Public Records Check
- License Found As of Jul 12, 2026, the California state licensing board shows an active license for Hamilton Exteriors: B - General Building 1078806. An active license means the state currently authorizes this contractor to do this work. It doesn't speak to the quality of their work or their current insurance. License status can change, so you can confirm it's still active anytime with the California state licensing board.
- Registered Corporation Hamilton Exteriors's registered name carries a corporate suffix (LLC or Inc), but we have not matched it to a filing on the California Secretary of State. You can confirm how the business is registered, and its current status, directly with the California Secretary of State.
- Residential Address Hamilton Exteriors's listed address at 21634 Redwood Rd Unit F, Castro Valley, CA 94546 appears to be a residential address. This means the company operates from a real, locatable address rather than a mailbox or PO box, which can make it easier to reach them or resolve issues. Many roofers legitimately work from a home address, so this doesn't speak to the quality of their work, license, or insurance.
- 0 Credentials Our automated search didn't find a manufacturer certification for Hamilton Exteriors. Many reputable roofers aren't certified by any manufacturer, often by choice, so this isn't a sign of a problem. If a manufacturer-backed warranty matters to you, ask the contractor which certifications they carry.
- Excellent Ratings Across the platforms we identified for Hamilton Exteriors (Google, the Better Business Bureau), the blended average is 4.5 out of 5, which we label Excellent. This is a plain average of public customer ratings, not a RooferWatch score. A high average reflects past customers' experiences, not a guarantee of yours, so read the underlying reviews and weigh them yourself.
We verified 4/5 public records for Hamilton Exteriors. The more of a company's record you can check, the more informed your hiring decision.
Contact Info
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Phone
This is either a business landline or VoIP number (not a mobile number).(650) 977-3351
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Primary Address
21634 Redwood Rd Unit F, Castro Valley, CA 94546
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Owner Email
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Website
hamilton-exteriors.com
- Socials
Company Description
Hamilton Exteriors, a California general contractor licensed since 2018 (CSLB #1078806), serves Northern California across the San Francisco Bay Area, Greater Sacramento, and the Central Valley. The company offers roofing with asphalt shingles, metal, and tile; siding including James Hardie fiber cement and stucco; window replacements; waterproofing; ADU construction including detached units and garage conversions; custom home ground-up construction; and additions and remodels. Hamilton Exteriors holds GAF Master Elite, Owens Corning Preferred, CertainTeed ShingleMaster, and James Hardie Elite Preferred certifications. The company provides a 50-year transferable warranty on roofing and siding installations backed by manufacturer warranties and workmanship guarantees. An in-house licensed architect leads design and construction. Financing options include zero-down with approved credit, 12-month same-as-cash plans, and extended terms up to 15 years.
Services Offered
- Asphalt Shingle RoofingInstallation of asphalt-based shingles, the most common residential roofing material, available in various colors and styles.
- Metal RoofingInstallation of durable metal panels or standing seam roofing, which resists weather, lasts 40-70 years, and works well in snowy or coastal areas.
- Tile RoofingInstallation or repair of clay or concrete tile roofing, which offers longevity, fire resistance, and a distinctive aesthetic for Mediterranean or Spanish-style homes.
- Full Roof ReplacementRemoving old roofing materials and installing a complete new roof system, including decking repairs if needed.
- Roof RepairFixing localized damage such as leaks, missing shingles, damaged flashing, or deteriorated sections without replacing the entire roof.
- Fiber Cement SidingDurable siding boards made from cement and wood fibers that resist rot, insects, and fire while mimicking the look of wood or masonry.
- Vinyl SidingInstallation of PVC plastic siding panels that provide low-maintenance exterior cladding in various colors and styles.
- Siding ReplacementRemoval and installation of new exterior wall cladding, typically vinyl, fiber cement, or metal, to restore weather protection and appearance.
- Window ReplacementRemoving old windows and installing new ones to improve energy efficiency, security, and appearance.
- Double-Hung WindowsVertical-sliding windows with two sashes that move up and down independently, allowing flexible ventilation from top or bottom.
- Casement WindowsInstallation of hinged windows that swing outward, offering good ventilation and a traditional appearance.
- Sliding WindowsHorizontal-gliding windows where one or both sashes slide side-to-side, offering easy operation and a clean modern look.
- WaterproofingApplying protective coatings or membranes to basements, foundations, and exterior surfaces to block water penetration.
- Stucco SidingA cement-based exterior coating applied over mesh and base layers to create a durable, weather-resistant finish for walls. Common in southwestern and Mediterranean-style homes.
- Dry Rot RepairTreatment and replacement of wood framing or decking affected by fungal decay and moisture damage.
- Glass DoorsExterior glass entry and patio doors that provide natural light and weather protection, commonly installed during home renovations or replacements.
- Detached ADU ConstructionBuilding a separate residential unit on the property, such as a guest house or rental apartment, that operates independently from the main home.
- Garage Conversion ADUConverting an existing garage into a self-contained living space with bedroom, bathroom, and kitchen to create an accessory dwelling unit.
- Custom Home ConstructionBuilding a new residential home from the ground up tailored to the owner's specifications, design preferences, and site conditions.
- Room AdditionsConstruction of new rooms or enclosed spaces that expand a home's square footage and living area.
Company Info
- License Number
- 1078806
- Company Name
- ABR QUALITY RESOURCES INC
- Entity Type
- Corporation
- License Issued
- Jul 26, 2021
- License Exp
- Jul 31, 2027
- License Classifications
- B - GENERAL BUILDING
- Bond Amount
- $25,000
- Bond Number
- 101017707
- Workers Comp #
- WCF35750001
- Workers Comp Exp
- Jun 30, 2027
- Address Type
- Residential
- Multi-State Company
- No
- Website Age
- 1.5 years old
Inspections and Violations
U.S. and California OSHA dataReviews and Reputation
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Avg. Rating
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BBB A-
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Google
Customer reviews of Hamilton Exteriors present sharply divided experiences. Several reviewers report positive interactions, praising responsive staff members like Alex, Rachel, and Dakota, along with smooth project coordination, attention to detail, and quality workmanship on kitchen renovations, bathroom projects, and other installations. These customers describe feeling well-informed throughout their projects and satisfied with final results. However, other reviewers describe significant problems. One customer reports the company withdrew funds exceeding California legal deposit limits before contract execution, declined to amend the contract as promised, and pressured for additional funds, requiring external escalation to recover money. Another reviewer describes a renovation marked by delays, poor coordination, high employee turnover, and quality issues, including a shower floor installed without proper drainage slope. This customer also reports having to advance funds directly to an employee and hire another contractor to complete work.
Review Signals Over Time
By sheer volume of Google reviews (a measure of how much feedback a firm has gathered) Hamilton Exteriors ranks 258th of the 617 roofers we track across California, ahead of about 57% of them. Over the past year it has pulled in 30 reviews - the most recent this month - for a rate of roughly 8.1 reviews per month, which is faster than approximately 92% of the other California roofers. Its 4.6-star average rating sits below the California median of 4.9 stars. The owner responds to 0% of reviews, which is below the typical California roofer’s rate of 47%.
