Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Custom Windows & Doors Across Los Altos Hills
Custom windows and doors in Los Altos Hills carry a set of requirements you will not encounter in Los Altos or Mountain View. Much of the town sits inside a Very High Fire Hazard Severity Zone, which means replacement windows and doors on qualifying remodels and additions must meet Wildland-Urban Interface standards under California Building Code Section 710A. That is not a county suggestion. It is a compliance checkpoint that fails expensive projects and forces costly reorders when it is ignored. TruePane Windows & Doors handles WUI-compliant glazing, custom sizing, and the town’s Architectural and Site Review process as standard procedure, not surprises. Call (888) 635-0804 to schedule a free estimate and get the spec right before you order glass.
Why TruePane Windows & Doors Is Los Altos Hills’s Preferred Custom Windows & Doors Company
Los Altos Hills is not a volume market. The homes are custom estates on acre-plus lots, the window openings are non-standard, and the town wants a say before the facade changes. We have worked through that process enough times to know where the delays actually come from, and we build the schedule around them. Dale Kessler founded this company on a simple rule: if the pane is not true, the job is not done. That standard applies to every Anderson E-Series unit we set on a ridge-top off La Paloma Road and every Marvin picture window we frame into a 1970s ranch off Purissima Road.
Customers in Los Altos Hills consistently tell us the same three things matter: someone who answers the phone, a price that does not move after the contract is signed, and a company that will still be here in twenty years. We have been serving Bay Area communities since 2008, and our Los Altos Hills customers get the same Keystone Standard as everyone else: both manufacturer warranty layers registered in writing, durations stated, before our truck leaves the driveway. Background-checked, uniformed technicians measure every opening twice and put quotes on paper in plain English. The Done Right Promise means if it is not done right, we make it right. No paperwork fights. No arguing.
Our Custom Windows & Doors Services in Los Altos Hills
Our Custom Windows & Doors team works almost exclusively in the high-end residential space here, where standard sizing is the exception and the view is the point. These are the services Los Altos Hills homeowners ask about most.
Oversized Glass Panels
Estate homes in Los Altos Hills were built to frame the Santa Cruz Mountains and the valley floor. That means glass units running eight, ten, sometimes fourteen feet in a single pane. Oversized glass in Los Altos Hills typically runs $3,800-$9,500 per opening installed, depending on whether the unit needs tempered glass, WUI-rated construction, or structural reinforcement for exposed-slope wind loads. Our crew handles the engineering, the permitting, and the install. You handle enjoying the view.

Architectural Grilles & SDLs
Simulated divided lites, or SDLs, give a custom window the look of individual panes without sacrificing energy performance. Los Altos Hills homeowners often ask us to match existing grille patterns on a partial replacement, which takes careful measurement and a manufacturer line that supports true divided lite matching. An SDL upgrade typically adds $180-$420 per window in Los Altos Hills. We quote Andersen, Marvin, and Pella side by side on paper so you can see exactly what the grille package costs before you commit.

Custom Shape Windows
Arched transoms, trapezoid gables, circular picture units: Los Altos Hills has plenty of all three. Custom shape windows in Los Altos Hills run $2,400-$6,800 per unit installed, and the lead time is the real story. A radius-top or trapezoid window is made to order, and the factory schedule does not care about your contractor’s promise date. We tell customers to plan for 12-18 weeks on these, more if the glazing needs WUI compliance. Anyone promising faster is guessing.

Curtain Wall Systems
Contemporary homes in Los Altos Hills, especially those built in the 1990s and later, frequently feature curtain wall systems: large expanses of glass held by a metal frame rather than individual punched openings. A curtain wall replacement or repair in Los Altos Hills requires an installer who understands thermal movement, drainage, and structural anchoring. Most jobs run $18,000-$60,000 depending on the span and whether the original system is salvageable. We have replaced failed curtain walls on Page Mill Road homes where seal failure had been ignored for a decade, and the fix required full glass replacement, not a caulk-and-pray patch.

