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CGI Construction in Los Altos Hills, CA | Ashford Contractors
We provide independent CGI window and door service throughout Los Altos Hills and nearby communities, from full impact window installations to targeted hardware and seal repairs. If you need CGI repair in Los Altos, we cover that too. The one thing that separates our CGI work here from every other town is this: nearly every window or door project on a hillside estate has to run through the Town’s hillside development review, and we handle that process as part of the job. We know the products, and we know the permit path. Call (877) 752-3868 for a free estimate on any CGI scope, large or small.
Why Los Altos Hills Residents Choose Us for CGI Service
Our crew has installed and serviced CGI windows and doors across the Peninsula for years, including Mountain View CGI service, so we know the specific hardware, glazing, and flashing details these products demand. We are an independent contractor, not affiliated with or authorized by CGI, and that independence means we recommend what the house actually needs, not what a manufacturer’s program tells us to sell. Glen Mossier, who leads Ashford Contractors, grew up in Foster City’s Marlin Cove watching lagoon-side homes get rebuilt after water damage. He learned early that a window or door is only as good as the drainage and framing around it, which is exactly the discipline Los Altos Hills hillside work requires.
For Los Altos Hills homeowners, we handle CGI service the way the site demands: full scope, one point of accountability. We are a general contractor, not a single-trade window shop, so when a CGI unit fails because the surrounding flashing, drainage, or framing was never done right, we fix the whole system, not just the sash. From the roofline to the foundation, interior and exterior, we keep every trade under one contract.
Styles & brands we work with
Common CGI Construction Problems We Solve in Los Altos Hills
- Aluminum-clad wood rot at the sill. The cladding on CGI 300 Series windows takes a beating on hillside homes where winter rain sheets down sloped lots and sits against the bottom rail. We regularly find wood rot hidden under intact-looking cladding, driven by poor drainage at the sill pan. We pull the unit, repair or replace the sill framing, and reflash it so water moves off the house instead of into it.
- Vinyl frame warping and seal failure. CGI 100 Series vinyl windows on south- and west-facing walls of Los Altos Hills estates absorb intense afternoon sun six months a year. The frames expand, the seals let go, and the glass starts fogging. We replace failed glazing units and, where the frame has warped past spec, recommend a sturdier CGI aluminum-clad line for that exposure.
- Fiberglass door delamination at the bottom rail. CGI 500 Series fiberglass entry doors see repeated wetting and drying through the winter rainy season. Over time the bottom rail can delaminate or crack, especially where a hard surface patio directs splashback onto the door. We replace the slab or the full unit and correct the exterior grade so the next door does not sit in a puddle.
- Sliding glass door track wear and misalignment. Los Altos Hills slabs settle. It is a fact of building on hillside fill and cut slopes. When a sliding door’s track shifts even a few millimeters, the rollers wear fast and the panel drags. We realign the track, replace the rollers, and check the underlying sill for movement before re-installing the panel.
- Fogged dual-pane glass in older CGI units. Many mid-century Los Altos Hills originals still carry their first-generation CGI glazing. Once the desiccant strip saturates, the glass fogs permanently. We replace the insulated glass unit with OEM-compatible glazing and upgrade to impact-rated or fire-rated glass where the Town’s current codes require it.
CGI Service in Los Altos Hills: What Local Conditions Mean for Your Equipment
Los Altos Hills is not flat land, and the Town’s rules reflect that. Hillside estates here often require fire-rated windows and doors for new construction or major remodels under the Town’s wildfire-defensible-construction requirements. CGI’s aluminum-clad wood windows can be specified with fire-rated glazing to meet those codes while keeping the clean architectural lines the Town’s design review boards look for. That is not a requirement you will run into in most neighboring flatland cities, and it changes how we spec a window package. A standard replacement window that works fine on a Foster City cul-de-sac can fail a Los Altos Hills hillside review the first time a planner checks the glazing rating.
We recently replaced a failing sliding glass door in a 1960s ranch home off Altamont Road, not far from CGI in Stanford. The original CGI unit had a corroded track and fogged dual-pane glass. After verifying the rough opening and structural header, we installed a new CGI fiberglass door with impact-rated glass, improving energy efficiency and fire resistance while matching the home’s mid-century lines. That job sat in the Town’s site development review for three weeks, and we had the drainage calculations and geotech sign-off ready before the first question came back. That is what local CGI work here actually looks like.
