Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
PGT Construction in Cupertino, CA | Rowan Construction Group Cupertino
We provide independent PGT window and door service across Cupertino, from Monta Vista ranches to new hillside builds near the Santa Cruz foothills. The one thing that makes our PGT work here different: we file permits with the correct agency the first time, because much of Cupertino is legally unincorporated Santa Clara County, not city jurisdiction. Call (669) 202-9618 for a free written estimate on PGT impact window installation, window replacement, or roof replacement.
Why Cupertino Residents Choose Us for PGT Service
We’ve worked PGT products in Cupertino since before the current wave of teardown-and-rebuild projects transformed the 1960s ranch landscape. Grant Rowan, our owner, spent his early years framing hillside lots in Beverly Hills and later trained at Los Angeles Trade-Technical College in structural carpentry and blueprint reading. That background shows up in how we handle Cupertino’s seismic requirements. We know PGT’s WinGuard, VinylMax, and aluminum series because we’ve corrected PGT-specific flashing, glazing, and structural issues on hundreds of Bay Area installs, including full gut renovations in Monta Vista where original rough openings had shifted after decades of micro-movement.
We source OEM PGT glazing, balances, rollers, and weatherstrip when available. Where OEM lead times stretch out, we use quality aftermarket sash locks, screens, and seals that match spec without the wait. Every project starts with a written scope, a materials list with named brands and line-item costs, and a phased timeline the homeowner can follow week by week. Under Clause 1 of The Haven Standard, that written price is delivered before any work starts. No exceptions.
Common PGT Construction Problems We Solve in Cupertino

- Seal failure and fogging in PGT WinGuard insulating glass units. Cupertino’s intense afternoon sun on south- and west-facing exposures degrades edge seals faster than milder climates. We see this regularly on ranch homes in the flatter neighborhoods east of Stevens Creek Boulevard, where original PGT units baked for fifteen years without shade.
- Water intrusion at PGT VinylMax sliding glass door tracks. Older Cupertino ranch homes built on settled slabs often lack proper sill pan and drainage detailing. During retrofits, we upgrade the sill pan and integrate it with the homeowner’s hardscaping so paver patio drainage no longer backs up into the track.
- Frame racking and operating issues in PGT aluminum windows. Cupertino sits in Seismic Design Category D between the San Andreas and Hayward faults. Hillside lots near the Santa Cruz Mountain foothills experience slope creep that twists rough openings over time. We re-square and flash to County standards, not guesswork.
- Corrosion and finish failure on PGT aluminum frames. Coastal-influenced microclimates in lower Cupertino, combined with sprinkler overspray or poor drainage, keep sills wet year-round. We specify marine-grade finishes where conditions demand it and correct drainage paths so the fix lasts.
- Permit jurisdiction confusion delaying PGT impact-rated installs. A large portion of what residents call “Cupertino” - including much of Monta Vista - is legally unincorporated Santa Clara County. Contractors unfamiliar with this invisible boundary file with the wrong agency, triggering delays on projects where clients are spending six figures on construction.
Before
AfterPGT Service in Cupertino: What Local Conditions Mean for Your Equipment
Here’s the Cupertino-specific reality that shapes every PGT window and door project we take on. A large portion of what homeowners call “Cupertino” - including the Monta Vista neighborhood along McClellan Road and the foothill streets west of Miller Avenue - is legally unincorporated Santa Clara County. That means PGT window and door permits must be filed through the County’s Department of Planning and Development, not the City of Cupertino building department. The County’s seismic and Title 24 prescriptive requirements differ from City submittals, and PGT impact-rated units must meet both the CBC’s Seismic Design Category D provisions and the County’s specific energy compliance documentation. Contractors who miss this boundary file with the wrong agency, then wait weeks for a rejection before restarting the process. We’ve pulled County permits for PGT installs on Foothill Boulevard and City permits near Vallco Fashion Park. The difference matters. Our crews show up with the right paperwork already in the system, because “Measure twice, document once, explain it plainly” applies to bureaucracy as much as to framing.
PGT Models & Products We Service in Cupertino

