Roofing
Roof inspections, repairs, and replacements planned around condition, drainage, ventilation, material choice, and permits.
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Home Remodeling Contractor in Napa
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What We Build 
Available Services in Napa
Siding
Exterior wall planning for cladding, weather barriers, flashing, trim, moisture damage, and required permits.
Windows
Window replacement based on opening measurements, frame condition, glass needs, flashing, efficiency, and installation method.
ADUs
Property feasibility, design, permits, utilities, and construction planning for accessory dwelling units and garage conversions.
Additions
Planning for room extensions, second stories, structural changes, building systems, permits, and construction sequencing.
Custom Homes
Site review, architecture, engineering, permits, and construction coordination for a ground-up home.
Decks
Site, structural, material, railing, access, and permit planning for new decks and major deck renovations.
500+
Projects Completed
10+
Years Experience
50yr
Warranty Coverage
4.8
Average Rating
Google rating 4.6 ★ from 47 public reviews
What Homeowners Say About Our Work
Public reviews from Northern California homeowners.
Chandra Williams
a week ago
Roof City did an excellent job on my roof. They were professional, fast, efficient, and clean. They over- delivered on their promise to do a five- star job in two days, which included all materials and permits needed. They deserve a 10 star rating 🌟 ✨ 💫🌟✨💫🌟✨💫☀️🙌🏾😀👍🏾
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.
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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.
Local Expertise
Exterior Projects in Napa, California
The city of Napa has approximately 30,000 housing units. The historic Old Town district features homes from the late 1800s and early 1900s, while newer developments in the Browns Valley and Silverado areas have homes from the 1980s-2000s.
The City of Napa Building Division requires permits for roof replacements. Napa's inland valley location produces hot summers, and many homeowners are upgrading to reflective cool roofing to reduce energy costs.
Napa Valley's hot summers (regularly exceeding 95°F) and cool wet winters create significant thermal cycling that stresses roofing materials. Premium architectural shingles and metal roofing handle these temperature swings better than basic 3-tab products.
$750,000
Median home value
80,000
Population
60 minutes
From our office
Permit Authority
City of Napa Building Division · (707) 257-9530
Local Tip
Napa's valley floor location means dramatic temperature swings — it's not unusual to see 40°F mornings and 100°F afternoons in summer. This thermal cycling is harder on roofing than steady heat, making proper underlayment and ventilation critical.
Project Management How Hamilton Exteriors
How Hamilton Exteriors
Manages the Work
Itemized Scope
Your proposal identifies included work, selected materials, permit allowances, payment timing, and exclusions before construction.
Relevant Credentials
Hamilton Exteriors holds CSLB #1078806. We show manufacturer credentials only where they apply to the selected system.
Warranty Review
We explain the product and workmanship warranty terms that apply to your selected scope before work begins.
One Project Contact
One contact coordinates the schedule, field questions, inspections, and project closeout.
Serving Napa's Best Neighborhoods
Hamilton Exteriors has completed projects across Napa — from Browns Valley to Oxbow District. Here are some of the communities we serve.
Westwood
From energy-efficient window installations to ground-up custom homes, Westwood residents choose Hamilton Exteriors for our design-build expertise. With Napa's microclimate — Valley floor with temperature inversions trapping cold air in winter (frost) and heat in summer — material selection matters. We handle architecture, engineering, permits, and construction.
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 a general contractor cost in Napa?
General contractor rates in Napa range from $150 to $300 per hour for labor, with project costs varying by scope (Hamilton Exteriors 2024-2026 project data). A typical roof replacement runs $16,000 to $38,000. A home addition costs $250 to $600 per square foot. Hamilton Exteriors provides fully itemized estimates so you know the breakdown before work begins.
Do I need a permit for a roof replacement in Napa?
Yes. The City of Napa requires a building permit for any roof replacement. Permit fees range from $300 to $800. Your contractor should pull the permit and schedule the final inspection. We handle this for every project. See the Napa Building Division for details.
What roofing materials are best for Napa's fire zone?
Class A fire-rated materials are required in Napa's WUI zones. The most common choices are asphalt shingles (GAF Timberline HD
How long does an ADU take to build in Napa?
A typical ADU in Napa takes 6 to 12 months from design through final inspection. The permitting process alone takes 4 to 8 weeks under California's ministerial approval rules. Construction takes 4 to 8 months depending on size and complexity.
Does Hamilton Exteriors serve other Napa County cities?
Yes. We serve all of Napa County, including American Canyon, St. Helena, Calistoga, and unincorporated areas. See our Napa County service area page for the full list.
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 →