Public Records Check
- License Found As of Jul 11, 2026, the California state licensing board shows an active license for Alta-Cal Roofing: C39 - Roofing 894249. 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.
- Missing Corporation Our automated search didn't find a registered business entity for Alta-Cal Roofing with the California Secretary of State. That doesn't mean the company isn't legitimate. Many roofers operate legally as sole proprietorships, which don't require registration, and a registered business can be filed under a different name, formed in another state, or created too recently for us to match. To confirm how the business is structured, ask the contractor or search the California Secretary of State directly.
- Business Address Alta-Cal Roofing's listed address at 2300 technology pkwy #8, Hollister, CA 95023 appears to be a business 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.
- 1 Credential Alta-Cal Roofing holds these manufacturer certifications: Owens Corning Preferred. These show the company met a manufacturer's program requirements and may offer manufacturer-backed warranties, but they aren't independent quality audits. You can confirm current status with the manufacturer.
- Excellent Ratings Across the platforms we identified for Alta-Cal Roofing (Google, Yelp, Owens Corning), the blended average is 4.8 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 Alta-Cal Roofing. The more of a company's record you can check, the more informed your hiring decision.
Contact Info
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Phone
This phone number belongs to an Android phone that supports RCS, so both calling and texting is supported.(831) 600-6768
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Primary Address
2300 technology pkwy #8, Hollister, CA 95023
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Owner Email
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Website
altacalroofing.com
- Socials
Company Description
Alta-Cal Roofing was founded in the early 1980s and holds California State License Board number 894249. The company provides residential and commercial roofing services in the Hollister area, including roof repair, roof replacement, and skylight installation. Residential services cover asphalt/composition, metal, and wood shake roofing. Commercial services include spray silicone, spray acrylic, flat, warehouse, and pitched roofing systems, as well as tile roofing. The company also installs walking decks and offers roof maintenance. Alta-Cal Roofing is fully insured and bonded, operating as a family-owned business run by a father and son.
Services Offered
- Residential Roof ReplacementRemoving and replacing an entire residential roof system with new materials.
- Residential Roof RepairFixing leaks, damaged shingles, flashing, and other issues on residential roofs.
- Commercial Roof ReplacementFull removal and installation of new roofing systems on commercial properties, often involving large flat or low-slope areas.
- Commercial Roof RepairRepairing leaks, membrane damage, and other issues on commercial roofs.
- 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.
- Wood Shake RoofingInstallation of split wood shingles or shakes for a rustic, high-end residential roof with natural appearance and excellent insulation.
- Spray Silicone RoofingA liquid silicone coating sprayed over flat or low-slope roofs to create a seamless, waterproof membrane that reflects UV rays and extends roof life.
- Spray Acrylic RoofingA water-based acrylic coating applied by spray to flat roofs, forming a protective layer that resists weathering and can be recoated to restore protection.
- Flat RoofingInstallation or repair of low-slope roofs using membranes, tar and gravel, or other systems designed to shed water on nearly level surfaces.
- Warehouse RoofingInstallation, repair, and maintenance of large flat or low-slope roofs on industrial and storage buildings, typically using commercial-grade materials like TPO, EPDM, or metal.
- 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.
- Skylight InstallationCutting and framing an opening in the roof and installing a window unit to bring natural light into interior spaces.
- Walking DecksProtective surfaces or pathways installed on roofs to allow safe foot traffic over membrane areas without causing punctures or damage to the roofing system.
- Roof MaintenanceRegular upkeep such as cleaning gutters, removing debris, checking seals, and minor repairs to extend roof life and prevent problems.
- Pitched RoofingInstallation or repair of sloped roofs designed to shed water and snow, the most common residential roofing type.
Credentials
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Owens Corning Preferred
An Owens Corning Preferred contractor has earned the mid-tier designation in Owens Corning's contractor network by demonstrating installation quality, business stability, and customer satisfaction. This status… Read more
Company Info
- License Number
- 894249
- Issuing Authority
- CA CSLB
- License Type
- C39 - Roofing
- Company Name
- ALTA-CAL ROOFING
- Entity Type
- Sole Ownership
- License Issued
- Apr 11, 2007
- License Exp
- Apr 30, 2027
- License Classifications
- C39 - ROOFING
- Bond Amount
- $25,000
- Bond Number
- PB10163406861
- Workers Comp #
- WSD508734100
- Workers Comp Exp
- Dec 6, 2026
- Address Type
- Commercial
- Multi-State Company
- No
- Website Age
- 2.8 years old
Inspections and Violations
U.S. and California OSHA dataReviews and Reputation
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Avg. Rating
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Google
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Yelp
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Owens Corning
Reviewers consistently praise Alta-Cal Roofing for responsive and professional service. Several customers report receiving quotes quickly and having work completed promptly, often the next day or as scheduled. Reviewers describe the crew as efficient, pleasant, and thorough in cleanup. Multiple customers note competitive pricing and mention negotiating favorable rates. Reviewers highlight specific staff members - particularly John - for responsiveness, clear communication, and addressing concerns. Several customers report satisfaction with the quality of roof repairs and installations, with some noting they felt confident protecting their home investment. Reviewers appreciate extra touches, such as providing photos of completed work, offering solutions like bird deterrents, and following up on concerns. One reviewer mentions the company was the only one able to source a specific shingle color. Overall, customers express high satisfaction and recommend the business.
Review Signals Over Time
By sheer volume of Google reviews (a measure of how much feedback a firm has gathered) Alta-Cal Roofing ranks 230th of the 617 roofers we track across California, ahead of about 62% of them. Over the past year it has pulled in 23 reviews - the most recent this month - for a rate of roughly 1.7 reviews per month, which is faster than approximately 59% of the other California roofers. Its 4.8-star average rating sits just below the California median of 4.9 stars. The owner responds to 83% of reviews, which is above the typical California roofer’s rate of 47%.
