Window Replacement Contractor in Cupertino

We serve Northern California across three regions: the San Francisco Bay Area, Greater Sacramento, and the Central Valley. Our published guides cover 14 counties and 88 cities. Our Castro Valley and Sacramento offices support local estimating, permit coordination, and project planning across these regions.

Financing may be available for eligible projects with approved credit. Available terms depend on lender approval, project scope, and current programs. Your project manager can review the options that apply before work begins. We also accept checks, ACH, and major credit cards.

Yes. Hamilton Exteriors holds CSLB License #1078806, active general liability coverage, and the required contractor bond. We also hold GAF Master Elite and James Hardie Elite Preferred credentials. We can provide current proof of coverage before work begins.

Permit requirements depend on the project scope and local jurisdiction. Hamilton Exteriors coordinates required applications, plan documents, corrections, and inspections. Permit fees and allowances appear in the proposal before construction begins.

Request pricing for the actual windows and installation scope. Sizes, frames, operating styles, glass, and opening condition affect the proposal. Compare complete installed estimates that identify removal, flashing, trim, and repairs, rather than treating material-only prices as total costs.

Most Cupertino homes with 10 to 15 windows take 1 to 2 days. Each window takes approximately 45 to 90 minutes to remove, prep, install, insulate, flash, and trim. Larger projects with 20 or more windows or custom sizes may take 3 days. We install one window at a time and seal each opening before moving to the next, so your home is never left open to the elements.

Yes. Cupertino requires a building permit for window replacement. Permit fees typically range from $200 to $600 (Hamilton Exteriors 2024-2026 project data). Hamilton Exteriors handles the entire permit process — application, plan submission, and scheduling inspections. Permit fees appear as a separate line item in your estimate so you see every cost upfront.

For Cupertino's hot summers, casement windows provide the best airflow and tightest seal when closed. They capture 50 to 90 percent more airflow than sliders, according to the American Architectural Manufacturers Association. For homes that rely on natural cooling instead of air conditioning, casement windows are the top choice. Double-hung windows are a strong second option for homes where traditional aesthetics matter.

Standard double-hung vinyl windows run $700 to $1,500 per unit installed (Hamilton Exteriors 2024-2026 project data). Premium fiberglass casement windows cost $1,000 to $1,500 per unit. A typical Cupertino home with 15 to 20 windows costs $12,000 to $25,000 for a full replacement. Every Hamilton Exteriors estimate is itemized — window units, trim, flashing, labor, and cleanup listed separately.