Roofing
Roof inspections, repairs, and replacements planned around condition, drainage, ventilation, material choice, and permits.
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Roof inspections, repairs, and replacements planned around condition, drainage, ventilation, material choice, and permits.
Exterior wall planning for cladding, weather barriers, flashing, trim, moisture damage, and required permits.
Window replacement based on opening measurements, frame condition, glass needs, flashing, efficiency, and installation method.
Property feasibility, design, permits, utilities, and construction planning for accessory dwelling units and garage conversions.
Planning for room extensions, second stories, structural changes, building systems, permits, and construction sequencing.
Site review, architecture, engineering, permits, and construction coordination for a ground-up home.
Projects Completed
Years Experience
Warranty Coverage
Average Rating
Public reviews from Northern California homeowners.
Chandra Williams
a week ago
Roof City did an excellent job on my roof. They were professional, fast, efficient, and clean. They over- delivered on their promise to do a five- star job in two days, which included all materials and permits needed. They deserve a 10 star rating 🌟 ✨ 💫🌟✨💫🌟✨💫☀️🙌🏾😀👍🏾
Eric W.
via Yelp
Hamilton Exteriors did an amazing job on my roof. The team was professional, and the quality of work was top-notch. Highly recommend!
Robert H.
via Angi
From the very first consultation, we knew we'd made the right choice. The team was knowledgeable and genuinely listened to our concerns about energy efficiency and design. We've already noticed a drop in our energy bills.
Laura G.
via Nextdoor
Hamilton Exteriors repaired extensive dry rot damage on our home's exterior. Their attention to detail and commitment to quality were evident throughout the project. Our home looks better than ever.
Your proposal identifies included work, selected materials, permit allowances, payment timing, and exclusions before construction.
Hamilton Exteriors holds CSLB #1078806. We show manufacturer credentials only where they apply to the selected system.
We explain the product and workmanship warranty terms that apply to your selected scope before work begins.
One contact coordinates the schedule, field questions, inspections, and project closeout.
Hamilton Exteriors has completed projects across Union City — from Decoto to Eastshore. Here are some of the communities we serve.
From energy-efficient window installations to ground-up custom homes, Hillview residents choose Hamilton Exteriors for our design-build expertise. With Union City's microclimate — Moderate inland — material selection matters. We handle architecture, engineering, permits, and construction.
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We serve Northern California across three regions: the San Francisco Bay Area, Greater Sacramento, and the Central Valley. Our published guides cover 14 counties and 88 cities. Our Castro Valley and Sacramento offices support local estimating, permit coordination, and project planning across these regions.
Financing may be available for eligible projects with approved credit. Available terms depend on lender approval, project scope, and current programs. Your project manager can review the options that apply before work begins. We also accept checks, ACH, and major credit cards.
Yes. Hamilton Exteriors holds CSLB License #1078806, active general liability coverage, and the required contractor bond. We also hold GAF Master Elite and James Hardie Elite Preferred credentials. We can provide current proof of coverage before work begins.
Permit requirements depend on the project scope and local jurisdiction. Hamilton Exteriors coordinates required applications, plan documents, corrections, and inspections. Permit fees and allowances appear in the proposal before construction begins.
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.
21634 Redwood Rd Unit F, Castro Valley, CA 94546
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