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Window Company in Union City, CA
Union City homeowners call us when windows fog between the panes, exterior doors won’t latch, or drafts show up in rooms that had no issue last winter. Most homes here were built in the 1960s and 1970s with original single-pane aluminum frames, and the Bay mud under the western flatlands has been slowly shifting the ground beneath them for decades. That combination means window and door work in Union City often involves more than a product swap; it means re-squaring openings that have drifted out of plumb. If you’re asking what a full window or door job costs in Union City, the honest range is $850-$1,900 per window and $1,100-$3,600 per door, installed. Call (903) 354-7134 and we’ll put a written price in your hand before any work begins.
Why Union City Homes Are Different
Union City sits at the edge of San Francisco Bay, and the western flatlands from Alvarado to the bay are built on fill that Alameda County’s hazard maps classify as a top liquefaction zone. What that means for a home with nine windows and three doors is visible but easy to misread: a front door that scraped cleanly last May starts catching on the jamb in December. A window that closed tight for thirty years suddenly lets a cold draft across the sill. Homeowners often assume the hardware failed. What usually happened is the rough opening underneath slowly moved.
Contractors who work this ground know to check for it. Before quoting a door in the Alvarado district or the streets around Decoto, we check the frame for plumb. It’s common to find openings one to two inches out of square on homes with no visible cracking anywhere. New hardware alone won’t fix that. The frame has to be re-squared and shimmed, or the new door binds within months. The same goes for windows: the salt-heavy bay air corrodes aluminum frames faster here than in Livermore or Dublin, and fog between panes in a Union City ranch home usually means a failed seal that’s been working against damp marine air for years. We see it constantly.
Our Main Union City Services
Most Union City calls start with a failed window or a door that no longer latches. These are the two services homeowners request most, and each has its own page covering local pricing, what the job includes, and how long it takes.
Window Replacement in Union City
Replacing windows in Union City’s 1960s and 1970s tract housing means pulling single-pane aluminum frames that have spent fifty years in salt-laden fog. The job is measured, permitted where needed, and installed with the opening re-squared before the new frame goes in. Homeowners in Decoto and Alvarado tell us the difference is immediate, warmer rooms in winter and quieter mornings near the BART line. We carry vinyl and fiberglass options that hold up far better against bay air than the aluminum they replace. See typical prices and what a full replacement covers on the Window Replacement in Union City page.

Window Installation in Union City
Window installation covers new-construction installs, additions, and replacing windows in rooms being renovated. In Union City, that often means working on 1980s and 1990s stucco-clad subdivisions where existing openings may have drifted slightly out of square over the decades. We verify the rough opening, flash it correctly for damp bay winters, and set the frame plumb and level before the trim goes back. Homeowners near the Union City BART station have used this service for multifamily work as well. See the full breakdown on the Window Installation in Union City page.

Door Installation in Union City
Door installation in Union City almost always starts with the frame, not the slab. On the western flatlands, years of Bay-mud settlement leave door openings out of square, and a new door hung in a racked frame will bind within weeks. We check plumb, re-square and shim the rough opening, then install the new door with threshold sealing that handles wet winters and bay fog. Entry doors, patio sliders, and interior doors are all in scope, with fiberglass and Therma-Tru options available for exterior work. Details and local pricing are on the Door Installation in Union City 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 Union City
We install from eight manufacturer lines, so Union City homes get the right product for the conditions here. That includes impact-rated CGI and ES Windows for homes near the bay, and energy-efficient ECO Window Systems for the older ranch stock in Alvarado and Decoto. See the full lineup on our brands page.
Pricing for Window Company in Union City, CA
| Service | Typical range in Union City |
|---|---|
| Single window replacement (installed) | $850-$1,900 |
| Standard vinyl window (installed) | $850-$1,900 |
| Fiberglass window (installed) | $950-$2,300 |
| Wood window (installed) | $1,100-$2,400 |
| Bay or bow window (installed) | $1,800-$3,800 |
| Full-home retrofit window package (8-10 windows) | $8,500-$16,500 |
| Patio door replacement (installed) | $1,700-$3,600 |
| Front entry door (installed) | $1,100-$3,600 |
| Sliding patio door (installed) | $1,700-$3,400 |
| French patio door (installed) | $1,400-$3,300 |
Prices in Union City move higher when openings need re-squaring, which is common on the western flatlands, or when rot around old frames has to be cut out and repaired before the new unit goes in. Whatever the number, you get it in writing before any work starts, and that price does not change at the door.
Neighborhoods We Serve in Union City
Our crews work across all of Union City’s residential areas, from the older ranch-style streets of Alvarado and Decoto to the stucco subdivisions near the BART station and the newer multifamily clusters along Union City Boulevard. We schedule locally, so the drive to any address in the city is short and show-up windows are tight.
- Alvarado
- Decoto
- Union City Boulevard corridor
- Area around BART station
- Seven Hills / Mission Boulevard area
Service Area – Cities Near Union City
Westlight Windows & Doors coordinates Union City work from a San Francisco Bay Area dispatch office, and crews live in the East Bay. Along with Union City, we regularly serve Fremont, CA, Newark, CA, San Lorenzo, CA, and Castro Valley, CA. If you’re a few minutes outside city limits, call and ask, we’ll tell you directly whether we can get a crew to you.
Serving Union City, CA - Our Local Coverage Area
We’re based in the Union City 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 Union City
We schedule estimates within the week in almost every case, and a human answers the phone 24/7, so you won’t leave a message and wonder when we’ll call back. The written price comes before any commitment; you keep it whether or not you hire us. Call (903) 354-7134 to pick a time.
Most like-for-like replacements don’t require a permit, but jobs that change opening size, add structural framing, or fall under certain multifamily rules often do. We tell you during the estimate, and when a permit is needed, we pull it and handle the inspection. You’ll know before work starts.
Yes. Full-home packages are common here because so many Union City houses date to the 1960s and 1970s and still have every original window. We walk the whole home, give you a single written price for the full scope, and schedule the work in a sequence that leaves no opening exposed overnight. Call (903) 354-7134 for a free estimate.
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 Union City Customers Say
"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"Our energy bill in summer was brutal. New windows made a real dent in it. Salesman wasn't pushy and didn't do the fake "today only" discount thing the others tried."
- Bethany Oh










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