Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Windows & Doors Across Los Altos
Window and door work in Los Altos is rarely a simple swap. Most homes here were built between 1950 and 1975, and the original aluminum frames, undersized headers, and failed flashing we find behind them are predictable but never cheap to fix correctly. A typical window replacement in Los Altos runs $4,500-$15,000, and impact window installation lands between $8,000-$25,000 depending on how many openings and what condition the framing is in. We’re Barrett & Sons Construction, and we’ve been doing this work long enough to know that the quote you get on the phone means nothing until somebody opens the wall and looks. Call (877) 610-1318 and we’ll schedule a free estimate with someone who actually looks before they quote.
Why Barrett & Sons Construction Is Los Altos’s Preferred Windows & Doors Company
We’re the owner-operated alternative to outfits that sell you windows over the phone from another state. Tom Barrett founded this company in 1998, and his sons run the crews. When we quote a window or door job in Los Altos, the person who shakes your hand is the person whose name is on the truck. Not a franchise, not a rotating cast of subcontracted crews. And when something isn’t done right, Tom comes back. That’s not marketing language. It’s the 90-Day Done Right Promise, written on every contract.
Los Altos homeowners tend to be thorough. They want to know who’s actually on the job, whether permits get pulled, and whether the price can move once the work starts. We answer those questions the same way every time: permits pulled and inspections signed on every eligible job, every price change issued as a written change order before work proceeds, and scope, allowances, and changes all in writing. No exceptions.
Our crews know Los Altos neighborhoods because we work here regularly. From the Country Club area to the ranch streets south of Foothill Expressway and over toward the 94022 and 94024 zip codes, we’re familiar with the post-WWII tract construction, the expansive adobe clay under the flatlands, and the tree rules that catch out-of-area contractors off guard. That local knowledge is the difference between a quote that holds and a quote that falls apart the minute the siding comes off.
Our Windows & Doors Services in Los Altos
Window Installation
New window installation in Los Altos often means working with openings that haven’t been touched since the Eisenhower administration. We don’t just set the new unit and trim it out. We check the rough opening for square, inspect the header for undersizing, and verify the flashing and waterproofing details before the new window goes in. On homes in 94022 and 94023 where original aluminum frames are still in place, this inspection step regularly turns up rot and failed sealant that has been quietly leaking for years. We’d rather find it while the wall is open than have you find it as a water stain next winter.
Door Installation
Door replacement in Los Altos is rarely just a door. The original 1960s entry doors on these ranch homes were often installed with minimal flashing, and decades of winter rains have done what winter rains do. When we pull an old entry door, we check the threshold, the subfloor, and the framing around the rough opening. If there’s dry rot or an undersized header, we write it up, price it, and get your signed approval before we proceed. That’s how change orders work here: nothing happens without your signature first.
Window Replacement
Window replacement in Los Altos sits at the center of what we do. The majority of homes in this city were built before 1975, and the single-pane aluminum frames that came with them are thermally inefficient, often failed at the seals, and frequently surrounded by deteriorated flashing. A full-house replacement on a 1,800 square foot ranch in Los Altos typically falls in the $4,500-$15,000 range depending on window count, frame material, and how much repair the surrounding openings need. We carry Andersen and Marvin products because they’re brands you can look up, not mystery units off a van.
Impact Windows & Doors
Impact windows and doors are not just a Florida product. Los Altos homeowners install them for security, for sound reduction along Foothill Expressway and El Camino Real, and for the same reason they install anything else: because the house deserves better than what it was built with. Impact window installation in a typical Los Altos ranch runs $8,000-$25,000. We’ll walk you through the options for laminated glass, impact-rated frames, and the structural requirements that matter when you’re upgrading openings in an older home.
Trusted Brands We Service in Los Altos
We install and service Andersen and Marvin windows, and for custom and sliding door work we regularly specify Fleetwood units, particularly on the custom and patio projects that are common across Los Altos. We keep relationships with local suppliers close so that lead times for Los Altos jobs stay predictable, and when a homeowner wants a specific product line, we quote it by name and we install what we quoted. No bait, no switch. If you’re comparing quotes, ask the other guy what brands they actually carry. Then compare.
Common Windows & Doors Problems We See in Los Altos Homes
- Undersized load-bearing headers. The tract houses of the 1950s and 1960s in Los Altos were built fast and to minimum code. When we enlarge a rough opening for a wider door or a bigger window, we regularly find a header that isn’t big enough for the new span. Engineered replacement is required before the inspector will sign off, and it’s a scope item we price as a written change order.
- Failed waterproofing at original aluminum windows. The original aluminum frames installed across 94022, 94023, and 94024 were never great at keeping water out, and fifty years of wet winters have done the rest. We’ve opened walls in Los Altos and found the subfloor at the threshold completely compromised from water that’s been migrating for decades. It doesn’t show until you pull the old unit.
- Expansive clay soil movement. Los Altos sits on adobe clay that swells in the rainy season and shrinks in the summer. That differential movement puts stress on window and door frames, especially on shallow concrete-perimeter foundations. We see racked frames, cracked glass at corners, and doors that bind seasonally. Sometimes the fix is the opening itself, not the unit.
