Roofing
Full roof replacements and repairs with GAF-certified shingles and a 50-year warranty. Most jobs done in 3–5 days.
Now Booking Summer 2026 — Schedule Your Consultation
CSLB #1078806 · Architect & General Contractor · Building Northern California homes since 2018
We'll call you within 3–5 minutes to schedule your inspection.
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Factory-certified by our manufacturer partners
Full roof replacements and repairs with GAF-certified shingles and a 50-year warranty. Most jobs done in 3–5 days.
James Hardie fiber cement siding that protects your home and looks great for decades. We handle dry rot repair and full replacements.
Energy-efficient window replacements that transform comfort and curb appeal. Double-hung, casement, bay, and more.
Detached ADUs, garage conversions, and junior ADUs. Design, permits, and construction from start to finish.
Ground-up custom home construction tailored to your vision. From foundation to finishing touches.
Seamless room additions that match your home’s existing style. We handle permits, design, and construction.
Real reviews from verified Northern California homeowners.
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.
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!
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.
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.
Every estimate is itemized line by line — materials, labor, permits, cleanup. You see exactly where your money goes before we start.
Every crew member is manufacturer-certified and vetted — licensed, bonded, insured, and background-checked before they touch your home.
50-year manufacturer warranty backed by our own workmanship guarantee for the full duration. If anything fails, we fix it — free.
One dedicated point of contact from first call to final walkthrough. You’ll always know who to reach.
Didn't find the answer to your question? Call Now (650) 977-3351
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.
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.
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.
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.
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 →