Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterWindow Company in San Mateo, CA
San Mateo is a city where the right window or door choice depends heavily on which side of El Camino Real you live on. On the eastern flats near the Bay, salt-laden afternoon winds chew through aluminum frames and door hardware faster than almost anywhere else on the Peninsula. On the western hills, persistent coastal fog creates a completely different failure pattern: wood swelling, sticking doors, and sill rot. At Westlight Windows & Doors, we match the product to the exposure, not the other way around. Call (903) 354-7134 and we’ll walk you through what your specific street needs.
Why San Mateo Homes Are Different
Most of San Mateo’s housing stock was built between the 1940s and 1970s as single-story ranch homes, and a large share of those still have their original single-pane aluminum sliders and hollow-core entry doors. In neighborhoods like Shoreview, North Shoreview, and the flat tracts east of 101, we routinely see 1960s aluminum sliding windows with seized roller assemblies and heavily oxidized tracks. The frames still look intact from the outside, but the window hasn’t opened in years because bay-wind salt exposure destroyed the hardware while the anodized shell held. This specific failure pattern is far less common in Burlingame, just to the north, which gets a bit more topographic shelter from direct bay exposure.
The western hills tell a different story. Fog hangs longer there, and moisture-driven failures dominate: wood frames swell, painted sashes stick, and door sills rot from the bottom up. Older streets near downtown and the Baywood neighborhood also hold 1910s-to-1930s Craftsman bungalows with wood double-hung windows. Those jobs require careful fitting to meet Title 24 energy requirements without erasing the home’s original character. The right approach on a hillside bungalow is not the right approach on a Shoreview ranch, and we plan each job accordingly.
Our Main San Mateo Services
Most San Mateo homeowners call us for one of three things, and each has its own page with local pricing and details.
Window Replacement in San Mateo
Replacing the original aluminum sliders in a 1960s Shoreview ranch is a different job than re-glazing a 1920s double-hung near downtown. We carry eight manufacturer lines, including impact-rated PGT and CGI for homes within a mile of the shoreline, and energy-efficient ECO Window Systems for Title 24 compliance. Full details, including pricing ranges for sliders, double-hungs, and casements, are on the Window Replacement in San Mateo page.
Window Installation in San Mateo
New-construction and addition work in San Mateo means coordinating with your builder or remodeler, pulling permits where required, and sealing openings correctly against the city’s specific wind-driven rain patterns. We install every window we sell, from PGT and CGI to CWS and ES Windows, using the same written-price, written-guarantee process on every job. See the Window Installation in San Mateo page for scope and local install details.
Door Installation in San Mateo
Entry doors on the bay side of San Mateo take a beating from salt air, and hollow-core originals from the 1960s and 70s often fail at the threshold and hinges before the slab itself gives out. We install Therma-Tru entry doors and other lines matched to the exposure, with careful attention to threshold sealing and weatherstripping. Pricing and product notes are on the Door Installation in San Mateo page.
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.
Brands We Service in San Mateo
We install and service windows and doors from eight manufacturers, including impact-rated PGT and CGI for bayfront exposure, plus CWS and ES Windows for a range of budgets and styles. Parts for common repairs are stocked locally in our Bay Area supply chain, which keeps most San Mateo jobs moving without waiting on a slow factory order. Full product details are on our brands page.
Pricing for Window Company in San Mateo, CA
Here are the ranges we typically see in San Mateo right now. Every job gets a written price before any work starts, and that price does not change at the door.
| Service | Typical range in San Mateo |
|---|---|
| Single window replacement (aluminum or vinyl) | $600 - $1,200 installed |
| Single window replacement (wood or fiberglass) | $900 - $2,000 installed |
| Full-home window replacement (10-15 windows) | $8,000 - $20,000 installed |
| Bay window replacement | $2,500 - $5,500 installed |
| Garden window replacement | $1,500 - $3,500 installed |
| Sliding patio door replacement | $1,800 - $4,000 installed |
| French door replacement | $2,000 - $4,500 installed |
| Entry door replacement (steel or fiberglass) | $1,500 - $3,500 installed |
| Custom wood entry door | $3,000 - $7,000 installed |
| Window installation (new construction, per opening) | $400 - $900 installed |
| Door installation (new construction, per opening) | $500 - $1,200 installed |
Prices in San Mateo push toward the higher end of these ranges when we’re working on the bay side, where corroded hardware and seized sliders often add removal time. Wood-frame homes in fog-heavy hillside areas can also carry extra cost if sill rot has spread beyond the opening. Whatever we quote, you get it in writing before the first screw turns.
Neighborhoods We Serve in San Mateo
We work across all of San Mateo, from the bayfront flats to the foggy hills. Here are a few of the neighborhoods we’re in most weeks:
- Shoreview
- North Shoreview
- Baywood
- Hillsdale
- Aragon
We schedule San Mateo jobs in a single visit window and show up in the window we gave. If the work fails inside the guarantee period, we come back at no charge.
Service Area – Cities Near San Mateo
Westlight Windows & Doors serves San Mateo and the surrounding Peninsula. We also work regularly in Burlingame, CA, Belmont, CA, Millbrae, CA, and San Carlos, CA. If you’re just outside these areas, call us anyway. We’ll tell you honestly whether we can reach you.
Serving San Mateo, CA - Our Local Coverage Area
We’re based in the San Mateo 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 Window Company in San Mateo
We schedule work across the Peninsula daily, and most San Mateo estimates can be booked within a few days. We show up in the arrival window we gave you, and our phones are answered by a real person around the clock. Call (903) 354-7134.
Straight replacements of like-for-like window sizes usually don’t need a permit, but changing opening sizes or structural work does. We check local building code before the job and pull permits when required. You’ll know the permit status in writing before work begins.
Many San Mateo HOAs have appearance rules for window styles and colors, especially in planned developments. We can work from your HOA’s approved product list or help you navigate the approval paperwork. Call us with your HOA packet and we’ll sort it out.
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 San Mateo Customers Say
"Got quotes from three companies. Westlight wasn't the cheapest but they were the only one who measured everything carefully and put it all in writing. Worth it. No surprises on install day."
- Craig Dillard"Our sliding patio door had come off its track years ago and we just lived with it. New one is smooth as butter. They hauled off the old one and vacuumed up before they left."
- Jessica Landry"Replaced eight drafty old windows that were basically single pane. The house is warmer already and the street noise is way down. Crew was on time both days and the price was exactly the quote."
- Harold Bemis