- Tree-protection surprises on exterior openings. If you’re adding or enlarging an exterior door or window and there’s a protected oak in the root zone, Los Altos’s tree ordinance can require an arborist report and canopy-protection fencing before the permit moves. We’ve seen this stop projects that out-of-area contractors quoted without checking. We check.
Pricing for Windows & Doors in Los Altos, CA
Here’s where we earn your trust: we give you real numbers up front, and we explain what moves them. The table below reflects typical market pricing in Los Altos as of this year. No allowances hidden in the fine print, no “it depends” without specifics. When we quote a job, the scope is written, the allowances are written, and any change comes to you as a written change order before the work happens.
| Service | Typical Los Altos Price Range |
|---|---|
| Window Replacement | $4,500 - $15,000 |
| Impact Window Installation | $8,000 - $25,000 |
| Sliding & Patio Doors | Priced per project after on-site inspection |
What moves the number? How many openings you’re replacing, whether the rough openings need reframing, what the waterproofing inspection turns up, and whether your project triggers a city permit review that involves the tree ordinance. We’d rather quote you honestly and be slightly higher than the phone-quote outfit than show up and hand you a change order you didn’t see coming. Our estimates are free. Call (877) 610-1318 to schedule one.
We Also Serve Cities Near Los Altos
Beyond Los Altos proper, our crews regularly work in Los Altos Hills, Mountain View, Stanford, and Sunnyvale. If you’re in one of those neighboring communities and looking for Windows & Doors in Los Altos quality without the corporate runaround, call us. We coordinate scheduling from our Bay Area office and serve Los Altos locally, so you won’t hear that your job is outside the service area or that it’ll be “a couple weeks before we can get someone out.”
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 - Windows & Doors in Los Altos
Yes, it can, and that’s exactly why we inspect before we quote. Los Altos enforces its own building code through the city’s planning and building department, and when a like-for-like replacement becomes a larger opening or reveals a structural deficiency, the permit can trigger requirements like engineered headers, shear wall upgrades, or hold-down installation that older tract homes never had. The good news is we handle this daily in Los Altos. We know what the inspector will ask for because we’ve stood next to the same inspectors on the same types of houses for years. Call (877) 610-1318 and we’ll walk your specific house through the process before you commit.
Look for staining or softness below and around window sills, and check the threshold of any exterior door for sponginess or visible rot. On Los Altos ranch homes especially, water that’s been migrating behind the original aluminum frames for decades often leaves no mark on the inside wall until the framing is already compromised. If the caulk is cracked, if the sill feels soft, if you see efflorescence on exterior stucco around the frame, that’s your sign. The only way to know for sure is to pull the unit. We do that inspection as part of the estimate, not after you’ve signed. Schedule your free estimate at (877) 610-1318.
Maybe, but Los Altos’s tree-preservation ordinance changes the process. If a protected oak is within the root zone of the wall where you’re expanding the rough opening, the city can require an arborist report, canopy-protection fencing, and explicit sign-off before the permit is issued. This doesn’t exist in neighboring Mountain View or Sunnyvale, and it’s the kind of thing that quietly halts a project when a contractor doesn’t know to check. We’ve done this in the Country Club neighborhood. We know what the city asks for, and we build it into the timeline and the price up front. Call (877) 610-1318 and tell us where the tree is. We’ll tell you what applies.
In Los Altos, most straightforward window and door replacements where you’re not changing the rough opening size do not require a building permit, but the minute you enlarge an opening, move a door, or alter structural framing, you do. And if your house sits on a lot with a protected oak, even like-for-like work can trigger review if the root zone is disturbed. We pull permits on every eligible job because the inspector works for you, not for us. When a permit is pulled, the inspection sign-off protects you. Tom Barrett publishes his name, address, and license number, because you should look it up before you sign anything. Call (877) 610-1318 and we’ll tell you what your specific project needs.
The same way we handle everything: in writing, before we touch it. We replaced a 1960s ranch’s original sliding glass door in the Country Club neighborhood with a custom Fleetwood sliding door. Once we pulled the old unit, the load-bearing header above the opening was undersized and the subfloor at the threshold had dry rot from failed waterproofing. We wrote a change order for a new engineered header and sill repair, got the homeowner’s signed approval, and completed the work before inspection sign-off so the project stayed on the permit’s draw schedule. That’s the only way this should ever work: you know the new price before the new work happens. Call (877) 610-1318 to get your free estimate, and ask about our $40 off any repair over $200 while you’re at it.
Contact Barrett & Sons Construction for Windows & Doors in Los Altos
If you live in Los Altos and you’re thinking about replacing windows, upgrading a patio door, or addressing rot and failed waterproofing before it gets worse, call us at (877) 610-1318. We’ll send someone who actually looks at the wall before quoting it. Free estimates, free second opinions on any written estimate, no trip charge inside the county, and a permanent 10% senior and veteran discount. We’re a local company with a name on the truck and a 90-Day Done Right Promise on every job. You won’t reach a call center. You’ll reach a real person. Call today.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Los Altos since 1998.