CSLB #1078806 · Architect & General Contractor · Building Bay Area homes since 2018
Serving 6 Counties Across the Bay Area
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Factory-certified by our manufacturer partners
6
Counties Served
500+
Projects Completed
50-Year
Warranty Coverage
4.8
Google Rating
Service Areas
6 Counties. 47 Cities. One Standard.
Licensed, bonded, and insured across the San Francisco Bay Area, California. Find your county below to see what we're building near you.
We operate from Castro Valley, CA (Alameda County) and serve homeowners in Alameda, Contra Costa, Marin, Napa, San Mateo, and Santa Clara counties only. We do not serve Hamilton, Ontario or areas outside Northern California.
Alameda County, CA
Oakland · Fremont · Hayward · Berkeley · San Leandro · Dublin · Pleasanton · Livermore · Union City · Alameda · Castro Valley
Contra Costa County, CA
Antioch · Walnut Creek · Concord · San Ramon · Richmond · Lafayette · Orinda · Danville · Brentwood · Pittsburg
Napa County, CA
Napa · American Canyon · St. Helena · Calistoga · Yountville
Santa Clara County, CA
San Jose · Palo Alto · Mountain View · Sunnyvale · Cupertino · Santa Clara · Saratoga · Los Gatos · Campbell · Milpitas
Marin County, CA
Larkspur · Mill Valley · Novato · San Rafael
San Mateo County, CA
Redwood City · San Mateo · Burlingame · Daly City · South San Francisco
What We Build 
Custom Home & Exterior Services in the Bay Area
Siding
James Hardie fiber cement siding that protects your home and looks great for decades. Dry rot repair, full replacements, and fresh paint.
Windows
Energy-efficient window replacements that improve your home's comfort and curb appeal. Professionally installed with a full warranty.
ADUs
Detached ADUs, garage conversions, and junior ADUs that add living space and rental income. Design, permitting, and construction under one roof.
Additions
Seamless room additions that match your home's existing style. Second stories, room extensions, and full remodels, end-to-end.
Custom Homes
Ground-up custom home construction tailored to your vision. Architect-led from foundation to finishing touches.
Ready to start? (650) 977-3351
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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 →
Rated 4.8 ★ from 37 Verified Bay Area Homeowners
What Homeowners Say About Our Work
Real reviews from verified Bay Area homeowners.
Hamilton Exteriors did an amazing job on my roof. The team was professional, and the quality of work was top-notch. Highly recommend!
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.