Fog condensation moderate. View preservation less critical than hillside cities. Many homeowners upgrading 1960s single-pane aluminum near Highway 101 for noise reduction.
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Window Replacement Contractor in Larkspur
500+ projects
Since 2018
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For local cost factors and planning, read our Window replacement cost guide for Larkspur.
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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
Licensed, bonded, and insured
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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.
Larkspur's housing stock spans 8% pre-1940, 20% 1940-1959, 35% 1960-1979. Architectural styles range from 1950s-60s California ranch homes in Greenbrae to postwar subdivisions in Bon Air and Murray Park. 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 Larkspur Neighborhoods
Local planning starts with the site, neighborhood context, access, and applicable city review.
Baltimore Park
Baltimore Park homeowners frequently choose Hamilton Exteriors for windows. Fog condensation moderate. With Larkspur's Moderate fog, shielded from direct Pacific exposure, material selection in Baltimore Park requires local expertise.
Murray Park
In Murray Park, homes are predominantly postwar subdivisions in Bon Air and Murray Park. View preservation less critical than hillside cities. Our crews are familiar with Murray Park's architectural character and building requirements.
Greenbrae
Greenbrae's midcentury ranch homes typically have single-pane aluminum windows that waste energy. We upgrade to dual-pane, Low-E vinyl or fiberglass units that meet Title 24 standards and cut heating costs in Marin's cool, foggy winters.
Bon Air
Bon Air homeowners choose energy-efficient replacement windows to improve comfort and reduce utility bills. Our installations include proper sealing and flashing to handle Larkspur's heavy rainfall while maximizing natural light.
Downtown Larkspur
Downtown Larkspur's older buildings often have original wood-frame windows that are drafty and inefficient. We replace them with historically sympathetic profiles in modern materials that preserve the downtown streetscape aesthetic.
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 Larkspur
$800–$1,500+ per window
Median home value in Larkspur: $1,800,000
Prices reflect Larkspur's premium market and Marin 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 Does Window Replacement Cost in Larkspur?
The estimate depends on the number and dimensions of windows, selected products, and installation work. Ask for each opening to be listed with its frame, glass, trim, and any repairs. A whole-home example does not establish the cost for your property.
What Window Styles Work Best for Larkspur Homes?
### Casement Windows for Coastal Homes Casement windows are the strongest choice for Larkspur's coastal climate. They seal with a compression gasket on all four sides, creating the tightest seal of any operable window style. This makes them the most resistant to air and moisture infiltration — critical in a fog belt climate. Casement windows also capture prevailing winds from the bay, providing natural ventilation that reduces reliance on air conditioning.
Do You Need a Permit for Window Replacement in Larkspur?
Confirm the proposed replacements with the City of Larkspur Building Division before ordering. Provide the window schedule and describe any changes to openings or operation. Ask which permit, drawings, energy documentation, and inspections apply, and verify the current fees for your scope.
How long does window replacement take in Larkspur?
A typical Larkspur home with 10 to 15 windows takes 1 to 3 days for installation. Each window takes approximately 45 to 90 minutes to remove, prep, install, insulate, flash, and trim. If structural modifications are needed — such as widening an opening for a larger window — add 1 day per modified opening.
What is the best window material for Larkspur's coastal climate?
Fiberglass is the strongest choice for Larkspur's salt-air environment. It does not corrode like aluminum, rot like wood, or warp like vinyl in direct sun. Fiberglass frames from manufacturers like Milgard and Marvin carry 50-year warranties and are the most durable option for coastal homes. Vinyl is a good mid-range option — it resists corrosion but can expand and contract more than fiberglass in temperature swings.
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
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