Roofing
Roof inspections, repairs, and replacements planned around condition, drainage, ventilation, material choice, and permits.
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Home Remodeling Contractor in Mill Valley
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What We Build 
Available Services in Mill Valley
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.
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.
Local Expertise
Exterior Projects in Mill Valley, California
Mill Valley's hillside location and proximity to redwood forests create unique roofing challenges. Homes nestled among trees deal with increased debris accumulation, moisture retention, and limited sun exposure that can promote moss and algae growth.
Mill Valley is within a high fire severity zone. The city requires Class A fire-rated roofing materials for all new and replacement roofs. Composite and metal roofing are popular choices that meet both the fire code and the city's aesthetic standards.
All of Mill Valley is classified as a Very High Fire Hazard Severity Zone. Class A fire-rated roofing is mandatory. The city also requires vegetation management within 100 feet of structures and ember-resistant vents.
$1,800,000
Median home value
15,000
Population
45 minutes
From our office
WUI Zone
Fire-rated materials required
Permit Authority
City of Mill Valley Building Division · (415) 388-4033
Local Tip
Mill Valley's canopy cover means many roofs rarely dry out completely during winter months. Zinc or copper ridge strips that inhibit moss and algae growth are a worthwhile add-on — they can prevent the biological damage that shortens roof life by 5-10 years in shaded environments.
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 Mill Valley's Best Neighborhoods
Hamilton Exteriors has completed projects across Mill Valley — from Tamalpais Valley to Downtown Mill Valley. Here are some of the communities we serve.
Alto
From energy-efficient window installations to ground-up custom homes, Alto residents choose Hamilton Exteriors for our design-build expertise. With Mill Valley's microclimate — Heavy fog May-September, burns off by mid-morning but returns late afternoon — 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 Mill Valley?
General contractor costs in Mill Valley vary by project scope. For a roof replacement on a 2,000 sq ft home, expect $18,000 to $28,000 for asphalt shingles (Hamilton Exteriors 2024-2026 project data). For a siding replacement on a similar home, $12,000 to $25,000. For a 500 sq ft ADU, $200,000 to $400,000. Every Hamilton Exteriors estimate is fully itemized so you see exactly where your money goes.
Do I need a permit for a roof replacement in Mill Valley?
Yes. The City of Mill Valley Building Department requires a permit for any roof replacement. Permit fees run $400 to $900. Your contractor should pull the permit and schedule the required inspections. We handle this for every project.
What roofing materials are required in Mill Valley's fire zones?
Homes in Mill Valley's WUI High or Very High FHS
How long does a home addition take in Mill Valley?
A typical single-story addition of 200 to 400 square feet takes 4 to 6 months from permit approval to completion, depending on complexity, weather, and material availability. Second-story additions take 6 to 9 months. Plan review by the city adds 2 to 6 weeks before construction can begin.
Does Hamilton Exteriors serve other Marin County cities?
Yes. We serve all of Marin County, including San Rafael, Sausalito, Tiburon, Novato, Ross, Fairfax, Larkspur, Corte Madera, and more. See our Marin 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 →