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Hamilton Exteriors — Northern California roofing, siding, and exterior remodeling
4.8-star rated by 39 verified Northern California homeowners

CSLB #1078806 · Architect & General Contractor · Building Northern California homes since 2018

Window Contractor in Lafayette

Serving Lafayette & Contra Costa County
Licensed & Insured
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Hamilton Exteriors provides professional windows services in Lafayette, California. Licensed under CSLB #1078806, we handle all Lafayette building permits and inspections. Call (650) 977-3351 for an estimate.

Local Expertise

Windows in Lafayette: What Local Homeowners Need to Know

Large picture windows on mid-century ranch homes — expensive to replace. Premium market supports Marvin and Andersen. Low-SHGC critical given inland heat.

Lafayette's climate — sheltered inland valley with summer highs 88-98°F, Diablo winds funnel through Reliez Valley gap with gusts to 60 mph — directly impacts windows performance and material selection. The most common issues we address in Lafayette include aging 1950s-60s roofing stock on second or third replacement cycle and original wood shake needing fire-safe conversion on hillside homes. Hamilton Exteriors selects materials proven for Lafayette's Title 24 Climate Zone 12 conditions and backs every installation with our 50-year warranty.

Lafayette's housing stock spans 5% pre-1940, 15% 1940-1959, 40% 1960-1979. Architectural styles range from 1950s-60s California ranch and split-levels on quarter- to half-acre lots in Burton Valley to 1930s-40s cottages near downtown. 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.

Lafayette sits in a valley that traps summer heat (high 90s) while its hillside properties face significant wildfire risk as part of the Lamorinda fire zone. Energy-efficient windows with Low-E coatings and proper SHGC ratings are essential for maintaining comfortable indoor temperatures and managing cooling costs in Lafayette.

Lafayette features large-lot homes from the 1950s-70s alongside custom hillside estates, with median home values exceeding $2 million in this affluent Lamorinda community. 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 Lafayette Building Department handles permits with care for hillside development regulations and fire-safe construction requirements, typically in 4-6 weeks. Hamilton Exteriors (CSLB #1078806) ensures all Lafayette window installations meet California Title 24 energy standards and processes permits through the local building department.

Factory-certified by our manufacturer partners

Owens Corning Preferred Contractor
CertainTeed ShingleMaster
GAF Master Elite Contractor
Tesla Powerwall Certified
James Hardie Elite Preferred
Rated 4.8 ★ from 39 Verified Northern California Homeowners

What Homeowners Say About Our Work

Real reviews from verified Northern California homeowners.

deborah maxey, Hamilton Exteriors customer

deborah maxey

in the last week

Great job and very professional the 1st photo is before and the other 2 is upon completion of work.

E

Eric W.

via Yelp

Hamilton Exteriors did an amazing job on my roof. The team was professional, and the quality of work was top-notch. Highly recommend!

R

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.

L

Laura G.

via Nextdoor

Hamilton Exteriors repaired extensive dry rot damage on our home's exterior. Their attention to detail and commitment to quality were evident throughout the project. Our home looks better than ever.

Northern California home with financing options available through Hamilton Exteriors
Financing Options

Financing Options Available For Everyone

Most Northern California exterior projects range from $15,000 for a standard roof replacement to $600,000 for a custom ADU — and paying out of pocket isn't the only option. Hamilton Exteriors partners with multiple lending providers to 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. Whether you're replacing a roof, upgrading siding, or building an ADU, your project manager will walk you through every payment option during your free estimate so you can choose what fits your budget.

Ask about same-as-cash plans during your estimate.

Premium Market

Windows Costs in Lafayette

$800–$1,500+ per window

Median home value in Lafayette: $1,900,000

Prices reflect Lafayette's premium 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 Estimate

Rated 4.8 stars by Northern California homeowners across BBB, Trustpilot, Google, and Yelp

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Rated 4.8/5.0

What Window Styles Are Available?

Single Hung by Hamilton Exteriors in Northern California

Single Hung

A single-hung window features a fixed upper sash and a movable lower sash that slides vertically. It's space-efficient, easy to use, and offers great ventilation with a classic, versatile design.

Single Slider by Hamilton Exteriors in Northern California

Single Slider

A single slider window has one fixed pane and one sliding pane for easy horizontal operation. It's space-efficient, versatile, and offers excellent ventilation with a modern look.

Sliding Glass Doors by Hamilton Exteriors in Northern California

Sliding Glass Doors

A sliding glass door features large glass panels that glide smoothly on tracks, offering easy access, natural light, and a sleek, space-saving design.

Picture Windows by Hamilton Exteriors in Northern California

Picture Windows

A picture window is a large, fixed-pane window that provides expansive views and abundant natural light. Its clean, modern design enhances any space while improving energy efficiency.

Double Hung by Hamilton Exteriors in Northern California

Double Hung

A double-hung window has two movable sashes that slide vertically, offering versatile ventilation and easy cleaning. Its classic design fits a variety of architectural styles.

Casement Windows by Hamilton Exteriors in Northern California

Casement Windows

A casement window features a single sash that opens outward on side hinges, operated by a crank mechanism. It provides excellent ventilation, unobstructed views, and a tight seal for superior energy efficiency.

