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Before
After
Before
After
Before
AfterWindows & Doors in Los Altos, CA
Window installation in Los Altos usually means replacing 50-to-65-year-old aluminum single-pane sliders and jalousie windows on original postwar ranch homes, and the job nearly always carries a California Title 24 compliance requirement with documented U-factor and SHGC ratings. Most Los Altos homeowners skip budget vinyl altogether and specify fiberglass, wood-clad, or European lift-and-slide systems instead. If you’re researching what your replacement will cost and how the process works here, call (509) 265-6387 for a written, line-item estimate before any work begins.
Why Los Altos Homes Are Different
Los Altos is saturated with single-story ranch homes built between 1950 and 1975, most with wide low-profile façades, long horizontal aluminum slider windows, and generous sliding glass doors opening to rear patios. Those original frames are now corroding at the corners and leaking at the weatherstripping. The morning marine layer that reaches Los Altos condenses visibly on aged single-pane aluminum, accelerating interior sill rot, and that condensation pattern is one of the first things homeowners notice before a replacement inquiry. The area’s alkaline soils create a second problem specific to sliding doors: the aluminum track corrodes into the concrete threshold, and the original rollers are long discontinued. Repair stops making financial sense, which is why full-door replacement happens even when the rest of the windows are still sound. Summers are dry and warm but rarely extreme, so solar heat gain selection and indoor-outdoor acoustic continuity matter more than brute thermal insulation. Every permit-pulled replacement must meet California Title 24 energy compliance, with documented U-factor and SHGC values on the paperwork, which makes product specification more involved than in neighboring cities.
Our Main Los Altos Services
Two services account for most of the calls we receive from Los Altos homeowners: full door installation and window replacement. Each has its own dedicated Los Altos page with detailed pricing and process information.
Door Installation in Los Altos
The 1960s-era 6-foot or 8-foot aluminum slider is the single most common failure point we see in Los Altos. The original track corrodes into the concrete threshold, the rollers are no longer manufactured, and the only sensible fix is a new door with a properly flashed and sealed threshold. Door Installation in Los Altos covers what replacement involves, what it costs, and why the patio door usually goes first.
Window Replacement in Los Altos
Original aluminum single-pane windows on Los Altos ranch homes are at the end of their service life, and Title 24 compliance turns a simple swap into a documented performance upgrade. Window Replacement in Los Altos explains the U-factor and SHGC paperwork, the product tiers most common here, and what a full-home replacement costs.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterWindow Installation in Los Altos
Window installation in Los Altos usually means removing original 1950s-to-1970s aluminum single-pane units from a single-story ranch and installing Title 24-compliant replacements with documented U-factor and SHGC ratings. We specify by performance tier and price range, not by what is in stock, and most Los Altos jobs land in fiberglass, wood-clad, or European systems rather than budget vinyl. For the full scope of what we install, see Window Installation.
Single & Double Hung Windows
Signs you need it
Sash frames that bind when opened, visible corrosion where aluminum meets glass, and condensation forming on the interior sill each morning.
What it costs in Los Altos
Single and double hung replacements in Los Altos typically run $850-$1,450 per opening depending on frame material, glass package, and Title 24 documentation.
How we do it
We measure each opening, write the scope and price, remove the old aluminum sash, set the new frame with shims and flashing, insulate the cavity, and level the new sashes before sealing.
Horizontal Roller Windows
Signs you need it
Rollers that grind or skip, tracks corroded from years of marine-layer condensation, and frames bowed enough to see daylight at the meeting rail.
What it costs in Los Altos
Horizontal roller windows in Los Altos run $700-$1,300 per opening, with the higher end reflecting larger sightlines common on ranch-home façades.
How we do it
We remove the original track and frame, square the rough opening, set the new roller assembly, and verify the sash travel before exterior trim and sealant go on.
Casement Windows
Signs you need it
Crank mechanisms that slip or seize, warped sashes that no longer seat against the weatherstripping, and failed glazing seals with visible fog between panes.
What it costs in Los Altos
Casement replacements run $900-$1,600 per unit in Los Altos, and hardware upgrades push the price up more than glass choice does.
How we do it
We measure the rough opening, order the correct hinge-side swing, set the frame, mount the sash, and adjust the crank and locking points until the seal is uniform around all four sides.
Awning & Hopper Windows
Signs you need it
Hinges pulling from the frame, cracked glass in small bathroom or kitchen openings, and rust at the bottom edge where condensation pools.
What it costs in Los Altos
Awning and hopper units in Los Altos run $550-$950 per opening, with custom sizing above 36 inches pushing toward the top of that range.
How we do it
We remove the old sash and frame, flash the opening, set the new fixed or operable unit, and confirm drainage weep holes are clear before final sealing.
