If you live in Concord and your windows are drafty, hard to open, or showing condensation between panes, you need a window replacement contractor who understands Contra Costa County's specific conditions. Hamilton Exteriors is an architect-led design-build firm serving Concord homeowners since 2018. We install energy-efficient windows that handle Concord's hot inland summers, meet California Title 24 energy codes, and come with a 50-year manufacturer warranty.
Get Your Free Quote
Why Concord Homeowners Choose Hamilton Exteriors
Most window companies in Concord send a salesperson who reads from a script. We send a project manager who works for an architect and general contractor. Alexander Hamilton Li holds CSLB license #1078806 and oversees every Concord project from inspection through final walkthrough. Our estimates are itemized line by line — materials, labor, permits, and cleanup listed separately. You see exactly where your money goes before we start.
Concord's Climate and Your Windows
Concord sits in the inland East Bay where summer temperatures regularly reach 100°F according to NOAA climate data. That heat puts stress on window seals and frames. Single-pane aluminum windows — common in Concord homes built before 1990 — lose 30 to 40 percent of heating and cooling energy according to the U.S. Department of Energy. Upgrading to dual-pane Low-E windows with a U-factor of 0.25 or lower exceeds California Title 24 requirements by 15 to 20 percent and keeps your home cooler without overworking your AC.
Seismic Considerations for Concord Homes
Concord sits near the Concord Fault and within range of the Hayward Fault. The California Geological Survey maps Concord in a zone of moderate to high seismic shaking potential. During window replacement, we use structural-grade fasteners and seismic-rated flashing details that meet current California Building Code requirements. If your home has original windows from the 1960s or 1970s, the framing around them may need reinforcement — we inspect for that during your on-site consultation.
Fire Zone Awareness in Contra Costa County
While Concord itself is not in a designated Wildland-Urban Interface zone, parts of Contra Costa County — including areas of San Ramon, Lafayette, Orinda, and Danville — are classified as State Responsibility Area Very High Fire Hazard Severity Zones by CAL FIRE. If your Concord home is near open space or the Diablo foothills, we can recommend windows with tempered glass and non-combustible frames that provide additional fire resistance.
Window Styles We Install in Concord
We install windows from Milgard, Andersen, and Marvin — all factory-certified with full manufacturer warranties. The most popular styles for Concord homes include:
- Double-hung windows: The classic choice for Craftsman and ranch-style homes. Both sashes tilt in for easy cleaning. $700 to $1,500 per window installed.
- Casement windows: Crank-open windows that capture 50 to 90 percent more airflow than sliders according to the American Architectural Manufacturers Association. Ideal for capturing Concord's Delta breezes.
- Single-slider windows: Slide horizontally with no exterior clearance needed. Common in Eichler and mid-century homes throughout Contra Costa County.
- Picture windows: Fixed panes that maximize natural light and views. The most energy-efficient option since they don't open. $800 to $2,500 installed.
See our full window styles and pricing page for details on each type.
How Much Does Window Replacement Cost in Concord?
For a typical Concord home with 15 to 20 windows, a full replacement costs $12,000 to $25,000 (Hamilton Exteriors 2024-2026 project data). Per-window pricing breaks down as follows:
- Standard double-hung vinyl: $650 to $950 per unit installed
- Casement windows: $800 to $1,500 per unit installed
- Picture windows: $800 to $2,500 per unit installed
- Sliding glass doors: $2,500 to $4,500 installed
All prices include removal of existing windows, new flashing, materials, labor, trim, and cleanup. Energy-efficient Low-E glass is standard on every window. Structural modifications or drywall repair add to the total. Every Hamilton Exteriors estimate is itemized so you see each cost component.
Concord Building Permits for Window Replacement
Most window replacements in Concord require a building permit. The Concord Building Division issues permits for window replacements that change the size or type of window opening. Permit fees in Concord typically run $200 to $600 depending on the scope of work. Hamilton Exteriors handles the entire permit process — application, plan submission, and scheduling inspections. Permit fees appear as a separate line item in your estimate.
What Our Concord Customers Say
Our 4.8-star Google rating comes from real Bay Area homeowners. Concord customers consistently mention our transparent pricing, clean job sites, and the fact that we finish on schedule. We maintain that rating by doing the work right the first time and standing behind every installation with a 50-year manufacturer warranty and our own workmanship guarantee.
Get Your Free Window Estimate in Concord
Ready to replace your windows? Call (650) 977-3351 or fill out our form for a free on-site estimate. We'll measure your windows, discuss your options, and provide a fully itemized quote. Hamilton Exteriors serves Concord and all of Contra Costa County. CSLB #1078806.
Get Your Free Quote
Call Now (650) 977-3351 