What happens when you call
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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 are an authorized installer for more than a dozen manufacturer lines, and on Los Altos Hills jobs we lean on, and ES Windows for most custom work. For coastal-foothills exposure with high moisture cycling, we have also specified CGI and CWS where impact ratings and corrosion resistance matter. We keep common parts and hardware in regional stock, so a broken sash or failed operator does not have to wait on a factory order. Brand-name parts, installed straight, warrantied in writing.
Common Custom Windows & Doors Problems We See in Los Altos Hills Homes
Here is what we find when we walk a Los Altos Hills property for the first time:
- Seal failure accelerated by marine-layer moisture. The fog cycles through the Santa Cruz Mountain gaps almost daily, and the aluminum frames on 1960s-1990s homes were never designed for that kind of wetting-and-drying loop. By the time we arrive, the insulated glass units are typically fogged and the argon gas is long gone. The homeowners have been paying to heat and cool air that leaks straight through the glass.
- Non-WUI-rated glass on a remodel that already got approved. We see this too often in Los Altos Hills. A homeowner or out-of-town contractor orders standard dual-pane units, the compliance check flags them, and the glass has to be reordered with tempered, WUI-rated construction. The homeowner eats the cost of the first order. We spec WUI compliance up front so that reorder never happens.
- Corroded aluminum frames and failed flashing tape. The original single- or early dual-pane aluminum frames on Los Altos Hills homes weaken as the seals go and the moisture works through the jamb. A new window installed into a rotted rough opening voids the manufacturer warranty. We replace the corroded frame members and re-flash the opening before the new unit goes in.
- Lead time surprises on custom millwork and oversized IGUs. Custom wood window frames, oversized insulated glass, and architectural finishes for one-acre estate homes routinely run 16-24 weeks. Contractors who do not work Los Altos Hills regularly quote a six-week install, then go silent when the permit review adds another four to six weeks on top. We quote the true lead time in writing at the first visit so the calendar and the money match reality.
Pricing for Custom Windows & Doors in Los Altos Hills, CA
Custom window and door work in Los Altos Hills is not priced like a flatland tract-home job, and anyone who tells you otherwise is underbidding the spec. A single custom shape window runs $2,400-$6,800 installed. A full-height oversize picture unit framed for a valley view runs $3,800-$9,500 per opening. Architectural grilles and SDL packages add $180-$420 per window. A curtain wall replacement on a contemporary Page Mill Road home runs $18,000-$60,000. What drives the number: WUI compliance requirements, glass size, frame material, grille spec, and whether the town’s Architectural and Site Review process requires revisions. We write fixed pricing on the quote and we do not change it after you sign, unless you change the scope. Call (888) 635-0804 for a free, written, line-item estimate on your Los Altos Hills home.
Key Takeaways
- Los Altos Hills window and door replacements often require WUI fire-resistance compliance under CBC Section 710A.
- The town’s Architectural and Site Review process can add 4-6 weeks to a project, and skipping it risks a stop-work order.
- Custom lead times here run 16-24 weeks, not six. We quote the true schedule up front.
- Oversized glass, custom shapes, and SDLs are the norm in Los Altos Hills, not the upgrade.
- Fixed pricing in writing before we order. No change orders unless you change the scope.
We Also Serve Cities Near Los Altos Hills
Our crews work throughout the foothill and valley communities around Los Altos Hills, including Custom Windows & Doors in Los Altos Hills and the surrounding areas of Parkway, Arden-Arcade, Ladera Heights, and Commerce. If you are unsure whether we cover your street, call (888) 635-0804 and a live person will tell you straight.
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 - Custom Windows & Doors in Los Altos Hills
Not every replacement, but any qualifying remodel or addition within the Very High Fire Hazard Severity Zone must meet Wildland-Urban Interface standards under California Building Code Section 710A. The trigger is the project scope, not the window size. Work this into your plan before you order glass. Call (888) 635-0804 if your Los Altos Hills window job involves a remodel or addition, and we will tell you whether WUI compliance applies.
Typically four to six weeks, assuming documentation is complete and no revisions are requested. The process applies to exterior changes that alter appearance, which includes most window and door replacements in Los Altos Hills. We coordinate the submission and schedule the install around the review so your job does not sit in permitting limbo. Call (888) 635-0804 to discuss your timeline before you commit to a start date.
Because the glass is thicker, the unit is heavier, the engineering is more demanding, and the glazing often requires WUI-rated or impact-rated construction in Los Altos Hills. A 10-foot picture window is not a scaled-up standard window. It is a structural element that must handle foothill wind loads, thermal movement, and code compliance. We quote the true installed price on paper before anything gets ordered. Call (888) 635-0804 for a free, itemized estimate.
Yes, but not with the original material. The aluminum frames from that era lack thermal breaks and fail modern energy codes. We match the sightlines and profile using thermally broken aluminum or a manufacturer line that offers a slim-profile option in a near-identical finish. The look stays. The seal stops failing. Call (888) 635-0804 and we will show you samples at your Los Altos Hills home.
Someone quotes a six-week install, then discovery hits: WUI compliance, Architectural and Site Review, and a 16-24 week factory lead time for oversized glazing or custom millwork. The job ends up running six months and the homeowner is stuck. We identify those factors at the first visit and write a schedule that reflects them. Call (888) 635-0804 to get a real timeline for your Los Altos Hills project.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Los Altos Hills and the surrounding Bay Area communities.



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