Hamilton Exteriors is a Los Gatos general contractor offering architect-led design-build services for homeowners across Santa Clara County. Founded by Alex Hamilton Li, a licensed architect and general contractor (CSLB #1078806), we bring a designer's eye and a builder's precision to every project. From roofing and siding to ADUs and custom additions, we handle the full scope of your home exterior.
Why Choose an Architect-Led Contractor in Los Gatos?
Most general contractors in Los Gatos are tradesmen-only. As an architect and GC, Alex evaluates your home as a complete system. He considers structural capacity, energy performance, fire safety, and aesthetics together. This approach means fewer change orders, better material choices, and a result that fits your home's character.
Our Services in Los Gatos
We provide a full range of home exterior services:
- Roofing: Asphalt shingles, metal, tile, and flat roofing. GAF Master Elite certified. See our roofing services page.
- Siding: James Hardie fiber cement siding, wood, and stucco. James Hardie Elite Preferred contractor. See our siding services page.
- Windows: Energy-efficient replacement windows from leading manufacturers. See our window replacement services page.
- ADUs: Accessory dwelling units, from garage conversions to new construction. See our ADU construction services page.
- Home Additions: Second-story additions, room expansions, and bump-outs. See our home addition services page.
- Custom Homes: Ground-up custom home construction.
Los Gatos-Specific Considerations
Los Gatos presents unique challenges that a local contractor must understand:
- Fire Risk: The Los Gatos hills are in a Very High Fire Hazard Severity Zone (FHSZ) as designated by CAL FIRE. Homes in these areas require Class A fire-rated roofing materials and Chapter 7A-compliant installation methods, including specific underlayment, edge metal, and venting.
- Climate: Los Gatos experiences hot summers, often exceeding 95°F in the valley. The foothills are cooler. This microclimate affects material selection, particularly for roofing and siding. Cool-roof materials can reduce cooling costs by 10 to 25 percent according to Oak Ridge National Laboratory.
- Seismic: The region is near the San Andreas, Calaveras, and Hayward faults. Older homes may need structural reinforcement before adding heavy materials like tile roofing.
- Permitting: The Town of Los Gatos Building Division handles all permits. Permit fees for a typical roof replacement range from $400 to $800. Your contractor should pull the permit. Visit the Los Gatos Building Department for details.
Pricing Transparency
We provide fully itemized estimates with per-square pricing. For a typical home in Los Gatos:
- Roof replacement (asphalt shingles): $19,500 to $24,000 for a 2,000 sq ft roof, including tear-off, underlayment, flashing, and permit. See our roof replacement cost guide for a full breakdown.
- ADU construction: $250,000 to $500,000 depending on size and finishes. See our ADU cost guide.
- Home addition: $300 to $600 per square foot, depending on complexity.
Get Your Free Quote
Ready to start your project? Call us at (650) 977-3351 or request your free quote online. We serve Los Gatos and all of Santa Clara County. CSLB #1078806.