to a real arrival window, we leave the site cleaner than we found it, and we hand you a written guarantee when the work is done. If something fails within the guarantee period, we come back and fix it at no charge. That’s the 365-Day Done Right Promise, and it’s automatic.
We’ve handled enough Eichler replacements in Los Altos to know what the design review board will flag before you submit. That local knowledge saves you months of re-orders and permit back-and-forth. Owen Satterfield has walked enough of these properties to know that a 1958 post-and-beam home off Springer Road needs a different approach than a 2015 custom build in the hills above Los Altos Hills.
Window Seal Repair in Los Altos
Window seal repair in Los Altos usually costs between $180 and $450 per sash, depending on whether the glass unit can be reglazed in place or the entire insulated glass unit needs replacing. A failed seal shows up as fogging or condensation between the panes that won’t wipe away. In Los Altos, we see this most often on west-facing glass, where afternoon sun cooks the sealant on original aluminum frames until the desiccant inside the unit gives out.
Repairing a seal is not the same as replacing the window. When the frame is still square, the hardware works, and the sightline matches what Los Altos design review approved, you don’t need a full replacement. You need a new IG unit.
Glass Unit Replacement Without Changing the Look
We can disassemble the existing frame, replace the failed sealed unit, and rebuild the sash to match the original profile. On Eichler and mid-century homes, this matters enormously. Los Altos design review will not approve a repair that changes the visible frame width or finish. We spec the glass to fit the original glazing pocket, not the other way around.
When the Seal Failure Is Actually a Frame Problem
Sometimes the seal didn’t fail on its own. A sagging post-and-beam header puts pressure on the glass, and no new IG unit will hold for long if the structure’s moved. We check for that before we order parts, because swapping glass into a twisted opening just means you’ll be calling us again in eighteen months.
Energy Efficient Windows in Los Altos
Energy efficient windows in Los Altos typically run $1,100 to $2,400 per opening installed, with low-e coatings, argon fill, and upgraded weather stripping included. Los Altos has a mild Mediterranean climate, so the goal isn’t keeping out a Minnesota winter. It’s cutting UV damage to interior finishes and stopping afternoon heat gain from turning west-facing rooms into ovens during our late-summer heat waves.
The right glass for Los Altos has a low SHGC, meaning it blocks more solar heat without blocking the view. That’s the whole point of living here. You want the glass wall, not heavy drapes pulled shut from 3 p.m. onward.
Low-E Glass with Real Numbers
We recommend glazing with an SHGC around 0.27 for west-facing glass. That cuts afternoon heat gain enough to make a measurable difference in cooling load without darkening the glass so much that you lose the mid-century transparency Eichler buyers pay a premium for. Low-e coating is a thin metallic layer that reflects heat back outward in summer and back inward in winter. It’s invisible once installed.
Weather Sealing for Older Ranch Homes
A 1950s ranch near Almond Avenue often has original casement windows with dried-out glazing putty and no modern flashing. Replacing just the sash without addressing the rough opening means air leaks at the jamb. We flash properly, install backer rod and sealant, and the difference in draft is immediate. This is standard practice on every job, not an upsell.
Trusted Brands We Service in Los Altos
We stock and install eight manufacturer lines, including PGT, CGI, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux. For Los Altos Eichler work, we lean hard on ES Windows for custom aluminum frame profiles and ViewLux for low-profile vinyl retrofits that mimic the original sightline. Therma-Tru covers entry doors when the project scope expands beyond glass. Because we carry this many lines, we match the product to the house instead of forcing the house to fit one brand. Parts and ordering don’t have to come from across the country. We know what’s in stock and what’s on backorder before we quote.
Common Window Replacement Problems We See in Los Altos Homes
- Design review rejects the wrong frame profile. Homeowners buy off-the-shelf windows that don’t match the original aluminum frame width, the city flags it, and the project sits for months. We spec the right profile before you ever talk to the planning department.
- Cutting into Eichler post-and-beam framing. Some contractors remove header material to fit a thicker window unit, and that compromises the shear capacity of the wall. We reinforce around the original glazing pocket instead of cutting into it.
- Air leaks at the jamb on ranch homes. Old casement openings weren’t flashed for modern replacement units. Without proper flashing and sealing, cold air drafts through the jamb. We fix the opening, not just the sash.
