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 Installation Across Los Altos
Replacing windows in Los Altos is not a simple swap job. Most homes here sit on acreage, many on septic and well, and a large share are Eichler builds or mid-century ranches with original glass walls that have been failing for a decade. That means the work nearly always involves both city design review and county health sign-off before a single unit goes in. We know that path well. Our crews handle window replacement in Los Altos every week, and we scope the permitting, access, and structural work before we quote, so the price you get is the price you pay. Call (669) 333-7786 for a free estimate.
Why Westlight Windows San Jose Is Los Altos’s Preferred Window Installation Company
Los Altos homeowners get a raw deal from window contractors who think city permits are the whole story. Owen Satterfield has been running Westlight Windows San Jose since 2009, and our crews have worked on enough Eichler and ranch homes to know the county side matters just as much. We carry eight manufacturer lines, which matters in Los Altos because no two homes here are the same. A 1962 Eichler on Morton Avenue needs a different jamb depth and glass package than a 2005 custom build up in the hills. We match the product to the opening and to the design review standard the city will hold you to.
Every job includes the Kingswell Guarantee in writing: your price before work starts, a real arrival window, a clean job site, and a written guarantee on the completed work. If something fails within the guarantee period, we come back and fix it at no charge. That is the 365-Day Done Right Promise, and it applies to every window we install in Los Altos. We answer the phone with a live person 24/7, not a voicemail box.
Window Installers in Los Altos
Window installers in Los Altos handle full replacement of existing units, including removal of the old frame, prep of the rough opening, installation of the new window, insulation, flashing, and interior and exterior trim. Most replacement work in Los Altos runs $1,100 to $2,800 per window installed, depending on the product line, glass package, and what the opening looks like once the old frame comes out. A full home with 8 to 12 windows typically lands between $12,000 and $30,000 before any structural or access work.
Replacement on Acreage Lots
Los Altos acreage jobs come with long driveways, mature oaks, and sometimes no practical way to get a material lift near the house. When access is tight, we bring glass by hand-carry or a small tracked lift rather than forcing a crane onto a hillside. That adds labor but saves broken glass and torn-up landscaping.
Permits and Structural Retrofit
On Eichler and mid-century homes, the opening is often part of the structural post-and-beam grid. We check the load path before we order any window. If a larger or heavier unit is going in, we add structural reinforcement to the opening so the building still carries its loads the way the original engineer intended.
Casement Windows in Los Altos
Casement windows in Los Altos are a common replacement choice on 1950s and 60s ranch homes where the original steel or aluminum crank units have seized or lost their seal. A standard casement replacement in Los Altos runs $950 to $2,200 per window installed. Larger custom units on Eichler homes, especially those with laminated glass or impact-rated glazing, land at $1,800 to $3,800 each because the frame usually needs a custom jamb depth and structural work.
Why Casements Suit the Local Climate
Casement windows seal tighter than sliders, which matters during winter storms in Los Altos when wind-driven rain hits west-facing walls. The crank mechanism also lets you open the sash wide on hot summer afternoons when the delta breeze finally reaches the hills.
Design Review for Casement Replacement
If you are replacing a fixed window with a casement, or changing the material of the frame, Los Altos design review typically wants to see the proposed window before approving the alteration. We prepare the submittal drawings and handle that process as part of the job.
Trusted Brands We Service in Los Altos
Westlight Windows San Jose installs eight manufacturer lines, and for Los Altos we lean on three more than most: ViewLux for crisp modern lines on newer custom builds, PGT for impact-rated units where the design review board wants storm protection without a bulky profile, and ES Windows for the custom jamb depths that Eichler homes demand. Our Window Installation team keeps parts and hardware for these lines in stock, which means we do not wait on a manufacturer backorder when a Los Altos homeowner calls about a failed unit.
Common Window Installation Problems We See in Los Altos Homes
- Septic and well setbacks blocking a larger opening. Many Los Altos lots are on septic systems, and enlarging a window sometimes changes the distance to a leach field or the well head. We run the county health sign-off before framing so you do not pay for work that gets red-tagged.
- Mature landscaping limiting equipment access. Long driveways and mature oaks on acreage lots mean a material lift cannot always reach the opening. We scope access before we quote and price the hand-carry or small-lift labor honestly.
- Original Eichler glass walls failing at the frame. The floor-to-ceiling single-pane glass on many mid-century homes has a 60-year-old aluminum frame that is corroded or sprung. Replacing the unit means matching the jamb depth, not just dropping in a stock window.
- Structural posts cut to fit stock window sizes. We have seen Eichler homes where a previous contractor notched a post to make a standard unit fit. That compromises the load path and fails design review. We do not cut structural members. Period.
Pricing for Window Installation in Los Altos, CA
We Also Serve Cities Near Los Altos
Our Los Altos crews work throughout the northern Santa Clara County side of the peninsula. We regularly install windows in Mountain View, Stanford, Menlo Park, and Sunnyvale, including Eichler tracts and mid-century neighborhoods in each. Scheduling works the same way everywhere we go: a live person answers, you get a written price, and we show up in the window we gave.
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 Installation in Los Altos
Do I need a city design review for casement window replacement on a Los Altos Eichler?
Yes, if you are changing the frame material, the window type, or the visible dimensions of the opening, Los Altos design review typically requires a discretionary review. If you are replacing an existing casement with a new casement of the same size and similar material, the process is faster, but we still prepare and submit the required drawings. Call (669) 333-7786 and we can tell you which path your job likely falls under.
How do septic and well setbacks affect window installation on a Los Altos acreage lot?
When a window opening changes enough to alter the footprint of the structure or its relationship to a drain field or well, the county health department may require a setback review. We check the lot records before we quote. If the window you want pushes close to a leach line or well head, we adjust the plan so the replacement stays within the setback rather than triggering a variance. Call (669) 333-7786 with your address and we can look at the records for your specific lot.
Can impact-rated windows be installed in an Eichler’s thin post-and-beam frame?
Yes, but the opening often needs structural reinforcement first. Impact-rated glass is heavier and stiffer, and it transfers more wind load to the surrounding framing. On a post-and-beam house, that load path matters. We add reinforcement to the opening before the new unit goes in, which keeps the original look and passes design review. We install PGT and other impact-rated units in Los Altos Eichlers regularly.
Do Los Altos winter storms justify hurricane-rated glazing?
Los Altos is not in a hurricane zone, and most homes here do not need full hurricane glazing. What they do need is good weather sealing, low-E coatings to manage heat gain during the warm season, and glass that handles wind-driven rain. We offer impact-rated units like PGT and CGI for homeowners who want the strongest option, but for most Los Altos homes a high-quality insulated low-E unit is the right fit and a better use of budget.
How do you handle window installation when the only access is a narrow country lane?
We hand-carry or use a small tracked material lift when a crane or truck cannot reach the house. That adds labor cost, which we include in the written quote before work starts. We have done this on narrow lanes throughout Los Altos, including jobs where the only vehicle access was a single-lane gravel drive with mature oaks on both sides. Call (669) 333-7786 for a free estimate and we will scope your access in person.
Written by Owen Satterfield, Owner at Westlight Windows San Jose, serving Los Altos and the surrounding peninsula 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.