We install, repair, and replace four PGT product families across Cupertino’s housing stock, from original 1960s ranch retrofits to new custom builds on $2M+ lots, including Cupertino Bathroom Remodeling projects.
PGT WinGuard Impact Series. Aluminum impact-rated windows and doors engineered for high-velocity wind zones. In Cupertino, these satisfy the most demanding Title 24 and seismic requirements while giving Apple-adjacent tech clients the smart-home integration and premium finish quality they specify.
PGT VinylMax Series. Vinyl single-hung, casement, and sliding glass doors. The workhorse for ranch home retrofits. We stock common VinylMax sash balances, rollers, and weatherstrip locally for fast turnaround on repair calls.
PGT Aluminum Series. Custom aluminum windows and patio doors. Specified frequently on new hillside builds where the architect wants thin sightlines and the structural engineer needs the strength-to-weight ratio.
PGT Wincore Series. Vinyl replacement windows. Cost-effective option for rental properties and ADU additions, which are extremely common in Cupertino as multigenerational tech families maximize lot utility under California’s liberalized ADU laws.
We are an independent construction firm, not a manufacturer-authorized dealer. Our PGT sales & service is built on direct product knowledge and documented field experience, not a logo on our truck.
PGT Service Pricing in Cupertino
Every PGT project in Cupertino receives a flat written price before work begins, with line-item costs for materials, labor, and permit fees. Here are the ranges for our most common PGT services:
| Service | Cupertino Price Range |
|---|---|
| Impact Window Installation | $8,000 - $25,000 |
| Window Replacement | $4,500 - $15,000 |
| Roof Replacement | $8,000 - $20,000 |
What drives the cost: unit count, opening condition, whether the rough opening needs re-squaring for seismic compliance, and whether we’re filing with Santa Clara County or City of Cupertino. A free estimate includes a documented photo record of existing conditions, a written scope with named PGT product lines and specifications, and a phased timeline. Call (669) 202-9618 to schedule yours.
Serving Cupertino, CA - Our Local Coverage Area

We’re based in the Cupertino 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 - PGT Construction in Cupertino
Yes. PGT WinGuard impact-rated units in unincorporated Santa Clara County areas like Monta Vista must meet the County’s seismic and Title 24 prescriptive requirements, which differ from City of Cupertino submittals. We file with the County’s Department of Planning and Development and include the structural calculations and energy compliance documentation they require. Call (669) 202-9618 and we’ll confirm your property’s jurisdiction before quoting.
Sometimes, but not always economically. For PGT units under 15 years old with intact frames, we can replace the insulating glass unit with OEM PGT glazing and preserve warranty eligibility. For units over 20 years old with failed seals and frame damage, replacement usually makes more sense - the cost of renewing a fogged unit often approaches half the price of a modern impact-rated replacement. We assess each opening and give you both numbers in writing.
PGT WinGuard aluminum impact series, specified with upgraded seismic anchoring and marine-grade finish if the lot experiences coastal moisture. The aluminum frame resists the racking forces from slope creep better than vinyl, and the impact rating satisfies the structural demands of Seismic Design Category D. We engineer the attachment to the shear wall per County standards, not minimum code.
Standard anodized finishes can degrade in coastal-influenced microclimates or where sprinkler overspray keeps sills wet. We specify powder-coated or marine-grade finishes for exposed conditions, and we correct drainage paths so water doesn’t pool. In lower Cupertino near Stevens Creek, we’ve seen standard finishes fail in eight years. With proper specification, they last twenty-plus.
In most cases, yes. Any window replacement affecting more than 75 square feet or 10% of the total window area triggers prescriptive Title 24 compliance documentation in California. In unincorporated Santa Clara County, the County’s energy office reviews this separately from the City. We include Title 24 calculations in our permit package and specify PGT units with NFRC ratings that pass without costly add-ons. Call (669) 202-9618 for a free estimate that includes the full permit and compliance scope.
Service Areas Near Cupertino

We provide PGT window, door, and roofing service throughout our Cupertino service area and neighboring communities. Our crews work regularly in PGT service in Saratoga for hillside estates with similar seismic and drainage complexity, and in PGT service in Los Altos where the housing stock and permit environment overlap with Cupertino’s. We also cover Sunnyvale, Santa Clara, and Campbell for PGT repairs and replacements on ranch homes and new builds.
Book Your PGT Service in Cupertino Today
Call (669) 202-9618 to schedule your free written estimate. We’ll confirm your property’s city or county jurisdiction, inspect your PGT units for frame condition and seal integrity, and deliver a flat price with line-item costs before any work starts. The 365-Day Done Right Promise applies to every project, backed by The Haven Standard in writing, not a handshake.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Cupertino since 2007.







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