SFO noise impacts eastern neighborhoods — STC 30+ recommended. Older homes have original wood or aluminum single-pane. Bayside salt air makes fiberglass or vinyl preferable to aluminum.
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Window Replacement Contractor in South San Francisco
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.
South San Francisco's housing stock spans 15% pre-1940, 30% 1940-1960, 25% 1960-1985. Architectural styles range from 1920s-40s worker cottages and bungalows on Sign Hill and Old Town to 1950s-60s ranches in Westborough and Winston Manor. 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 South San Francisco Neighborhoods
Local planning starts with the site, neighborhood context, access, and applicable city review.
Sign Hill
Sign Hill homeowners frequently choose Hamilton Exteriors for windows. SFO noise impacts eastern neighborhoods — STC 30+ recommended. With South San Francisco's Split: eastern bayside 62-78°F summers, western hills 55-68°F, material selection in Sign Hill requires local expertise.
Westborough
In Westborough, homes are predominantly 1950s-60s ranches in Westborough and Winston Manor. Older homes have original wood or aluminum single-pane. Our crews are familiar with Westborough's architectural character and building requirements.
Sunshine Gardens
Sunshine Gardens homeowners replace drafty windows to improve comfort against South San Francisco's fog. Energy-efficient dual-pane windows reduce condensation, lower heating costs, and make homes more enjoyable year-round.
Buri Buri
Buri Buri families enjoy window upgrades that reduce drafts and noise. Modern replacements in these mid-century South San Francisco homes improve energy efficiency, comfort, and property value simultaneously.
Avalon
Avalon homeowners benefit from windows that handle South San Francisco's coastal conditions. We install properly sealed dual-pane units that manage fog moisture and temperature fluctuations common in this Peninsula neighborhood.
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.
H
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 Mid Market
Windows Costs in South San Francisco
$450–$800 per window
Median home value in South San Francisco: $1,100,000
Prices reflect South San Francisco's mid 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 South San Francisco?
Replacement windows in South San Francisco typically cost $400-$1,200 per window depending on size, style, and glass options. With San Mateo County energy rebates, many South San Francisco homeowners save on the total cost. We provide free in-home quotes.
What window style is best for South San Francisco homes?
The best window style depends on your home's architecture and ventilation needs. Double hung windows are our most popular in South San Francisco for their classic look and easy cleaning. For homes in Buri Buri, casement windows offer superior airflow and modern aesthetics.
How long does window replacement take in South San Francisco?
Most window replacement projects in South San Francisco 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 South San Francisco?
Absolutely. South San Francisco homeowners with dual-pane Low-E windows typically save 15-25% on energy bills. With median home prices at $1,100,000, new windows also boost resale value. Many San Mateo County utility rebates are available.
Does Hamilton Exteriors install bay windows in South San Francisco?
Yes, we install bay, bow, picture, garden, and specialty windows throughout South San Francisco and San Mateo County. Bay windows are especially popular in neighborhoods like Sign Hill 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.
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21634 Redwood Rd Unit F, Castro Valley, CA 94546
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