- Failed seals on west-facing glass. Afternoon sun in Los Altos will kill cheap sealant on original aluminum frames. We use sealants and IG units rated for high UV exposure, then back it with a written guarantee.
Pricing for Window Replacement in Los Altos, CA
We Also Serve Cities Near Los Altos
If you’re in Mountain View, Stanford, Menlo Park, or Sunnyvale, we do Window Replacement work there too, and the same Kingswell Guarantee applies: written price, real arrival window, clean site, written guarantee. Many of our Los Altos customers have investment properties or family in these nearby cities, and we’re happy to handle both properties under the same terms.
Serving Los Altos, CA - Our Local Coverage Area
We’re based in the Los Altos 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 Replacement in Los Altos
Yes, and this is one of the most common approvals we handle. Los Altos design review cares about the visible frame profile, not the glass package inside it. You can keep the original aluminum frame sightline and swap single-pane glass for a low-e insulated unit. The key is matching the glazing pocket depth and not widening the frame. We’ve done this repeatedly on Eichler sliders off Fremont Avenue and Springer Road. Call (669) 333-7786 to discuss your specific opening.
We reinforce around the original glazing pocket rather than cutting into the header. The post-and-beam frame carries shear load, and removing header material weakens the wall. Instead, we add structural elements outside the glazing plane, then install laminated glass that contributes to shear capacity without changing the frame sightline. On a 1962 Eichler off Fremont Avenue, our crew replaced a 12-foot-wide original sliding glass wall with ES Windows custom aluminum frame units, re-engineering the post-and-beam opening to accept laminated glass interlayer for structural shear while preserving the original 2-inch frame sightline and adding low-E glass with an SHGC of 0.27 to cut afternoon heat gain. Call (669) 333-7786 for an assessment of your wall.
Because Los Altos design review adds a layer of review that San Jose doesn’t have. Custom frame profiles, non-standard jamb depths, and architectural matching all take longer to spec and manufacture. In San Jose, a standard vinyl insert can be ordered from stock. In Los Altos, the window often has to be built to match a 1959 aluminum frame profile that hasn’t been manufactured off-the-shelf in decades. Lead times on Eichler replacements run six to ten weeks. We give you the honest timeline in writing before ordering, and the price is fixed at that point. Call (669) 333-7786 to start the conversation.
You can replace one sash, and in many cases that’s the right call. If the frame is square, the hardware still works, and the other sashes aren’t showing seal failure or air leaks, replacing the single broken unit is what we recommend. It costs less than a full window, and it keeps the rest of the original window intact. What we won’t do is sell you a full replacement you don’t need. Call (669) 333-7786 and we’ll give you an honest read on whether one sash makes sense.
We recommend an SHGC around 0.27 for west-facing glass. That blocks enough solar heat to keep the room comfortable during late-afternoon heat waves while still letting in the light and views that make Los Altos worth living in. You won’t need heavy drapes or shades pulled shut. The right low-e coating does the work invisibly. Exact SHGC depends on the orientation, overhang depth, and your cooling load, so call (669) 333-7786 for a specific recommendation on your home.
Los Altos Window Replacement, Done the Kingswell Way
West light is the late-afternoon sun that pours through a good window. Bright, warm, and worth doing right. That’s the idea behind everything we do. The Kingswell Way means five things, every single time. One: we say the price before the work. Two: we show up in the window we gave you. Three: we leave the place cleaner than we found it. Four: we put the guarantee in writing. Five: we come back if it fails. If the work isn’t right within the guarantee period, we return and correct it at no charge. No negotiating, no fine print.
That’s the deal we’ve offered Los Altos homeowners since Owen Satterfield started this company in 2009. It’s the same deal on every page, every job, every house. If you’re tired of no-shows, vague quotes, and contractors who disappear when the permit gets flagged, give us a call. We answer.
Call (669) 333-7786 for your free estimate today. A real person will pick up.
Written by Owen Satterfield, Owner at Westlight Windows San Jose, serving Los Altos since 2009.
Six Reasons Homeowners Choose Westlight Windows San Jose
Laminated glass and reinforced frames hold up to wind-driven rain, hail and flying debris, so your openings stay sealed when the weather turns.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Tighter seals and insulated glass even out hot and cold rooms and stop the drafts at the frame.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.