Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
PGT Home Additions & ADU: The San Jose Owner’s Guide
Home additions and ADUs built with PGT windows and doors in San Jose typically run $53,100 to $153,400 installed, depending on square footage, foundation work, and how much of the structure is new versus converted. When a PGT product starts failing inside an addition or ADU, the culprit is almost always the installation envelope around it: flashing, sealant, or rough opening prep. We stock the PGT-compatible hardware, rollers, weatherstripping, and fasteners needed to get those units working and sealing the way they should.
Most San Jose homeowners only discover a problem after a rainstorm. A streak down the interior wall near the corner of a PGT slider. A draft coming through the meeting rail of a PGT casement. A patio door in an ADU that suddenly takes two hands to slide. None of these mean the PGT product itself is bad. They mean the connection between the unit and the structure has failed, and that connection is where you lose energy, water, and eventually framing.
Key Takeaways
- PGT home additions and ADU work in San Jose costs $53,100 – $153,400 for full builds; individual PGT part repairs and replacements are a fraction of that.
- PGT makes impact-rated and non-impact lines. The part you need depends on which series your unit is, not just the measurements.
- We are an independent provider. We are not affiliated with PGT, but we install and service their products daily across San Jose.
- Every job gets a written price before work starts. Every completed job carries the 365-Day Done Right Promise in writing.
Which PGT Models This Applies To
PGT’s San Jose presence covers a few major product families, and the parts are not interchangeable across all of them. The series that show up most in our home addition and ADU work are the PGT WinGuard series, the 400 Series, 500 Series, and 700 Series, plus the PGT EnergyVue and SimpleEase lines. If your product sticker is still readable (usually in the corner of the sash or on the frame edge), that series name is the single most important piece of information you can give us before we arrive.
The compatibility gotcha with PGT is the hardware. A 400 Series roller assembly will not fit a WinGuard track, and the weatherstripping profiles differ by series even when the sash width is identical. That’s why we ask for a photo of the sticker or a measurement of the frame in addition to the series name. Aftermarket parts exist for PGT units, but we stock OEM PGT hardware for the series we service. The aftermarket rollers we’ve seen fail faster in San Jose’s dry heat, and that’s not a trade-off worth making for a door you open every day. Measure the visible glass width and height. Then check the corners of the frame for a label. Two minutes of looking saves a wrong-part trip.
Styles & brands we work with
Signs Your PGT Home Additions & ADU Is Failing
- Water staining at the bottom corners of the frame. This usually means the sill flashing was lapped wrong or the pan isn’t sloped to daylight. In San Jose’s wet winters, this shows up within a season or two if the rough opening wasn’t built flat.
- Condensation building between the panes. The PGT seal has failed and the insulating gas is gone. This is a glass assembly replacement, not a seal repair. Warm days and cold nights in San Jose speed this up on older units in ADUs without climate control.
- A slider that jumps or drags. The PGT rollers are worn flat on one side from years of running on the same track. If it’s suddenly stiff, the track may also be out of level from the addition settling.
- You can see daylight around the sash when closed. The weatherstripping has compressed beyond use. In a PGT unit, this is a quick fix if caught early. Left alone, the air leak erases what the window was rated to do.
- The lock doesn’t engage without forcing it. The keeper has shifted, or the sash is racked because the frame was shimmed wrong from the start. Do not force the lock. Forcing it bends the hardware in a way that changes alignment permanently.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
For the PGT parts on a home addition or ADU in San Jose, the installed ranges look like this:
- PGT roller assembly replacement (sliding patio door): $470 – $1,200 installed
- PGT weatherstripping replacement (full door or window): $300 – $710 installed
- PGT insulated glass replacement (per sash): $1,200 – $3,500 installed
- PGT lock and keeper replacement: $250 – $590 installed
- Full PGT unit replacement in an existing opening: $5,310 – $17,700 installed
What drives the range is access and scope. A ground-floor slider in an ADU with the flooring already set around it is a straightforward parts-and-labor job. A second-story PGT casement over a San Jose ranch addition with stucco to protect may take more time. Every quote we write is a fixed number. Parts, labor, disposal, and a written description of the work are all on the page before we start. No number moves at the door. The completed repair carries the 365-Day Done Right Promise. If the work fails inside a year, we come back and correct it at no charge.
For a full home addition or ADU build in San Jose, straight number, written scope, done when we said done. That’s $53,100 – $153,400 depending on size and site conditions, and the written price is in your hand before permits are pulled.
DIY or Call Us?
There are exactly two things a homeowner can safely do with a failing PGT part. You can identify the series from the sticker or the frame corner. You can take clear photos of the issue and send them to us before the first visit. Everything else, we’d advise against. PGT sashes are heavy. A sliding glass door on an ADU can weigh well over 100 pounds. Dropping one while trying to pull the rollers yourself turns an $800 repair into a $3,000 replacement, and the injury risk is real. Same with glass assemblies. A PGT insulated unit under pressure will break unpredictably if you pry it wrong. We’ve seen it in San Jose garages more times than we’d like.
That’s not a scare tactic. It’s a straight trade assessment. If you want to diagnose and document, call us at (669) 272-2637 and we’ll walk you through where to look. If you want it fixed this week, we’ll bring the part and the written price.
FAQs
Sealed PGT glass assemblies in our climate typically hold their seal for 15 to 22 years. Hardware like rollers and locks may need service every 8 to 12 years, sooner if the unit gets hard daily use. A south-facing San Jose ADU with full sun will age weatherstripping faster than a shaded north wall. Call (669) 272-2637 and we’ll give you an honest read on where your unit is in that timeline.
Rollers, locks, and weatherstripping are replaceable parts. A failed glass seal is not repairable and requires a new insulated glass unit. A bent or racked frame from improper installation usually means the whole unit comes out. We’ll tell you before any work begins which category yours falls into and put the price in writing. Call (669) 272-2637 for that assessment.
Roller, lock, and weatherstripping replacements on a PGT slider or window run 1 to 2 hours on site, assuming the part is in stock. An insulated glass replacement is a two-visit job: we measure, order the factory glass, then install when it arrives, which is typically under two weeks for the PGT series we service. If the issue is part of a larger home addition or ADU project in San Jose, we’ll fold it into the written scope so you’re not paying twice for mobilization.
Yes. We carry OEM PGT rollers, weatherstripping profiles, locks, and keepers for the 400, 500, 700, WinGuard, EnergyVue, and SimpleEase lines that show up most in San Jose additions and ADUs. If your unit needs factory glass, that’s ordered per-unit to match the original spec, and we won’t guess at the substitute. We also stock parts for KraftMaid, Cambria, and Silestone products when those are part of the same project. Call (669) 272-2637 with the series name and we’ll confirm what’s on the truck before we head your way.
If you have a PGT window or door failing inside a San Jose home addition or ADU, don’t let it sit. Water and air move faster through a failed seal than most people realize, and the damage compounds behind the wall. Call (669) 272-2637 for a free estimate. We answer the phone. We’ll give you a written price before any work starts. And we’ll stand behind the repair with the 365-Day Done Right Promise in writing.
Written by Curtis Lane, Owner, Bradford Remodeling Co at Bradford Remodeling Co San Jose, serving San Jose and nearby areas.
