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Hamilton Exteriors — roofing, siding, and exterior remodeling in Union City, CA
4.6 stars from 47 Google reviews

Home Remodeling Contractor in Union City

Licensed California general contractor
Project scope reviewed before construction
Permits and inspections coordinated
CSLB #1078806

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Factory-certified by our manufacturer partners

GAF Master Elite Contractor
James Hardie siding
Top Rated Local Top 10 business badge
Anlin Windows and Doors
Tesla Powerwall Certified Installer
What We Build

Available Services in Union City

ADUs services by Hamilton Exteriors in Union City

ADUs

Property feasibility, design, permits, utilities, and construction planning for accessory dwelling units and garage conversions.

500+

Projects Completed

10+

Years Experience

50yr

Warranty Coverage

4.8

Average Rating

Google rating 4.6 ★ from 47 public reviews

What Homeowners Say About Our Work

Public reviews from Northern California homeowners.

Chandra Williams, Hamilton Exteriors customer

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 🌟 ✨ 💫🌟✨💫🌟✨💫☀️🙌🏾😀👍🏾

E

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!

R

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.

L

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.

Project Management

How Hamilton Exteriors
Manages the Work

Itemized Scope

Your proposal identifies included work, selected materials, permit allowances, payment timing, and exclusions before construction.

Relevant Credentials

Hamilton Exteriors holds CSLB #1078806. We show manufacturer credentials only where they apply to the selected system.

Warranty Review

We explain the product and workmanship warranty terms that apply to your selected scope before work begins.

One Project Contact

One contact coordinates the schedule, field questions, inspections, and project closeout.

Serving Union City's Best Neighborhoods

Hamilton Exteriors has completed projects across Union City — from Decoto to Eastshore. Here are some of the communities we serve.

Hillview

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.

Frequently Asked Questions

Didn't find the answer to your question? Call Now (650) 977-3351

What areas do you serve?

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.

How does billing and financing work?

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.

Are you licensed and insured?

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.

Do I need a permit for my exterior project?

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.

How much does a home renovation cost in Union City?

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.

Why do Union City homeowners choose Hamilton Exteriors?

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.

What neighborhoods in Union City does Hamilton Exteriors serve?

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.

What exterior problems are most common in Union City?

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.

Does a new roof or siding increase home value in Union City?

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.

Ready to start? (650) 977-3351

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21634 Redwood Rd Unit F, Castro Valley, CA 94546

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Hamilton Exteriors — Serving Union City, CA