Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterFast, Reliable Windows & Doors Across Los Altos
Window and door replacement in Los Altos typically runs $4,500-$15,000 for standard replacements and $8,000-$25,000 for impact-rated systems. Most jobs take two to five days once materials arrive, and permits are required on nearly every opening change in this city. Barrett & Sons Construction has been navigating Los Altos’s specific inspection process long enough to know exactly which questions the building department will ask before you sign anything. Call (877) 610-1318 for a free estimate, and we’ll walk the property with you. No voicemail tag, no out-of-state call center. Tom answers his own phone.
Los Altos is not a generic suburb full of interchangeable tract homes. It’s a city where a 1962 rancher can sit on $3 million of dirt, and that changes every decision about whether to replace a window or reframe an entire wall. The information-gain on this page is simple: Adobe clay, protected oaks, and 60-year-old framing are all in play on the average Los Altos job. If your contractor doesn’t know that, the quote probably won’t hold.
Why Barrett & Sons Construction Is Los Altos’s Preferred Windows & Doors Company
The last contractor most Los Altos homeowners hired before us talked a good game on the phone, then sent a crew nobody had ever met. That’s the exact thing we don’t do. Tom Barrett’s name, his address, and his license number are published and verifiable. His sons run the crews. If you walk through downtown Los Altos on a Saturday, there’s a decent chance you’ll see one of them picking up breakfast between jobs. We live in the Bay Area, we work in Los Altos constantly, and we answer when you call.
Reviews from Los Altos customers tend to mention the same three things: the written change orders, the crew showing up on time, and the fact that a permit inspector’s sign-off wasn’t treated like some optional formality. We pull permits on every eligible job in Los Altos. The permit inspector works for you, not for me, and that’s the whole point. In a city where the building department has its own design-review process, that matters.
Our Windows & Doors Services in Los Altos
Window Replacement
Most of the homes in Los Altos’s 94022 and 94024 ZIPs were built between 1950 and 1975, which means single-pane aluminum sliders and wood frames that have been expanding and contracting over Adobe clay for six decades. When we pull those out, we routinely find undersized headers sagging over the openings. A proper window replacement in Los Altos isn’t just swapping glass. It’s reframing, flashing, shimming for level, and making sure the opening won’t rack out of square within a few wet-dry seasons. That’s standard practice for us, not an upsell halfway through the job.
Door Installation
Entry doors and patio doors in Los Altos sit on foundations that move. The flatlands around 94023 are built on expansive Adobe clay that swells in winter and shrinks in summer. A door hung with standard shims and basic caulk will bind by the second season. We use flexible flashing, proper sill pans, and oversized rough openings with structurally rated shims so the door operates cleanly even as the slab shifts. If you’re replacing a front door on a 1960s ranch, expect us to check the jamb and subfloor before we quote you a number.
Impact Windows & Doors
Los Altos doesn’t sit in a hurricane zone, but impact-rated glazing still pays off here. These are heavy laminated units that cut noise from El Camino Real traffic and add real structural rigidity to older openings. On homes where the original post-and-pier foundation was never designed for large glass, impact systems often require additional header work. We quote that work up front, in writing, before a single nail moves. A typical impact window package in Los Altos runs $8,000-$25,000 depending on how many openings and whether you’re replacing standard sliders or installing larger custom units.
Custom Windows & Doors
Los Altos has a lot of homes with odd-sized openings, rounded-tops, and mid-century sightlines that don’t match anything at a big-box store. Custom window and door orders are common here, and they require exact field measurements, multiple manufacturer submittals, and a design review that the city may flag. We handle the submittals. You approve the final spec. Any allowance that isn’t on paper is a surprise waiting for a date, so every custom order gets a written allowance before we order the first unit.
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.
Trusted Brands We Service in Los Altos
We work with Andersen, Marvin, Milgard, and LaCantina on the window and door side, plus Quikrete and Oldcastle products when the job involves threshold patching, sill work, or concrete repair around openings. We stock standard flashing, shims, and sealant compatible with these systems locally, so a routine Los Altos job doesn’t stall out waiting on a shipment. If you already have a brand in mind, we’ll quote it. If you want our recommendation for a specific opening, we’ll tell you plainly what holds up in Adobe clay country and what doesn’t.
Common Windows & Doors Problems We See in Los Altos Homes
- Racked frames from Adobe clay movement. Los Altos sits on expansive soil that swells in winter and shrinks in summer. Windows and doors that weren’t installed with flexible flashing and proper shims start binding, leaking, or cracking within a couple of seasons.
- Undersized headers over original openings. A lot of the post-WWII ranch homes in 94022 and 94024 have 2×4 headers over window and slider openings that aren’t rated for the span. When you put a larger modern unit in, the header has to be upgraded to an LVL or steel beam. Skip that step and the drywall cracks start within months.
- Failed sills and water intrusion at the base of patio doors. The original sill flashing on 1950s-1970s homes was often just a bead of caulk. Once the caulk fails, water wicks into the subfloor and framing. We find rot behind the stucco around older sliding doors in Los Altos regularly.
- Heritage oak roots pushing against perimeter foundations. Los Altos’s tree-preservation ordinance protects native and heritage oaks, and those root systems can extend well beyond the canopy. A door or window expansion that disturbs a root zone without an arborist report can halt the project until the city signs off.
