Looking for a reliable contractor in Sunnyvale? Hamilton Exteriors brings architect-led design-build services to Sunnyvale homeowners. We handle roofing, siding, windows, ADUs, home additions, custom homes, and decks — all backed by a licensed architect and general contractor with CSLB #1078806.
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Why Sunnyvale Homeowners Choose Hamilton Exteriors
Sunnyvale sits at the heart of Silicon Valley, with a mix of Eichler mid-century homes, ranch-style houses, and newer custom builds. Each comes with its own set of challenges — from flat roofs on Eichlers to seismic retrofitting on older structures. As an architect-led firm, we evaluate your home as a complete system, not just a list of repairs.
Alex Hamilton Li, the founder of Hamilton Exteriors, is both a licensed architect and a general contractor. This dual credential means every project gets a design perspective that most contractors cannot offer. We think about how materials, structure, and aesthetics work together, not just whether the installation meets code.
Our Services in Sunnyvale
Roofing
Sunnyvale's hot summers — often exceeding 95 degrees Fahrenheit according to NOAA climate data — demand roofing materials that handle thermal expansion and UV exposure. We install:
- Asphalt shingles: GAF Timberline HDZ, CertainTeed Landmark, Owens Corning Duration. $15,000 to $35,000 for a typical 2,000 sq ft home (Hamilton Exteriors 2024-2026 project data).
- Metal roofing: Standing seam and stone-coated steel. $25,000 to $55,000. Ideal for fire-prone foothill areas.
- Tile roofing: Clay and concrete. $30,000 to $65,000. Common on Spanish-style homes in Sunnyvale.
All materials meet Class A fire ratings, which is critical for homes near WUI zones. See our full roofing services page for details.
Siding
Sunnyvale's climate — warm, dry summers and mild, wet winters — favors fiber cement siding. We are a James Hardie Elite Preferred Contractor, certified to install their full product line. HardiePlank and HardiePanel resist moisture, fire, and termites. Typical siding projects range from $8,000 to $30,000 depending on home size and complexity. Learn more on our siding services page.
Windows
Energy-efficient windows reduce cooling costs during Sunnyvale's hot months. We install vinyl, fiberglass, and aluminum-clad wood windows from manufacturers like Milgard, Andersen, and Pella. A full-home window replacement runs $5,000 to $25,000. See our window replacement services page.
ADUs
Sunnyvale allows accessory dwelling units under state law and local ordinance. We handle design, permitting, and construction. Typical ADU costs range from $150,000 to $400,000 depending on size and finishes. Visit our ADU construction services page.
Home Additions
Need more space? We design and build room additions, second-story additions, and bump-outs. Costs range from $80,000 to $300,000. See our home addition services page.
Custom Homes
Ground-up custom homes in Sunnyvale require careful coordination with the city's planning department. We manage the entire process from concept through occupancy. Visit our custom home building page.
Decks
Composite and wood decks that complement your home's architecture. $5,000 to $25,000. See our deck construction page.
What Makes Sunnyvale Unique for Home Exteriors
Sunnyvale sits on the alluvial plain of the Santa Clara Valley, with seismic considerations from the San Andreas, Calaveras, and Hayward faults. According to the California Geological Survey, parts of Sunnyvale fall within liquefaction zones, which can affect foundation work during additions or ADU construction.
The city's building department requires permits for most exterior work. Permit fees for a roof replacement typically run $400 to $800. For ADUs and additions, plan review fees are calculated based on project valuation. You can find current fee schedules on the Sunnyvale building permit page.
Fire risk is a consideration for homes in the western foothills near Cupertino and Los Gatos. Properties in Very High Fire Hazard Severity Zones, as designated by CAL FIRE, must use Class A fire-rated roofing materials and comply with Chapter 7A of the California Building Code.
How We Price Projects
Every estimate from Hamilton Exteriors is fully itemized. You see the cost of materials, labor, permits, and cleanup as separate line items. We quote per-square pricing for roofing (1 square = 100 sq ft) and per-unit pricing for windows and siding. This transparency lets you compare options and understand where your money goes.
Pricing ranges above include standard materials, labor, permits, and disposal. Exclusions include structural repairs, foundation work, and upgrades beyond standard specifications. We discuss these contingencies during the on-site inspection.
Why We Serve Sunnyvale
Sunnyvale is one of 47 Bay Area cities we serve across Alameda, Contra Costa, Marin, Napa, Santa Clara, and Sonoma counties. Our team knows the local building codes, permit processes, and climate conditions that affect exterior work. Whether you need a roof replacement in a 1960s ranch or a custom ADU for a growing family, we bring the same architect-led approach to every project.
Get Started in Sunnyvale
Ready to discuss your project? Call us at (650) 977-3351 or Get Your Free Quote online. We will schedule an on-site inspection and provide a fully itemized estimate.
Hamilton Exteriors 21634 Redwood Rd Unit F, Castro Valley, CA 94546 (650) 977-3351 CSLB #1078806 | GAF Master Elite | James Hardie Elite Preferred
