Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Door Installation Across Union City
Door installation in Union City runs between $900 and $4,200 for most homes in the 94587, depending on whether we’re replacing a single slab or reframing a racked opening. We work the tract-home neighborhoods off Alvarado-Niles Road, Mission Boulevard, and the western flatlands every week, so we know what’s behind those old aluminum frames before we pull them. If your door binds in July or won’t latch without lifting the handle, you don’t have a hardware problem. You have a Union City soil problem, and we know how to fix it. Call (888) 635-0804 for a free estimate.
Why TruePane Windows & Doors Is Union City’s Preferred Door Installation Company
We’ve been working doors in this city long enough to know that the flatlands near old Alvarado settle differently than the hills above Decoto. That’s not marketing copy. It’s a fact our crews correct for on nearly every pre-1980 door replacement we touch. Homeowners here have let us into their homes for over four decades because we show up when we say we will, in uniform, and we write a quote that doesn’t change once the wall is open. Our team of Door Installation technicians is background-checked and trained to find what the last contractor missed.
When a Union City homeowner calls, a live person answers. Not a phone tree, not a callback service. We dispatch locally from our Bay Area office, and our crews know the streets off Decoto Road and the subdivisions near Contempo Park. We don’t send a salesman with a binder. We send a glazier who measures every opening twice.
The Done Right Promise covers every install. If it’s not right, we come back and make it right. No arguing, no fine print. That’s the Keystone Standard, and it’s been our rule since Dale Kessler founded this company.
Our Door Installation Services in Union City
Entry & Swing Doors
Most entry doors in Union City’s 1960s and 1970s tract homes are original hollow-core slabs with single-pane sidelights. They leak air, they’ve warped from decades of marine-layer moisture, and the frames have gone out of square from bay-mud settlement. We replace them with fiberglass or steel entry systems, set into a reinforced buck so the latch strikes true. In the flatlands near Alvarado, we check the header and jack studs before quoting. That’s the difference between a door that works for a season and one that works for thirty years.

Double & French Doors
French doors in Union City fail in predictable ways. The salt air off the Dumbarton corridor pits the aluminum cladding, the seals go, and the panes fog between the glass. We replace them with dual-pane insulated units on PGT or ES Windows lines, with continuous flashing tape at the sill and head. If the existing rough opening has been racked by settlement, we correct the framing before the new doors go in. A French door set into a twisted frame will bind again within a year. We won’t do that to you.

Bifold & Folding Doors
Bifold and sliding & patio doors in Union City are increasingly popular in homes opening onto patios and backyards, particularly along the newer subdivisions near Mission Boulevard. The challenge locally is racking: a poorly set top track on a settling slab will bend and bind. We level the header, set the track in a true line, and adjust every panel before we leave. The Keystone Standard applies here too: both warranty layers registered in writing, durations stated.

Pivot Doors
A pivot door is a statement piece, and it demands a plumb jamb and a level floor. In Union City’s western flatlands, that means checking for differential settlement before the door is ordered. We’ve installed pivot doors in newer homes near Kitayama and older remodels throughout the Decoto district. We spec the hardware for the actual load-bearing point, not the manufacturer’s default, and we don’t walk until the door swings on a true axis. If the pane is not true, the job is not done.

What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Union City
We’re an authorized installer for PGT, CGI, and ES Windows, among more than a dozen manufacturer lines. That matters because our Union City customers get side-by-side quotes on paper, not a vague verbal estimate. We register both warranty layers in writing before the truck leaves the driveway. If you’re comparing a PGT vinyl sliding door against a CGI impact-rated model for Union City, we’ll show you the actual line-item differences in frame gauge, glass package, and warranty duration. No guessing.
Common Door Installation Problems We See in Union City Homes
- Doors that won’t latch without lifting the handle. This is the classic symptom of differential settlement on Union City’s bay-mud soils. The jamb racks, the strike plate misses the bolt, and the door binds. A hardware replacement won’t hold. We correct the framing first.
- Corroded aluminum door frames. Salt-laden marine air from the bay blows straight through the Dumbarton corridor and pitted the aluminum frames on thousands of 1960s and 1970s doors. Once the corner welds fail, the frame twists and the seal breaks. The door needs full replacement, not a patch.
- Fogged glass in French and patio doors. The marine layer drives big indoor-outdoor temperature swings here. When the seal between panes fails, moisture gets trapped permanently. That’s a failed IGU, not seasonal condensation, and it means replacing the panel or the entire door if the frame is also compromised.
- Out-of-square rough openings behind old doors. When we pull an old slider or entry door in the western flatlands near old Alvarado, we often find the framing shifted. If we set a new door into that opening without correcting it, the new door will bind. We reframe with a reinforced buck, then flash and seal properly.
Pricing for Door Installation in Union City, CA
A straightforward single entry door replacement in Union City typically runs $900 to $2,600 installed. A double French door with new framing and flashing runs $2,200 to $4,200. Bifold and folding door systems start around $1,800 and run up from there depending on the number of panels and track system. If we find settlement damage, broken headers, or code-triggered upgrades once the wall is open, we write the allowance into the contract before we start and every change order is priced and approved in writing. No surprise line items. Call (888) 635-0804 for an exact quote. Estimates are free. Our Union City customers also get a senior or veteran discount of 5% off the total.
We Also Serve Cities Near Union City
Our crews work Union City daily and regularly handle Door Installation in Union City neighborhoods from the Alvarado flatlands to the hills above Decoto. We also serve Fremont, Newark, San Lorenzo, and Castro Valley for homeowners dealing with the same bay-mud settlement and salt-air corrosion issues we correct here every week.
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 - Door Installation in Union City
The bay-mud soil under the old Alvarado and Decoto districts compresses unevenly over time, and that settles the foundation by fractions of an inch. Those fractions rack the door jamb so the strike plate no longer lines up with the latch bolt. The fix isn’t a new lock set. It’s squaring the rough opening and reframing the jamb before installing the door. Call (888) 635-0804 and we’ll diagnose the real cause before you spend money on hardware.
Yes, in many cases it will. When a Union City permit inspection opens an exterior wall on a pre-1980 home, the original single-pane glazing usually falls below current Title 24 energy standards for Union City. That means the city can require you to bring the replacement up to code. We handle this every week: we write the likely code upgrades into the contract as a visible allowance, pull the permit, and schedule the inspection. If surprises come up, we price them in writing and get your approval before we touch anything. No change orders without warning.
The Dumbarton Bridge corridor funnels bay winds and salt-laden air directly over Union City’s western neighborhoods. That marine air is corrosive, and it grits up weatherstripping and breaks down door sweeps faster than the sheltered inland conditions you’ll find in most of Fremont. We install marine-rated sweeps and weatherstripping on west-facing doors for this reason. It costs a little more up front and lasts several extra years.
Seasonal condensation appears on the interior side of the glass and wipes off with a cloth. If the fog is between the two panes, it will not wipe off, and it means the insulating glass unit’s seal has failed. In Union City’s marine layer climate, that seal failure usually means moisture has been working its way in for months. The fix is a replacement IGU or a new door. We’ll inspect it and tell you which is worth the money.
You can sometimes hang a new slab on an existing frame if the jamb is square and solid. In the western flatlands, the frame is frequently racked from settlement, and the rough opening is out of square. When that’s the case, a slab-only swap leaves the same binding problem behind a new door. We’ll measure the opening, check the jamb with a level, and tell you straight whether a frame replacement is necessary. Call (888) 635-0804 for a free assessment.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Union City with a Done Right Promise on every install.



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