Pricing for Windows & Doors in Los Altos, CA
Here are the numbers we quote most often on Los Altos jobs:
| Service | Typical Price Range |
|---|---|
| Window Replacement | $4,500 - $15,000 |
| Impact Window Installation | $8,000 - $25,000 |
What actually moves those numbers in Los Altos is what’s behind the wall once we open it. Adobe clay movement means we check the rough opening for square and the foundation for differential settling before we quote. Undersized headers trigger reframing. Rot from failed sills triggers subfloor repair. Every one of those line items goes into your written estimate before work starts. If the inspector requires a seismic strap upgrade or the city’s design review asks for a different exterior treatment, you’ll approve the change order in writing before we spend a dollar on it. Call (877) 610-1318 for a free estimate. We’ll give you a real number, not a ballpark that mysteriously doubles at the door.
We Also Serve Cities Near Los Altos
Beyond Los Altos proper, our Windows & Doors team covers Los Altos Hills, Mountain View, Stanford, and Sunnyvale. Same crews, same written change orders, same 90-Day Done Right Promise. If you’re in the hills above 94022 or just across the border in Mountain View, we’re already familiar with the local building departments and soil conditions. Read more about our work across the region on our Windows & Doors in Los Altos page.
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. Los Altos requires permits for any window or door replacement that changes the rough opening size, affects the structural framing, or alters the exterior appearance. Even like-for-like replacements can trigger a review if the home is in a design-review district. We pull every permit and schedule every inspection. The permit inspector works for you, not for us, and a signed-off permit is your proof the work was done to code. Call (877) 610-1318 if you want to know whether your specific job needs one, and we’ll give you a straight answer before we quote anything.
Adobe clay expands and contracts significantly with seasonal moisture, causing differential movement in slab-on-grade and shallow perimeter foundations. That means the rough openings around windows and doors shift over time. If they’re not installed with flexible flashing, proper shim spacing, and fasteners that allow some movement, the units will rack, bind, and leak within a few seasons. On the 1960s ranches around 94022, we always inspect the foundation before installation and factor the soil behavior into how we set and seal every opening. It’s one of the few things in Los Altos you can’t shortcut.
Often yes, but it depends on the scope. Enlarging one opening usually triggers a review of that specific header, the shear wall around it, and sometimes the foundation under that wall. It does not automatically trigger a whole-house seismic retrofit. However, if we open a wall on an original post-and-pier foundation and find missing strapping or undersized footings, the inspector may require us to correct it in that scope. We’ll tell you what’s likely to be flagged before you commit. Get an exact answer for your home by calling (877) 610-1318.
You should expect every allowance in writing. That means the window unit itself, the flashing and shims, the stucco or siding repair around the opening, the interior drywall patch, and any structural work like header upgrades. If we suspect rot behind the sill or foundation issues under the framing, that goes in as a written allowance with a stated not-to-exceed number. No surprise invoices at the end. An allowance that isn’t on paper is a surprise waiting for a date, and we’ve been doing written allowances on every Los Altos job since 1998.
Yes, directly. Los Altos protects native and heritage oaks, and a permit for a new sliding door or patio opening can require an arborist report if the work falls within a tree’s root protection zone. You can’t extend an excavation or trench near a protected oak without city sign-off, and sometimes canopy protection fencing has to go up before any ground is broken. We check the tree map and the city’s requirements before we design the opening, so you don’t get stopped mid-project. Call (877) 610-1318 for a free estimate, and we’ll check your lot against the city’s oak inventory before we quote.
One More Thing Los Altos Homeowners Should Know
Opening up an older Los Altos home for window or door replacement usually turns up exactly what the editorial lens on this page says it will: outdated wiring, undersized framing, failed waterproofing, and a code upgrade the permit triggers the moment walls are open. That’s the single biggest reason a window quote moves in this city. Here’s how we handle it: inspection first, every known line item in writing, and any condition we can’t see until the wall is open gets priced and approved by you before we touch it. That’s the Barrett & Sons way, and it’s why our replacement jobs in Los Altos don’t end with an awkward phone call about an extra $4,000 nobody mentioned.
There’s a field note worth sharing. On a 1960s ranch in the Los Altos Hills foothills near the 94022 ZIP, we removed the original single-pane aluminum sliders and found undersized 2×4 headers sagging over the openings. The homeowner wanted bigger glass and a clean indoor-outdoor connection. We installed new Milgard Tuscany vinyl windows and a LaCantina multi-slide door, reframed the openings with LVL headers, and added sill pan flashing before the stucco repair and inspection sign-off. That job is done right, and if anything moves, one call brings Tom back. That’s the 90-Day Done Right Promise, written on every contract.
If you’re in Los Altos and you’re ready to talk windows, doors, or a full opening reframe, call (877) 610-1318. We’ll walk the property, check the soil and the tree map, and give you a written estimate that holds. Free estimates. Free second opinion on any written estimate you already have. No trip charge inside the county. And a permanent 10% Senior & Veteran discount on every job. Ask anyone on your street, or look up the license number yourself.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Los Altos and the South Bay since 1998.