Neighborhoods We Serve

Windows Across Lafayette Neighborhoods

Downtown Lafayette

Downtown Lafayette homeowners frequently choose Hamilton Exteriors for windows. Large picture windows on mid-century ranch homes — expensive to replace. With Lafayette's Summer average 90°F with 5-10 days above 100°F, material selection in Downtown Lafayette requires local expertise.

The Trails

In The Trails, homes are predominantly 1930s-40s cottages near downtown. Premium market supports Marvin and Andersen. Our crews are familiar with The Trails's architectural character and building requirements.

Reliez Valley

From Reliez Valley to Downtown Lafayette, Lafayette homeowners trust Hamilton Exteriors for windows that stands up to sheltered inland valley with summer highs 88-98°F. We handle permits, engineering, and installation — you get a single point of contact.

Happy Valley

Many Happy Valley homes in Lafayette still have single-pane aluminum windows from original construction. Dual-pane vinyl or fiberglass replacements reduce energy costs and improve comfort immediately.

Burton Valley

Burton Valley 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.

Trails

Window replacement in Trails often reveals issues with framing or flashing that need correction. We address these during installation to prevent future water intrusion.

Our Advantage

Why Choose
Hamilton Exteriors?

Transparent Pricing

Every estimate is itemized line by line — materials, labor, permits, cleanup. You see exactly where your money goes before we start.

Factory Trained Installers

Every crew member is manufacturer-certified and vetted — licensed, bonded, insured, and background-checked before they touch your home.

50-Year Warranty

50-year manufacturer warranty backed by our own workmanship guarantee for the full duration. If anything fails, we fix it — free.

Your Own Project Manager

One dedicated point of contact from first call to final walkthrough. You’ll always know who to reach.

Our Latest Projects

Powered by BackOffice
Architectural Shingle Roof Replacement in Antioch Roofing

Architectural Shingle Roof Replacement

Location

Antioch

Products

GAF Architectural Shingles

Completed

Jun 25, 2026

Architectural Shingle Roof Replacement in Fremont Roofing 3

Architectural Shingle Roof Replacement

Location

Fremont

Products

GAF Architectural Shingles

Completed

Jun 10, 2026

Architectural Shingle Roof Replacement in Fremont — photo 2Architectural Shingle Roof Replacement in Fremont — photo 3
New Roof Installation in Hayward Roofing

New Roof Installation

Location

Hayward

Products

GAF Architectural Shingles

Completed

Jun 5, 2026

Full Roof Replacement in Walnut Creek Roofing

Full Roof Replacement

Location

Walnut Creek

Products

GAF Architectural Shingles

Completed

Jun 2, 2026

James Hardie Siding Installation in Pleasanton Siding

James Hardie Siding Installation

Location

Pleasanton

Products

James Hardie

Completed

May 28, 2026

GAF Roof Replacement in Oakland Roofing

GAF Roof Replacement

Location

Oakland

Products

GAF Architectural Shingles

Completed

May 15, 2026

Architectural Roof Replacement in Berkeley Roofing

Architectural Roof Replacement

Location

Berkeley

Products

GAF Architectural Shingles

Completed

Apr 10, 2026

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 (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.

How does billing and financing work?

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.

Are you licensed and insured?

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.

Do I need a permit for my exterior project?

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.

How much do replacement windows cost in Lafayette?

Replacement windows in Lafayette 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 Lafayette?

Lafayette 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 Lafayette homes?

We offer casement, double-hung, sliding, bay, and picture windows to match Lafayette's diverse architecture. Our design team helps select styles that complement your home's character.

What are Lafayette's Title 24 window requirements?

California Title 24 energy standards require specific U-factor and SHGC ratings for replacement windows in Lafayette. All windows we install meet or exceed current Title 24 requirements.

How long does window replacement take in Lafayette?

Most window replacement projects in Lafayette take 1-3 days for installation, with 4-6 weeks lead time for custom orders. We install with minimal disruption to your daily routine.

Do I need permits for window replacement in Lafayette?

Permits are required in Lafayette when changing window size or type, or for energy compliance verification. We handle all permitting as part of our installation service.

Can new windows reduce noise in Lafayette?

Dual-pane and triple-pane windows significantly reduce exterior noise in Lafayette. Homeowners near busy roads or commercial areas notice an immediate improvement in indoor quiet.

Are there rebates for new windows in Lafayette?

Lafayette homeowners may qualify for federal energy tax credits up to $600 per year and local utility rebates for Energy Star-rated windows. We help identify all available incentives.

What is Low-E glass and do I need it in Lafayette?

Low-E coatings reflect infrared heat while allowing visible light through. Given Lafayette's hot summers, Low-E glass is essential for keeping your home cool and reducing AC costs.

What window brands do you install in Lafayette?

We install Milgard, Andersen, and Marvin windows in Lafayette. Each offers distinct advantages in energy efficiency, style options, and warranty coverage for California climates.

Ready to start? (650) 977-3351

Call now — we pick up in minutes. Or fill out the form above and we'll call you.

21634 Redwood Rd Unit F, Castro Valley, CA 94546

Serving Oakland, Berkeley, Fremont, San Jose, Palo Alto, Walnut Creek, San Rafael, Napa, Redwood City & more across Alameda, Contra Costa, Marin, Napa, San Mateo & Santa Clara counties. All 47 cities →