Window Contractor in San Mateo

We serve Northern California across three regions: the San Francisco Bay Area (six counties from Alameda to Santa Clara), Greater Sacramento (Sacramento out to Roseville, Folsom, and Davis), and the Central Valley (Stockton to Modesto). Our crews are based in Castro Valley. We handle permits and know the building codes for each jurisdiction, which matters because requirements and fees vary significantly between cities.

We offer $0-down financing with approved credit, 12-month same-as-cash plans, and extended terms up to 15 years for larger projects. You only pay for completed, inspected work — we never ask for full payment before the job is done. Your project manager will walk you through every option during your estimate appointment. We also accept checks, ACH, and all major credit cards.

Yes. CSLB License #1078806 — verify it anytime at cslb.ca.gov. We carry $2M general liability, full workers’ comp, and are bonded per California law. We hold GAF Master Elite, Owens Corning Preferred, CertainTeed ShingleMaster, and James Hardie Elite Preferred certifications — each requires annual training and quality audits to maintain. We’re happy to provide proof of insurance before any work begins.

Most exterior projects in Northern California require a building permit. Fees vary by city — Oakland runs $200–$600, Peninsula cities often more. We handle the entire permit process: application, plan submission, and scheduling inspections. Permit fees appear as a separate line item in your estimate so you’ll see every cost upfront. For homes in WUI fire zones (Berkeley Hills, Oakland Hills, parts of Marin), we ensure full compliance with local fire-rated material requirements.

Replacement windows in San Mateo typically cost $400-$1,200 per window depending on size, style, and glass options. With San Mateo County energy rebates, many San Mateo homeowners save on the total cost. We provide free in-home quotes.

The best window style depends on your home's architecture and ventilation needs. Double hung windows are our most popular in San Mateo for their classic look and easy cleaning. For homes in San Mateo Park, casement windows offer superior airflow and modern aesthetics.

Most window replacement projects in San Mateo take 1-2 days for a full home. We install from the exterior whenever possible to minimize disruption to your daily life.

Absolutely. San Mateo homeowners with dual-pane Low-E windows typically save 15-25% on energy bills. With median home prices at $1,600,000, new windows also boost resale value. Many San Mateo County utility rebates are available.

Yes, we install bay, bow, picture, garden, and specialty windows throughout San Mateo and San Mateo County. Bay windows are especially popular in neighborhoods like Aragon where they maximize natural light and views.

Window replacement in San Mateo typically ranges from $800 to $1,500 per window depending on size, style, and glass type. A whole-home project for an average San Mateo home runs $12,000 to $30,000. We provide free consultations with exact pricing.

Modern dual-pane Low-E windows can reduce heating and cooling costs by 15-30% in San Mateo. With the Peninsula's mild climate, energy-efficient windows also improve comfort year-round by reducing drafts and hot spots.

San Mateo has 1930s-1960s Craftsmans and ranches mixed with newer development. We install double-hung, casement, bay, picture, and sliding windows that match your home's architectural character while meeting current performance standards. Our architect-led approach ensures design continuity.

Yes, all window replacements in San Mateo must meet California Title 24 energy standards. This means minimum U-factor and SHGC ratings for Climate Zone 3. Hamilton Exteriors installs only compliant products and handles documentation.

San Mateo County requires permits when changing window sizes or adding new openings. Like-for-like replacements may be exempt, but we confirm with the building department on every San Mateo project. Permit handling is included in our service.