West-facing windows are biggest energy penalty — SHGC 0.22 or lower critical. Many 2000s homes have failing builder-grade vinyl seals. Vinyl frames dominate at this price point. Dual-pane low-E mandatory.
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Window Replacement Contractor in Brentwood
500+ projects
Since 2018
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Send your window count and project details. We will schedule measurements and review the product and installation options with you.
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Customer-Service Obsessed
Responsive from consultation through project closeout
Architect and general contractor
One accountable team
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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.
Brentwood's housing stock spans 5% pre-1980, 15% 1980-1994, 40% 1995-2009. Architectural styles range from 1990s-2000s two-story stucco production homes in Shadow Lakes and Deer Ridge to 2000s-2010s Mediterranean and California Contemporary in master-planned communities. 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.
Brentwood experiences some of Contra Costa County's most extreme heat, with summer temperatures regularly exceeding 105 degrees, putting severe stress on exterior materials. Energy-efficient windows with Low-E coatings and proper SHGC ratings are essential for maintaining comfortable indoor temperatures and managing cooling costs in Brentwood.
Brentwood has grown rapidly since the early 2000s, with most housing stock being newer master-planned communities featuring stucco exteriors and tile roofs. Median home prices are around $780,000. Many of these homes retain original single-pane aluminum windows that are inefficient and drafty. Modern dual-pane replacements typically reduce energy costs by 15-25%.
The City of Brentwood Building Division processes permits for this fast-growing community, with typical turnaround of 3-5 weeks for standard residential projects. Hamilton Exteriors (CSLB #1078806) ensures all Brentwood window installations meet California Title 24 energy standards and processes permits through the local building department.
Neighborhoods We Serve
Windows Across Brentwood Neighborhoods
Local planning starts with the site, neighborhood context, access, and applicable city review.
Balfour
Balfour homeowners frequently choose Hamilton Exteriors for windows. West-facing windows are biggest energy penalty — SHGC 0.22 or lower critical. With Brentwood's Summer average 95°F with 25+ days above 100°F — hottest CCC city, material selection in Balfour requires local expertise.
Harvest Park
In Harvest Park, homes are predominantly 2000s-2010s Mediterranean and California Contemporary in master-planned communities. Many 2000s homes have failing builder-grade vinyl seals. Our crews are familiar with Harvest Park's architectural character and building requirements.
Summerset
Many Summerset homes in Brentwood still have single-pane aluminum windows from original construction. Dual-pane vinyl or fiberglass replacements reduce energy costs and improve comfort immediately.
Shadow Lakes
Shadow Lakes properties near busy corridors benefit significantly from noise-reducing dual or triple-pane windows. The improvement in indoor quiet is one of the most-appreciated upgrades.
Deer Ridge
Window replacement in Deer Ridge often reveals issues with framing or flashing that need correction. We address these during installation to prevent future water intrusion.
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 Mid Market
Windows Costs in Brentwood
$450–$800 per window
Median home value in Brentwood: $810,000
Prices reflect Brentwood's mid market and Contra Costa 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 Brentwood?
Replacement windows in Brentwood typically cost $500-$1,200 per window installed, depending on size, style, and energy rating. Whole-home projects of 10-15 windows range from $8,000 to $20,000.
How much can new windows save on energy bills in Brentwood?
Brentwood homeowners typically see 15-25% reduction in heating and cooling costs with dual-pane Low-E windows. This is especially impactful given the area's hot summers.
What window styles work for Brentwood homes?
We offer casement, double-hung, sliding, bay, and picture windows to match Brentwood's diverse architecture. Our design team helps select styles that complement your home's character.
What are Brentwood's Title 24 window requirements?
California Title 24 energy standards require specific U-factor and SHGC ratings for replacement windows in Brentwood. All windows we install meet or exceed current Title 24 requirements.
How long does window replacement take in Brentwood?
Most window replacement projects in Brentwood take 1-3 days for installation, with 4-6 weeks lead time for custom orders. We install with minimal disruption to your daily routine.
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 →