Looking for a reliable contractor in Campbell? Hamilton Exteriors is an architect-led design-build firm serving Campbell homeowners with roofing, siding, windows, ADUs, home additions, and custom homes. We bring an architect's eye to every project, with fully itemized estimates and a 50-year system warranty on qualifying installations.
Call us at (650) 977-3351 or Get Your Free Quote to discuss your project.
Why Campbell Homeowners Choose Hamilton Exteriors
Campbell sits at the heart of Santa Clara County, with a mix of mid-century ranches, Eichler-style homes, and newer custom builds. The city's climate — hot summers that regularly hit 95°F and mild winters — demands exterior materials that handle thermal expansion and UV exposure without premature failure. The proximity to the San Andreas and Calaveras faults means seismic resilience is a real consideration for any structural work.
Our approach is different from most Campbell contractors. We are led by Alex Hamilton Li, a licensed architect and general contractor (CSLB #1078806). That means every project is evaluated for design, structural integrity, energy performance, and code compliance — not just whether the materials are installed correctly. We have completed over 500 projects across the Bay Area, including dozens in Santa Clara County.
Our Services in Campbell
Roofing
Campbell homes face specific roofing challenges. The hot summer sun accelerates granule loss on asphalt shingles, and the region's occasional heavy rain events test flashing and underlayment. If your home is in the foothills near Los Gatos or Saratoga, you may be in a Very High Fire Hazard Severity Zone (FHSZ) designated by CAL FIRE, which requires Class A fire-rated roofing materials.
We install:
- Asphalt shingles from GAF, CertainTeed, and Owens Corning. A typical Campbell roof replacement on a 2,000 sq ft home runs $19,500 to $24,000, including tear-off, underlayment, flashing, and permit. See our roof replacement cost guide for details.
- Metal roofing in standing seam, corrugated, and stone-coated steel. $1,200 to $1,800 per square installed. Metal's Class A fire rating and 40- to 70-year lifespan make it a strong choice for fire-prone areas.
- Tile roofing in clay and concrete. $1,500 to $2,500 per square. Common on Mediterranean-style Campbell homes. Requires structural assessment due to weight.
We are a GAF Master Elite contractor, a designation held by fewer than 3% of roofing contractors nationwide. This allows us to offer GAF's 50-year system warranty on qualifying installations.
Siding
Campbell's climate — warm days, cool nights, and moderate humidity — is ideal for fiber cement siding. We are a James Hardie Elite Preferred Contractor, certified to install their full product line.
- James Hardie fiber cement: $8 to $14 per square foot installed (Hamilton Exteriors 2024-2026 project data). Resists warping, cracking, and insect damage. Available in HardiePlank lap siding, HardiePanel vertical siding, and HardieShingle.
- Stucco repair and replacement: Common on Campbell's older homes. $6 to $12 per square foot.
- Wood siding: Cedar shingles and board-and-batten. $10 to $18 per square foot.
Siding replacement typically requires a permit from the Campbell Building Department. We handle all permit applications and inspections.
Windows
Energy-efficient windows reduce cooling costs during Campbell's hot summers. We install:
- Vinyl windows: $600 to $1,200 per window installed (Hamilton Exteriors 2024-2026 project data). Good thermal performance at a moderate price.
- Fiberglass windows: $800 to $1,600 per window. Better dimensional stability and lower expansion rate than vinyl.
- Aluminum-clad wood windows: $1,200 to $2,500 per window. Premium option for historic or custom homes.
All windows meet California Title 24 energy code requirements. We handle permit and inspection.
ADU Construction
Campbell allows accessory dwelling units (ADUs) under state law and local zoning. Typical ADU costs in Santa Clara County range from $200,000 to $450,000 depending on size and finishes. See our ADU cost guide for a full breakdown.
We handle:
- Detached ADUs: 400 to 1,200 sq ft. $250 to $400 per square foot (Hamilton Exteriors 2024-2026 project data).