CGI Models & Products We Service in Los Altos Hills
We service CGI’s aluminum-clad wood windows, including the 300 Series, which remains the most common line on mid-century and custom homes in the 94022 ZIP. We also handle the 100 Series vinyl windows found on smaller additions and accessory structures, and the 500 Series fiberglass entry doors that anchor so many front elevations on these lots. For critical components like hinges, locks, and glazing seals, we source OEM CGI parts so warranty integrity holds. For non-structural items, we use high-quality aftermarket parts when they meet or exceed OEM spec, and we tell you which is which before we order anything. Most common CGI hardware for the Peninsula market is in our local supply chain, which keeps Los Altos Hills turnarounds short. You can learn more about our broader CGI sales & service work across the region here.
See the difference
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AfterCGI Service Pricing in Los Altos Hills
CGI window and door work is priced by scope, and the ranges below reflect what we see on Los Altos Hills hillside estates, where access, drainage correction, and Town review time all factor in. Every estimate is written line by line, so you see exactly what the materials, labor, and permit work cost. No allowances for vague “site conditions” later.
| Service | Price Range |
|---|---|
| Impact Window Installation | $8,000 – $25,000 |
| Window Replacement | $4,500 – $15,000 |
Driveway access and geotechnical reports are common cost drivers on hillside lots. A crane set off Page Mill Road can add thousands to the same window package that would drop onto a flat Foster City street in an afternoon. Your estimate accounts for that before we start, not after. Call (877) 752-3868 to schedule a free estimate and we will walk the site with you.
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 – CGI Construction in Los Altos Hills
Yes. CGI’s aluminum-clad wood windows can be specified with fire-rated glazing that meets the Town’s wildfire-defensible-construction standards for new builds and major remodels. The glazing rating and the frame’s fire resistance both matter, and we document both for the Town’s review. Call (877) 752-3868 if you need a window package that will pass a hillside review on the first submittal.
For standard CGI units in common sizes, we typically have materials on hand or within a week. Custom sizes or fire-rated glazing can run three to five weeks, and Town permit review on hillside lots adds its own timeline on top of that. We sequence the permit submittal and the material order at the same time so neither one waits on the other.
The Town’s hillside development rules require drainage calculations for most window and door changes that touch a foundation opening or exterior grade. We integrate the window flashing, sill pan, and adjacent grade into one drainage design, then submit that as part of the permit package. A window installed without that integration is the one that rots out its sill in three winters.
Yes. When a tree limb comes through a window during a winter storm or a break-in damages a CGI unit, we board up the opening and secure the property same-day where access allows. Then we spec the permanent replacement unit and get the permit moving. Call (877) 752-3868 if you need a board-up now and a real repair scheduled.
Yes, and this is one of the most common requests we get on Los Altos Hills estates adding an accessory dwelling unit, similar to CGI repair in Loyola projects we handle. We match the existing CGI line, finish, and grille pattern so the ADU reads as part of the same property, not a bolt-on. Where the new ADU sits in a wildfire zone, we upgrade to fire-rated glazing that still matches the main house’s aesthetic. Call (877) 752-3868 for a free estimate on the full ADU window package.
Service Areas Near Los Altos Hills
Ashford Contractors runs CGI jobs throughout the mid-Peninsula. We work in Foster City, Redwood Shores, Belmont, San Mateo, San Carlos, and the Highlands-Baywood Park neighborhoods, bringing the same full-scope accountability to every site. For CGI work in neighboring communities, see our CGI service in Broadmoor and CGI service in Daly City pages. Our base of operations spans the greater Los Altos Hills service area and beyond.
Book Your CGI Service in Los Altos Hills Today
If you have a CGI window or door that is failing, fogging, or dragging, or if you are planning a remodel or ADU that needs a complete CGI package, call Ashford Contractors at (877) 752-3868. We will walk the site, check the drainage and glazing requirements, and give you a written estimate that covers the full scope. Build it right the first time, and you won’t be rebuilding it in ten years.
Written by Glen Mossier, Owner at Ashford Contractors, serving Los Altos Hills and the mid-Peninsula since day one.