What Window Installation Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Single or double hung window (per opening) | $850-$1,450 |
| Horizontal roller window (per opening) | $700-$1,300 |
| Casement window (per opening) | $900-$1,600 |
Do I need Title 24 documentation for window replacement in Los Altos?
Yes, any permit-pulled replacement in Los Altos must meet California Title 24 energy compliance. We provide documented U-factor and SHGC ratings with every written quote, so the paperwork and the product specification travel together from the first survey. Call (509) 265-6387 for a free estimate.
How long does a full-home window installation take in Los Altos?
Most single-story ranch homes in Los Altos take two to four working days for full window replacement, depending on the count and any custom sizing. The schedule is written into the estimate before work starts. Call (509) 265-6387 to review your scope.
Impact Windows & Doors in Los Altos
Impact windows and doors in Los Altos are less about hurricane seasons and more about protecting large glass openings on ranch homes where a single failed panel compromises interior comfort and security. The original aluminum sliders and patio doors were never glazed for impact resistance, and retrofitting them usually means full replacement rather than film or hardware upgrades. Impact Windows & Doors covers the product tiers and performance specs we specify here.
Impact-Resistant Windows
Signs you need it
Single-pane aluminum that bows visibly under hand pressure, cracked glass from years of frame settlement, and openings with no secondary protection against blown debris.
What it costs in Los Altos
Impact-resistant windows in Los Altos run $1,200-$2,200 per opening, with larger horizontal sliders at the top of the range.
How we do it
We measure the opening, specify the correct impact glazing and frame rating, set the new unit in flashing, and verify the assembly sticker is documented in the photo record.
Impact Sliding Glass Doors
Signs you need it
Patio doors with corroded aluminum tracks, rollers no longer manufactured, and panel glass that was never laminated or tempered to current code.
What it costs in Los Altos
Impact sliding glass doors in Los Altos run $1,800-$3,000 per panel, with multi-panel configurations priced per opening.
How we do it
We remove the old track and threshold, flash the opening, set the new impact-rated frame, and install the panel with code-compliant rollers and locks.
What Impact Windows & Doors Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Impact-resistant window (per opening) | $1,200-$2,200 |
| Impact sliding glass door (per panel) | $1,800-$3,000 |
| Custom impact glazing upgrade (per opening) | $350-$650 |
Do I need impact windows in Los Altos if I’m not in a hurricane zone?
You don’t need them for storm code, but Los Altos homes with large original aluminum openings benefit from the structural stiffness and laminated glazing, especially on rear patio walls. Call (509) 265-6387 for a written quote.
Will impact windows change the look of my Los Altos ranch home?
Impact glazing adds thickness but looks nearly identical to standard glass from the outside. We match frame profiles to the original sightlines so the low-profile ranch façade holds its character. Call (509) 265-6387 for details.
Energy-Efficient Windows in Los Altos
Energy-efficient windows in Los Altos are a Title 24 compliance project as much as a comfort upgrade. The original single-pane aluminum on postwar ranch homes has U-factor and SHGC ratings far below current California code, and condensation from the marine layer makes the problem visible on sills every morning. Energy-Efficient Windows explains our specification process.
Low-E & Argon Gas Glass
Signs you need it
Single-pane glass that fogs or forms visible condensation each morning, and rooms that gain noticeable heat on the west side by late afternoon.
What it costs in Los Altos
Low-E with argon gas adds $200-$400 per opening in Los Altos over standard double glazing, with larger ranch-style sliders at the higher end.
How we do it
We specify the correct Low-E coating and gas fill for the orientation of each opening, then document the assembly’s U-factor and SHGC on the written quote.
ENERGY STAR Replacement Windows
Signs you need it
Utility bills that spike in winter despite mild Los Altos temperatures, and frames that feel cold to the touch from the inside on foggy mornings.
What it costs in Los Altos
ENERGY STAR replacement windows in Los Altos run $800-$1,500 per opening, and most projects upgrade to the Northern California climate zone spec.
How we do it
We match the window’s performance rating to the orientation and shade of each wall, set the frame with insulated cavity fill, and verify the label for Title 24 paperwork.
What Energy-Efficient Windows Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Low-E + argon glass upgrade (per opening) | $200-$400 |
| ENERGY STAR replacement window (per opening) | $800-$1,500 |
| Full-home energy upgrade (8-12 openings) | $8,000-$14,000 |
Will energy-efficient windows qualify for California rebates in Los Altos?
Many ENERGY STAR and Title 24-compliant replacements qualify for state or utility incentive programs in Los Altos. We document the U-factor and SHGC on the written quote for your rebate application. Call (509) 265-6387 for a free estimate.
What SHGC should I choose for a Los Altos home?
