Mixed vintage stock with 1950s steel casement and aluminum sliders still in service. Energy code CZ3 requires U-factor 0.30. Downtown corridor noise makes acoustic performance a selling point.
Now Booking Fall 2026: Schedule Your Consultation
Window Replacement Contractor in San Mateo
500+ projects
Since 2018
Limited Lifetime
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Send your window count and project details. We will schedule measurements and review the product and installation options with you.
Window brands and contractor credentials
Customer-Service Obsessed
Responsive from consultation through project closeout
Architect and general contractor
One accountable team
Licensed, bonded, and insured
Verified business credentials
Window Styles 
Choose the Window Style That Fits the Opening
Single-Hung Windows
A fixed upper sash and operable lower sash for familiar operation, ventilation, and a straightforward replacement path.
Single-Slider Windows
Horizontal operation where exterior swing clearance is limited, with the opening and drainage details measured before ordering.
Sliding Glass Doors
Large glazed openings coordinated with sill support, flashing, drainage, operation, safety glass, trim, and adjacent finishes.
Picture Windows
Fixed glass for daylight and views, planned around glass size, exposure, energy ratings, structural support, and interior trim.
Double-Hung Windows
Two operable sashes for flexible ventilation, with frame proportions and trim selected for the home and opening.
Casement Windows
Hinged windows with compression seals, planned around swing clearance, hardware access, ventilation, and egress needs.
San Mateo's housing stock spans 15% pre-1940, 30% 1940-1960, 25% 1960-1985. Architectural styles range from 1940s-50s ranch homes and Cape Cods in San Mateo Park and Hillsdale to pre-war Colonials and Tudors in Baywood. Each era and style presents different windows requirements — from material compatibility to structural considerations. Our crews know what to expect before they arrive on site.
Neighborhoods We Serve
Windows Across San Mateo Neighborhoods
Local planning starts with the site, neighborhood context, access, and applicable city review.
Aragon
Aragon homeowners frequently choose Hamilton Exteriors for windows. Mixed vintage stock with 1950s steel casement and aluminum sliders still in service. With San Mateo's Moderate Peninsula: summer highs 70-82°F, winter lows 40-48°F, material selection in Aragon requires local expertise.
Sugarloaf
In Sugarloaf, homes are predominantly pre-war Colonials and Tudors in Baywood. Energy code CZ3 requires U-factor 0.30. Our crews are familiar with Sugarloaf's architectural character and building requirements.
Hillsdale
Hillsdale's mid-century homes commonly have original aluminum-frame windows that are drafty and inefficient. Modern vinyl or fiberglass replacements with dual-pane Low-E glass dramatically improve comfort and reduce energy costs.
San Mateo Park
San Mateo Park's historic homes require window replacements that maintain architectural authenticity. We source period-appropriate window styles with modern performance features, preserving this prestigious San Mateo neighborhood's character.
Baywood
Baywood homeowners benefit from energy-efficient windows that reduce heat loss on foggy days and block UV on sunny ones. We recommend Low-E dual-pane windows suited to the neighborhood's varied sun exposure under its tree canopy.
Project Management How Hamilton Exteriors
How Hamilton Exteriors
Manages Your Window Replacement
Opening Measurements
We measure each opening and review frame conditions, drainage, egress, safety glass, and trim before ordering.
Window and Glass Selection
Your proposal identifies the manufacturer, operating style, frame, glass package, energy rating, finish, hardware, and installation method.
Flashing and Installation
We coordinate removal, opening repairs, sill and perimeter flashing, insulation, window setting, trim, sealants, and permits.
Operation and Closeout
We test operation and locks, check sealants and finishes, complete cleanup, and review applicable product and workmanship warranties.
Google rating 4.6 ★ from 47 public reviews
Window Project Reviews
Verified public reviews from homeowners who hired Hamilton Exteriors.
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Renee D.
via HomeAdvisor
I scheduled to have someone come give me an estimate for all new windows in our 1950s home with not so great Remodeling work by previous owners. Alex Li promptly met with us & his crew throughout the entire process. They were always on time to work, left our home clean of debris & spectacular new JeldWin windows. Helped me with getting Financing as well...Just all around a great experience & highly recommend!
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Ethan W.
via HomeAdvisor
I recently hired Hamilton Exteriors to replace my siding and windows, and they did a fantastic job. Their team was punctual, polite, and paid close attention to detail. The siding looks seamless, and the new windows have made a noticeable difference in both appearance and energy efficiency. Communication was always clear, and they finished on time and within budget. I’m very happy with their work and would definitely recommend them.
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Robert H.
via Angi
From the very first consultation, we knew we'd made the right choice. The team was knowledgeable and genuinely listened to our concerns about energy efficiency and design. We've already noticed a drop in our energy bills.
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H.T.
via Google
I had a great experience working with Hamilton exteriors. From start to finish, their team was professional, responsive, and detail-oriented. They made the entire process smooth and stress-free, keeping me updated every step of the way. The quality of their work really stands out. Everything was done efficiently and exceeded my expectations. If you’re looking for a reliable company that takes pride in what they do, I highly recommend them!
Google rating: 4.6/5 from 47 public reviews
Read reviews on Google Premium Market
Windows Costs in San Mateo
$500–$1,000 per window
Median home value in San Mateo: $1,600,000
Prices reflect San Mateo's premium market and San Mateo County labor rates. Actual costs depend on home size, materials, and project complexity. We provide free, itemized estimates with no hidden fees.
Get Your EstimateCompare Broad Window Operation Types
Swipe to compare all options.
| Feature | Single Hung | Double Hung | Casement | Slider | Picture |
|---|---|---|---|---|---|
| Operation | Lower sash moves | Both sashes move | Hinged sash opens | One sash slides | Fixed glass |
| Ventilation path | Lower opening | Upper and lower openings | Full sash opening | Half of frame opening | None |
| Clearance review | Interior access | Interior access | Exterior swing area | Track and meeting rail | Glass and trim access |
| Main detail focus | Sash balance and seal | Two sash seals | Hardware and compression seal | Track and drainage | Glass, frame, and flashing |
| Dedicated guide | Single hung | Double hung | Casement | Single slider | Picture window |
Window Financing
Plan Your Window Replacement With Approved Credit
Financing may be available for eligible multi-window and whole-home replacement projects with approved credit. During your window consultation, we review the product and installation scope, then explain current lender programs, terms, and payment timing.
Ask which current options fit your window replacement project.
Call Now (650) 977-3351 Frequently Asked Questions
Didn't find the answer to your question? Call Now (650) 977-3351
What areas do you serve?
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.
How does billing and financing work?
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.
Are you licensed and insured?
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.
Do I need a permit for my exterior project?
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.
How much do replacement windows cost in San Mateo?
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.
What window style is best for San Mateo homes?
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.
How long does window replacement take in San Mateo?
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.
Are energy-efficient windows worth it in San Mateo?
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.
Does Hamilton Exteriors install bay windows in San Mateo?
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.
Your Next Step
Plan Your Project With a Clear Scope
Financing may be available with approved credit for eligible projects.
Tell us about your project. We usually call within 3–5 minutes to schedule the next step.
21634 Redwood Rd Unit F, Castro Valley, CA 94546
Serving 88 cities across the Bay Area, Greater Sacramento, and Central Valley. Explore all service areas →