San Ramon homeowners trust Hamilton Exteriors for architect-led design-build services. We handle roofing, siding, windows, ADUs, home additions, and custom homes across Contra Costa County. Every project is overseen by Alex Hamilton Li, a licensed architect and general contractor (CSLB #1078806).
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Why San Ramon Homeowners Choose Hamilton Exteriors
San Ramon sits at the base of the Diablo Range, where hot inland summers and wildfire risk create specific demands on home exteriors. Most contractors in the area are tradesmen-only. Hamilton Exteriors brings an architect's perspective to every project, evaluating your home as a complete system rather than just a surface to replace.
We have completed more than 500 projects across the Bay Area since 2018, including work in San Ramon and neighboring cities like Danville, Walnut Creek, and Dublin. Our GAF Master Elite certification, Owens Corning Preferred Contractor status, and James Hardie Elite Preferred Contractor designation mean we offer manufacturer-backed warranties that standard contractors cannot provide.
Our Services in San Ramon
Roofing
San Ramon's climate demands roofing materials that handle both intense summer heat and fire season. Asphalt shingles from GAF, CertainTeed, and Owens Corning are the most common choice, with architectural shingles running $940 to $1,125 per square installed (Hamilton Exteriors 2024-2026 project data). Metal roofing, at $1,200 to $1,800 per square, offers 40- to 70-year lifespans and Class A fire ratings essential for homes in the Diablo Range fire zone.
We handle all roofing materials: asphalt shingles, standing seam metal, stone-coated steel, clay and concrete tile, and designer shingles. Every roof replacement includes tear-off, synthetic underlayment, new flashing, ridge vent installation, and permit fees. Decking replacement, if needed, runs $75 to $150 per 4x8 sheet. See our roofing services page for details.
Siding
James Hardie fiber cement siding is the top choice for San Ramon homes. It resists fire, moisture, and termites better than wood or vinyl. As a James Hardie Elite Preferred Contractor, we install HardiePlank lap siding, HardiePanel vertical siding, and HardieTrim boards with the manufacturer's 30-year warranty.
Siding replacement costs $8 to $15 per square foot installed, depending on the profile and complexity. We also repair and replace trim, soffits, and fascia. See our siding services page.
Windows
Energy-efficient window replacement reduces cooling costs during San Ramon's 100-degree summer days. We install dual-pane, Low-E, argon-filled windows from premium manufacturers. Window replacement runs $800 to $2,500 per window installed, including frame, trim, and flashing (Hamilton Exteriors 2024-2026 project data).
We handle all window types: casement, double-hung, sliding, picture, and bay windows. See our window replacement page.
ADU Construction
San Ramon's zoning allows accessory dwelling units on most single-family lots. We handle the full process: design, permitting, and construction. Typical ADU costs in Contra Costa County range from $200,000 to $400,000 for a 500- to 1,200-square-foot unit, including foundation, structure, finishes, and utility connections. See our ADU construction page and ADU cost guide.
Home Additions
Adding square footage to your San Ramon home requires structural engineering, foundation work, and seamless integration with the existing structure. We design and build second-story additions, ground-floor expansions, and room additions. Costs typically range from $300 to $600 per square foot, depending on complexity. See our home additions page and home addition cost guide.
Custom Homes
For homeowners building from the ground up, we offer full design-build custom home construction. Our architect-led process covers site planning, structural design, interior finishes, and all permitting. Custom home costs in San Ramon typically start at $400 per square foot. See our custom home building page.
San Ramon Building Permits and Codes
Every exterior project in San Ramon requires a building permit from the San Ramon Building Department. Permit fees vary by project scope:
- Roof replacement: $250 to $550
- Siding replacement: $150 to $400
- Window replacement: $100 to $300 per window
- ADU: $2,000 to $5,000
- Home addition: $1,000 to $4,000
Hamilton Exteriors handles all permit applications and coordinates inspections. We know San Ramon's code requirements, including Title 24 energy standards and California's Chapter 7A fire-safe materials for homes in Very High Fire Hazard Severity Zones.
Fire Risk in San Ramon
Parts of San Ramon, particularly homes along the Diablo Range foothills, fall within CAL FIRE's State Responsibility Area Very High Fire Hazard Severity Zone (FHSZ). Homes in these zones must use Class A fire-rated roofing materials, non-combustible siding, and ember-resistant vents. We install GAF Timberline HDZ shingles (Class A fire rated), James Hardie fiber cement siding (non-combustible), and metal flashing systems that meet Chapter 7A requirements.
Climate Considerations for San Ramon Homes
San Ramon experiences hot inland summers, with temperatures regularly exceeding 100 degrees Fahrenheit. This thermal cycling causes asphalt shingles to expand and contract, accelerating granule loss and curling. Metal roofs reflect up to 70 percent of solar energy, according to research from Oak Ridge National Laboratory, reducing cooling costs by 10 to 25 percent. We recommend light-colored roofing materials and proper attic ventilation to extend roof life in San Ramon's climate.
Seismic Considerations
San Ramon sits near the Hayward Fault and Concord Fault systems. Older homes, particularly those built before 1980, may need structural reinforcement before major exterior work. We assess seismic bracing, foundation condition, and roof-to-wall connections during our initial inspection. If reinforcement is needed, we provide itemized pricing before work begins.
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Ready to start your San Ramon home exterior project? Call us at (650) 977-3351 or request a quote online. Every estimate includes itemized pricing, material options, and a project timeline.
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