For Los Altos’s dry, warm summers, a moderate SHGC between 0.25 and 0.35 usually balances solar gain and daylight. West-facing openings get the lower end of that range. Call (509) 265-6387 for an exact recommendation.
Sliding & Patio Doors in Los Altos
Sliding and patio doors in Los Altos are the single most common failure point we find on original postwar ranch homes. The 1960s-era aluminum tracks corrode into the concrete threshold because of the area’s alkaline soils, and the original rollers are long discontinued, making repair uneconomical and driving full-door replacement. Sliding & Patio Doors covers what we install and why the patio door usually goes first.
Sliding Glass Door Replacement
Signs you need it
A track so corroded the door drags or catches, rollers that no longer exist in the manufacturer catalog, and daylight visible where the frame meets the threshold.
What it costs in Los Altos
Sliding glass door replacement in Los Altos runs $1,500-$2,800 per panel, with corroded threshold rebuilds adding $300-$600.
How we do it
We cut out the old aluminum track, rebuild the threshold with proper flashing, set the new frame, and install the panel with rollers rated for the door weight.
Patio Doors
Signs you need it
Original doors that no longer seal against the weatherstripping, visible frame corrosion where the track meets the patio, and a threshold that trips occupants.
What it costs in Los Altos
Standard patio door replacement in Los Altos runs $1,200-$2,400 per unit depending on panel count and frame material.
How we do it
We measure the rough opening, specify the right swing or slide configuration, set the frame with insulated fill, and adjust the rollers until the panel moves with two fingers.
What Sliding & Patio Doors Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Sliding glass door replacement (per panel) | $1,500-$2,800 |
| Patio door replacement (per unit) | $1,200-$2,400 |
| Corroded threshold rebuild | $300-$600 |
Why do patio doors fail first in Los Altos?
The alkaline soils in Los Altos accelerate aluminum track corrosion at the concrete threshold, and the 1960s rollers are no longer manufactured. Once the track fails, the door drags, leaks, and cannot be repaired economically. Call (509) 265-6387 for a replacement quote.
Can I replace just the sliding door track?
In most Los Altos ranch homes, the original aluminum track is corroded into the threshold and the rollers are discontinued, so a track-only repair isn’t viable. We quote the full door replacement with a written price. Call (509) 265-6387 to schedule a survey.
Impact Garage Doors in Los Altos
Impact garage doors in Los Altos matter less for hurricane risk and more because the original wood or thin aluminum doors on postwar ranch homes are no longer torsionally stiff enough for modern openers. A door that flexes under wind pressure or binds against its tracks is a safety and security issue, not just a cosmetic one. Impact Garage Doors covers the replacement process and product tiers.
Hurricane-Rated Garage Doors
Signs you need it
Door panels that flex under hand pressure, visible fatigue cracks at hinge points, and a door that sways in the wind while closed.
What it costs in Los Altos
Hurricane-rated garage doors in Los Altos run $1,500-$2,800 for a single bay and $2,500-$4,500 for a double bay.
How we do it
We measure the rough opening, verify the track and spring mounting points, set the new reinforced door, and balance the torsion assembly before final testing.
Garage Door Replacement
Signs you need it
Bent or twisted tracks, springs that no longer hold tension, and panels corroded through the bottom rail from decades of pavement splash-back.
What it costs in Los Altos
Garage door replacement in Los Altos runs $1,200-$2,500 for a single bay and $2,000-$4,000 for a double bay, depending on material and insulation.
How we do it
We remove the old door and track, set the new frame, install the torsion springs with correct winding, and verify the door balances at mid-height under power.
What Impact Garage Doors Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Hurricane-rated garage door (single bay) | $1,500-$2,800 |
| Hurricane-rated garage door (double bay) | $2,500-$4,500 |
| Standard garage door replacement (single bay) | $1,200-$2,500 |
Do I need a wind-load-rated garage door in Los Altos?
Los Altos is not in a high-velocity hurricane zone, but original 1950s-1970s doors often fail wind-load checks after decades of track wear. We specify the correct rating for your opening. Call (509) 265-6387 for a written quote.
Are garage door springs dangerous to work on?
Yes. Torsion springs are under high tension and can cause serious injury if they release unexpectedly. We send background-checked, uniformed technicians who handle spring and track work with the door braced. Call (509) 265-6387 to schedule an estimate.
Custom & Geometric Windows in Los Altos
Custom and geometric windows in Los Altos are driven by two different projects: original ranch homes with unusual mid-century openings that no stock size fits, and new custom construction replacing teardowns with high-specification window packages. Both require measured surveys that become the written quote, because the dimensions are the document. Custom & Geometric Windows explains our process.
