Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Impact Windows & Doors Across Los Altos Hills
Impact windows and doors in Los Altos Hills typically run $1,800 to $6,500 per opening installed, depending on sizing, frame material, and whether the opening must satisfy both WUI fire-safety and town Architectural and Site Review requirements. Most replacements take two to four days on site, with the permit path adding two to six weeks before work begins. If you’re weighing impact-rated glazing for a ridge-top estate or a 1970s ranch on a one-acre lot, call (888) 635-0804 and we’ll walk you through what your specific house actually needs – before any quote is written.
We work in Los Altos Hills regularly. We know the dirt, the drive, the planning desk. And we know that what makes sense in Mountain View or Sunnyvale often will not pass review here. That local knowledge matters more than most people realize until the stop-work order shows up.
Why TruePane Windows & Doors Is Los Altos Hills’s Preferred Impact Windows & Doors Company
We’re not the cheapest bid in Los Altos Hills, and we don’t chase that business. The homeowners who call us have usually been through one bad install already: a fogged seal nobody warranty-registered, a slider that binds every July, a contractor who vanished after final payment. They want a company that will still answer the phone in ten years. That’s us.
Dale Kessler founded TruePane in 2008 on a rule that still sits on the whiteboard in our shop: if the pane is not true, the job is not done. We’re a second-generation glazier’s company, not a franchise playbook. Every crew member is background-checked, uniformed, and trained to measure every opening twice. We register both manufacturer warranty layers in writing before the truck leaves your driveway. If it’s not done right in the first 90 days, we make it right. No paperwork fights. No fine print that covers neither.
Our Los Altos Hills customers call us because the town’s review process punishes sloppy paperwork, and our office handles the permit path as carefully as the glass. We’ve completed Impact Windows & Doors projects across town – off La Paloma Road, up in the foothill ridges, down near the town line, and along the quieter stretches of Elena Road and Stonebrook Drive. A live person answers our phone 24 hours a day, seven days a week. That’s not a marketing line. Call at 2 a.m. and a human picks up.
Our Impact Windows & Doors Services in Los Altos Hills
Hurricane Impact Windows
A full impact window package on a Los Altos Hills estate usually runs $2,200 to $6,200 per window for custom-sized, impact-rated units with laminated glass and heavy-duty frames. Most homes here need non-standard sizing, because 1960s through 1990s custom builds rarely used off-the-shelf openings. We measure every opening twice, quote manufacturer lines side by side on paper, and order accordingly. No guessing, no “close enough” framing.

Impact Sliding Glass Doors
Impact-rated sliding glass doors in Los Altos Hills typically run $3,500 to $9,500 installed. That range accounts for the oversized multi-panel systems common on estate homes with big view walls. We stock and install PGT, CGI, and ES Windows lines, and we coordinate the flashing tape and anchor schedules with the town’s fire-hardening inspector when the property sits in a Very High Fire Hazard Severity Zone. A slider that passes wind load but leaks at the frame is a failed slider. We don’t leave until the door tracks square and the weatherstripping seats tight.

Impact Entry & French Doors
Impact entry and French door systems in Los Altos Hills, CA typically run $2,800 to $7,500 per opening. That figure covers the heavier laminated glass, upgraded hardware, and flush thresholds that Los Altos Hills’s Architectural and Site Review board often requires on front-facing facades. We handle the town sign-off as part of the quote, not as an afterthought. Skipping that step makes a six-figure mistake, which is precisely the kind of thing a homeowner should never have to learn firsthand.

