Roofing, Siding & Exterior Remodeling in Union City

We serve Northern California across three regions: the San Francisco Bay Area (six counties from Alameda to Santa Clara), Greater Sacramento (Sacramento out to Roseville, Folsom, and Davis), and the Central Valley (Stockton to Modesto). Our crews are based in Castro Valley. We handle permits and know the building codes for each jurisdiction, which matters because requirements and fees vary significantly between cities.

We offer $0-down financing with approved credit, 12-month same-as-cash plans, and extended terms up to 15 years for larger projects. You only pay for completed, inspected work — we never ask for full payment before the job is done. Your project manager will walk you through every option during your estimate appointment. We also accept checks, ACH, and all major credit cards.

Yes. CSLB License #1078806 — verify it anytime at cslb.ca.gov. We carry $2M general liability, full workers’ comp, and are bonded per California law. We hold GAF Master Elite, Owens Corning Preferred, CertainTeed ShingleMaster, and James Hardie Elite Preferred certifications — each requires annual training and quality audits to maintain. We’re happy to provide proof of insurance before any work begins.

Most exterior projects in Northern California require a building permit. Fees vary by city — Oakland runs $200–$600, Peninsula cities often more. We handle the entire permit process: application, plan submission, and scheduling inspections. Permit fees appear as a separate line item in your estimate so you’ll see every cost upfront. For homes in WUI fire zones (Berkeley Hills, Oakland Hills, parts of Marin), we ensure full compliance with local fire-rated material requirements.

Costs in Union City reflect the mid market and local labor rates. Roof replacements typically run $10,000–$20,000 for a standard home, siding from $18,000–$34,000, and window replacements from $450–$800 per window depending on type and frame material. ADUs range from $180,000–$400,000. With median home values at $1,050,000 in Union City, these improvements are strong investments. We provide free, itemized estimates for every project — no hidden fees.

Union City is centrally located East Bay city between Fremont and Hayward with strong BART connectivity, with housing stock that includes 1960s-70s ranch and split-level in Decoto and Alvarado, 1980s-90s two-story tracts in Hillview and Union Landing, and 2000s-2010s townhomes near Union City BART. These homes face specific challenges: aging 1960s-70s stucco and T1-11 siding reaching end-of-life, aluminum single-pane windows still prevalent on older homes, and original composition roofs on 1980s homes now past their lifespan. With median home values at $1,050,000, exterior work is a significant investment that demands a contractor who understands Union City's unique conditions. Hamilton Exteriors brings local knowledge of Alameda County building codes, Title 24 Climate Zone 4 requirements, and climate-specific material selection to every project.

We serve all Union City neighborhoods including Decoto, Alvarado, Hillview, Union Landing, Searles, and surrounding areas. With a population of 75,300, Union City has a wide range of home styles — 1960s-70s ranch and split-level in Decoto and Alvarado, 1980s-90s two-story tracts in Hillview and Union Landing, and 2000s-2010s townhomes near Union City BART. Our crews are familiar with the architectural character of each neighborhood and carry materials suited to Union City's climate: Moderate inland. Summer highs 78-90°F, winter lows 40-45°F. Minimal fog. Sheltered from strong winds. Low humidity. Annual rainfall 15-18 inches.

Union City's climate — moderate bayside-to-inland transition — warmer than Oakland (80-90°F summers) but cooler than Livermore, minimal fog, and low wildfire risk due to flat terrain — creates specific challenges for homeowners. The most common issues we see are aging 1960s-70s stucco and T1-11 siding reaching end-of-life, aluminum single-pane windows still prevalent on older homes, and original composition roofs on 1980s homes now past their lifespan. For roofing, No VHFHSZ — standard materials permitted. Climate Zone 4 cool-roof requirements. Composition shingles dominate (85%+). Many 1970s-80s homes have multiple layers requiring tear-off. Straightforward permitting: 1-2 weeks. For siding, Stucco on 65% of homes, T1-11 on many 1970s-80s tracts needing replacement. No historic preservation requirements. Hardie plank popular as T1-11 replacement. Some 1990s EIFS showing moisture damage. Hamilton Exteriors selects materials proven to perform in Union City's conditions and backs every installation with our 50-year warranty.

Yes. With Union City's median home value at $1,050,000, exterior upgrades deliver strong ROI. A new roof recoups 60-65% of its cost at resale in the Bay Area, while fiber cement siding (James Hardie) recovers up to 86%. In competitive Union City neighborhoods like Decoto and Alvarado, curb appeal directly impacts days on market and final sale price. Hamilton Exteriors helps Union City homeowners choose materials that maximize both protection and resale value.

Many older homes in Union City and Alameda County were built before modern seismic codes. While a roof replacement alone doesn't trigger a seismic retrofit requirement, it's the ideal time to reinforce roof-to-wall connections — especially for homes near the Hayward Fault. Hamilton Exteriors uses Simpson Strong-Tie hurricane clips on every roof we install, which improves earthquake resistance and meets California's latest building standards at no extra cost.

Yes. Parts of Union City and the East Bay Hills fall within Cal Fire's Very High Fire Hazard Severity Zones (VHFHSZ). Homes in these zones must use Class A fire-rated roofing materials — which includes the asphalt, metal, and tile options Hamilton Exteriors installs. If your property is in a designated fire zone, we also ensure compliant ember-resistant vents and remove combustible material within 5 feet of the roofline as part of our standard installation process.