Geometric & Shaped Windows
Signs you need it
Openings with non-rectangular shapes, gable-end glass that stock catalogs don’t cover, and original mid-century cutouts that were site-built.
What it costs in Los Altos
Geometric and shaped windows in Los Altos run $1,000-$1,800 per opening, with multi-angle cuts pricing at the top of the range.
How we do it
We field-measure every angle, produce a template from the measured survey, fabricate to the exact sightline, and set the unit in flashed framing.
Arched & Curved Windows
Signs you need it
Arched or radius openings that no longer hold a stock unit, and original curved glass that has cracked or fogged from frame settlement.
What it costs in Los Altos
Arched and curved windows in Los Altos run $1,200-$2,200 per opening, with true radius glazing costing more than segmented arches.
How we do it
We take a digital template of the radius, fabricate the curved frame and glazing to match, and set the unit with a continuous head flashing.
What Custom & Geometric Windows Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Geometric or shaped window (per opening) | $1,000-$1,800 |
| Arched or curved window (per opening) | $1,200-$2,200 |
| Oversized opening with structural header | $1,500-$2,800 |
Can you match the original mid-century window shapes on my Los Altos ranch?
Yes, we field-measure each opening and fabricate to the original sightlines, including the wide horizontal proportions common on 1950s-1970s ranch façades in Los Altos. Call (509) 265-6387 for a template and written price.
How do you price a custom window without a stock catalog price?
We price from the measured survey itself. Every angle, radius, and sightline is documented, and that document becomes the written quote, so the price is fixed before fabrication begins. Call (509) 265-6387 to schedule a survey.
Brands We Service in Los Altos
We specify from PGT, CGI, CWS, and ES Windows by performance tier and price range, not by what’s in stock. Parts for most common Los Altos replacements are available within a week through our Bay Area supply chain. See our brands for the full line detail.
Pricing for Windows & Doors in Los Altos, CA
| Service | Typical range in Los Altos |
|---|---|
| Single or double hung window (per opening) | $850-$1,450 |
| Horizontal roller window (per opening) | $700-$1,300 |
| Casement window (per opening) | $900-$1,600 |
| Impact-resistant window (per opening) | $1,200-$2,200 |
| ENERGY STAR replacement window (per opening) | $800-$1,500 |
| Sliding glass door replacement (per panel) | $1,500-$2,800 |
| Patio door replacement (per unit) | $1,200-$2,400 |
| Hurricane-rated garage door (single bay) | $1,500-$2,800 |
| Geometric or shaped window (per opening) | $1,000-$1,800 |
| Arched or curved window (per opening) | $1,200-$2,200 |
Prices in Los Altos push upward when the original threshold has corroded into the concrete and needs a rebuild, when Title 24 documentation must cover non-standard opening sizes, and when the job requires matching mid-century sightlines with custom fabrication. Every price on this page is a written range, not a verbal estimate, and the quote you receive is the measured survey turned into a fixed price before any work starts.
Neighborhoods We Serve in Los Altos
We work throughout Los Altos, from the ranch-home streets near downtown to the newer custom construction on the hillsides. Our crews coordinate from the San Francisco Bay Area office, so response for most Los Altos locations is same-week for surveys and estimates.
- North Los Altos
- South Los Altos
- Los Altos Hills
- Country Club area
- Woodland Acres
Service Area - Cities Near Los Altos
We also serve homeowners in the neighboring communities of Mountain View, CA, Palo Alto, CA, Menlo Park, CA, and Sunnyvale, CA. If you’re on the border of Los Altos and one of these cities, we’ll confirm coverage when you call.
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 Windows & Doors in Los Altos
Yes, most replacement work in Los Altos requires a permit, and every permit-pulled job must meet California Title 24 energy compliance with documented U-factor and SHGC ratings. We handle the permit paperwork as part of the written scope. Call (509) 265-6387 to review your project.
Some Los Altos neighborhoods with active HOAs have design-review requirements for visible front-facing openings, particularly where the original ranch-home character is protected. We provide spec sheets and sightline drawings for HOA submittal. Call (509) 265-6387 for documentation support.
We typically schedule surveys in Los Altos within the same week you call. The measured survey you keep becomes the written quote, and installation scheduling is written into that document before you sign anything. Call (509) 265-6387 to book your survey.
What happens when you call
- 1A real person answersNo phone trees - talk to a local windows & doors pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Los Altos Customers Say
"Replaced eight windows. They showed me the U-factor on the units they were actually fitting rather than the brochure numbers."
- Kofi B."They photographed the rotten sill they found under the old frame before replacing it, and the extra cost was agreed in writing before they carried on."
- Rosalind C."Front door install went smoothly. Written warranty, clear price, no pressure to upgrade anything."
- Nils H.