Impact Garage Doors
Impact-rated garage doors for Los Altos Hills homes typically run $4,000 to $12,000 for oversized three- and four-car bays on estate lots. The doors are braced differently from standard residential garage doors, and on exposed ridge-top properties, wind-mitigation anchoring is a code requirement, not an optional upgrade. We use vacuum-assisted lifters and careful staging on tight driveway aprons, which matters when there’s no street parking and the neighbors have already called the town about construction noise twice.
We also handle Impact Windows & Doors in Los Altos Hills beyond these three categories: hurricane shutters, wind mitigation upgrades, and full code-compliance documentation for resale or insurance reviews. If it involves glass that needs to survive a storm and a fire inspector’s eye, we do it.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Los Altos Hills
We’re an authorized installer for more than a dozen manufacturer lines, including PGT, CGI, and ES Windows. When a Los Altos Hills homeowner needs impact-rated glazing sized for a 1973 ranch or a 1990s contemporary, we put two or three manufacturer options on paper side by side, with actual line-item prices. No “premium upgrade” hand-waving, no vague “high-end lines.” You see exactly what you’re buying, what each warranty covers, and how long each layer runs. We carry common hardware and glass for local service visits, which keeps repair turnaround faster than waiting on a distributor truck from Sacramento.
Common Impact Windows & Doors Problems We See in Los Altos Hills Homes
- Seal failure showing up early. Daily coastal marine layer fog rolls through the foothills and cycles moisture into aging aluminum frames. We routinely replace insulated glass units on Los Altos Hills homes where the sash still works fine, but the glass is clouded beyond saving. It happens faster here than on the valley floor.
- Original 1960s-1990s frames at the end of their life. Most custom and semi-custom estates in town still carry their original single-pane or early dual-pane aluminum windows. The tech boom built these houses; the frames are now past their service life, and impact retrofits require full-frame replacement rather than pocket inserts.
- Architectural and Site Review surprises. A homeowner swaps two front-facing windows without town sign-off. The town issues a stop-work order and mandates restoration of original materials. We see this every few months, and the fix always costs more than the permit would have. We file the review paperwork before the first pane is ordered.
- Ridge-top wind loads racking under-anchored frames. The glass survives the storm. The frame leaks or racks out of square. On exposed-slope properties off La Paloma Road and similar ridge lines, we always fusion-weld the corners and run full-perimeter flashing tape. If the frame isn’t anchored for the actual wind load at your elevation, it doesn’t matter how strong the laminate is.
Pricing for Impact Windows & Doors in Los Altos Hills, CA
Here’s what impact-rated work actually costs in Los Altos Hills, based on the jobs we’ve quoted and completed recently:
- Single impact window replacement: $1,800 - $3,400
- Custom oversized impact window (view glass): $3,000 - $6,500
- Impact sliding glass door (standard 2-panel): $3,500 - $6,000
- Impact sliding glass door (multi-panel, estate scale): $6,500 - $9,500
- Impact entry or French door: $2,800 - $7,500
- Impact garage door (code-anchored): $4,000 - $12,000
- Insulated glass unit replacement in existing impact frame: $450 - $1,200 per sash, depending on size and gas fill
What moves the number: opening size, frame material, whether the property sits in the WUI fire zone and needs CBC Section 710A compliance, and what the town’s Architectural and Site Review board requires for the facade. We give written line-item quotes. No change orders mid-job. No “we found rot” phone calls that triple the price. Call (888) 635-0804 and schedule a free estimate – a real person answers.
We Also Serve Cities Near Los Altos Hills
Our crews cover Los Altos Hills plus the neighboring communities of Parkway, Arden-Arcade, Ladera Heights, and Commerce. If you’re just outside town and dealing with the same coastal-marine-layer moisture cycling and aging aluminum frames, our service area reaches you. We dispatch from our San Francisco Bay Area office with local crews who know these streets.
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 - Impact Windows & Doors in Los Altos Hills
No, Los Altos Hills does not require impact-rated glazing on every home. The requirement applies to properties within the Very High Fire Hazard Severity Zone, where exterior window and door replacements must meet WUI fire-resistance standards under CBC Section 710A. On those properties, impact-rated laminated glass often satisfies both the fire-hardening requirement and provides storm protection in one product. Homes outside the fire zone can still choose impact glazing voluntarily, and many owners do, given the ridge-top wind exposure across much of the town. Call (888) 635-0804 and we’ll check your specific parcel’s zoning before you spend a dollar on glass.
Every exterior window or door change that alters appearance must go through the town’s Architectural and Site Review process, which typically adds two to six weeks between quote approval and the start of installation. We prepare the submittal, coordinate the hearing or administrative review, and build that timeline into your schedule from day one. If a contractor skips the review, the town can issue a stop-work order and require restoration of the original materials. Our office handles the paperwork, so you’re not calling the planning desk on your lunch break. We’ll be there when we say, with the permit in hand.
Yes, in many cases. If your impact frame is still square and the hardware is solid, we can replace just the insulated glass unit for roughly $450 to $1,200 per sash, depending on size and gas fill. That’s a common repair in Los Altos Hills where daily fog cycling from the Santa Cruz Mountain gaps clouds the glass long before the frame fails. We measure the sash, order the matching laminate and spacer, and install it without disturbing the surrounding flashing. If the frame shows corrosion or racking, we’ll tell you honestly and quote full-frame replacement instead. A square deal on the actual condition of the window, not an upsell.
Yes, but modestly. Impact-rated windows in Los Altos Hills usually carry low-E coatings and heavy-duty laminated glass that cut solar heat gain on those big western-facing view walls, though the real energy benefit comes when they replace failed dual-pane units that are already leaking conditioned air. On a ridge-top estate with oversized fixed picture windows, you’re not going to cut your PG&E bill in half, but you will stop paying to heat and cool a house through windows that were never designed for today’s code. If energy performance is the priority, we quote the manufacturer’s performance specs on paper next to the impact rating, so the numbers are in front of you.
We plan for it before the quote. On a ridge-top estate off La Paloma Road, our crew staged materials on a narrow driveway apron and used vacuum-assisted lifters to avoid crane access entirely. Los Altos Hills lots are often steep, with no street parking and driveway approaches that won’t fit a large panel truck. We send a smaller material vehicle, stage glass in sequence, and coordinate with you and your neighbors about access and work hours before the crew arrives. If the lot access is too tight, it affects the quote, and we’ll tell you that upfront rather than discovering it on install day.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Los Altos Hills and the surrounding foothill communities.



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