- Attached ADUs: $200 to $350 per square foot.
- Garage conversions: $80,000 to $150,000.
Permit fees for ADUs in Campbell are typically $2,000 to $5,000 (Hamilton Exteriors 2024-2026 project data). We manage the entire process from design through final inspection.
Home Additions
Adding square footage to a Campbell home requires careful planning for seismic bracing, foundation work, and energy code compliance. Typical costs:
- Ground-floor addition: $250 to $400 per square foot (Hamilton Exteriors 2024-2026 project data).
- Second-story addition: $350 to $550 per square foot.
- Room addition (400 sq ft): $100,000 to $220,000.
See our home addition cost guide for detailed pricing.
Custom Homes
We build custom homes from the ground up, handling everything from site planning and foundation through finishes. Campbell's residential zones allow single-family homes on lots of 6,000 sq ft or larger. Custom home costs in Santa Clara County typically range from $350 to $600 per square foot (Hamilton Exteriors 2024-2026 project data).
Decks
Campbell permits decks that are over 30 inches above grade or attached to a structure. We build:
- Composite decking (Trex, TimberTech): $35 to $55 per square foot (Hamilton Exteriors 2024-2026 project data).
- Pressure-treated wood: $25 to $40 per square foot.
- Ipe or hardwood: $45 to $70 per square foot.
Campbell Building Permits and Codes
Every exterior project in Campbell requires a building permit. The Campbell Building Department handles plan review and inspections. Key requirements:
- Roofing: Permit required for full replacement. Fees $400 to $800 (Hamilton Exteriors 2024-2026 project data). Inspection after tear-off and after completion.
- Siding: Permit required for replacement over 100 sq ft. Fees $200 to $500.
- Windows: Permit required for replacement. Fees $150 to $300 per window.
- ADUs: Plan review required. Fees $2,000 to $5,000 depending on size.
- Additions: Full plan review and structural calculations. Fees $1,000 to $4,000.
We pull all permits and schedule all inspections. We do not recommend skipping permits — unpermitted work can create issues at sale and may not be covered by insurance.
Campbell Climate and Construction Considerations
Campbell's Mediterranean climate — hot, dry summers and mild, wet winters — affects material choices:
- Roofing: Asphalt shingles should have a Class A fire rating and a minimum 130 mph wind warranty. Cool-roof coatings can reduce attic temperatures by 10 to 15 degrees.
- Siding: Fiber cement handles thermal cycling better than wood. Stucco should be inspected for cracks after seismic events.
- Windows: Double-pane, low-E glass with U-factor below 0.30 meets Title 24. South- and west-facing windows benefit from solar heat gain coefficient (SHGC) of 0.25 or lower.
- Foundations: Campbell's alluvial soils can settle over time. Additions and ADUs require soil reports and engineered foundations.
Fire Risk in Campbell and Surrounding Areas
While Campbell itself is not in a designated Very High Fire Hazard Severity Zone, the nearby foothills of Los Gatos, Saratoga, and Cupertino are. Homes in those areas — and Campbell properties near the foothills — should consider:
- Class A fire-rated roofing (asphalt, metal, tile)
- Ember-resistant vents (1/8-inch mesh)
- Non-combustible siding (fiber cement, stucco, metal)
- Defensible space clearance per CAL FIRE guidelines
If your Campbell home is within 1,000 feet of a WUI zone, your insurance company may require these upgrades. We can advise on compliance.
Get Started on Your Campbell Project
Ready to discuss your roofing, siding, windows, ADU, addition, or custom home project in Campbell? Alex Hamilton Li and the Hamilton Exteriors team are here to help. We provide architect-led design-build services with transparent pricing, a 50-year system warranty on qualifying installations, and a commitment to quality that has earned us a 4.8 Google rating across 500+ projects.
Call (650) 977-3351 or Get Your Free Quote today.
