Public Records Check
- License Found As of Jul 10, 2026, the California state licensing board shows an active license for Cornerstone Roofing: C39 - Roofing 909400. 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 Cornerstone Roofing'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.
- Business Address Cornerstone Roofing's listed address at 2100 Llano Rd #N1, Santa Rosa, CA 95407 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.
- 0 Credentials Our automated search didn't find a manufacturer certification for Cornerstone Roofing. 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 Cornerstone Roofing (Google, Yelp, 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 Cornerstone Roofing. The more of a company's record you can check, the more informed your hiring decision.
Contact Info
-
Phone
This is either a business landline or VoIP number (not a mobile number).(707) 546-3547
-
Primary Address
2100 Llano Rd #N1, Santa Rosa, CA 95407
-
Owner Email
-
Website
cornerstoneroofs.com
- Socials
Company Description
Cornerstone Roofing was founded in 2006 and operates as a second-generation, family-owned roofing contractor serving Sonoma County and the North Bay region. The company holds California contractor license CSLB #909400 and is fully licensed and bonded. Cornerstone installs, repairs, and replaces composite shingle, metal, tile, and low-slope roofing systems for residential and commercial properties. The company has completed over 2,500 roofs and maintains a 5.0 Google rating. Services include new roof installation, roof replacement, roof repair, roof maintenance, and inspections. Cornerstone serves Santa Rosa, Rohnert Park, Sebastopol, Bodega Bay, Petaluma, Healdsburg, and surrounding areas throughout Sonoma and Marin County.
Services Offered
- Composite Shingle RoofingInstallation of engineered shingles made from asphalt, fiberglass, or recycled materials as an alternative to wood or traditional asphalt.
- Metal Roofing InstallationInstalling metal panels or standing-seam roofing systems, offering longevity and weather resistance for residential or commercial properties.
- 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.
- Low Slope RoofingInstallation of roofing systems designed for roofs with minimal pitch, typically using membranes or specialized materials.
- Flat RoofingInstallation or repair of low-slope roofs using membranes, tar and gravel, or other systems designed to shed water on nearly level surfaces.
- Roof ReplacementRemoving an old or failing roof system and installing a new one, typically when repairs are no longer cost-effective.
- Roof RepairFixing localized damage such as leaks, missing shingles, damaged flashing, or deteriorated sections without replacing the entire roof.
- Roof MaintenanceRegular upkeep such as cleaning gutters, removing debris, checking seals, and minor repairs to extend roof life and prevent problems.
- Roof InspectionA professional examination of the roof's condition, identifying damage, wear, leaks, and remaining lifespan to guide maintenance or replacement decisions.
- New Roof InstallationInstalling a complete new roof system on a structure that currently lacks one or needs full replacement.
- Residential RoofingRoof work on single-family homes and small residential properties, adapted to typical house construction and materials.
- Commercial RoofingRoof installation, repair, and maintenance on office buildings, retail spaces, and other commercial structures, often involving flat or low-slope systems.
- Standing Seam MetalA metal roofing system with vertical seams that interlock, offering durability and a modern appearance for residential or commercial properties.
- Spanish Tile RoofClay or concrete barrel tiles installed in overlapping courses, common in Mediterranean and Southwestern architecture, offering durability and distinctive aesthetic appeal.
- TPO Low SlopeThermoplastic polyolefin membrane roofing for flat or gently sloped roofs, providing UV resistance and flexibility with heat-welded seams to prevent leaks.
Company Info
- License Number
- 909400
- Company Name
- CORNERSTONE ROOFING INC
- Entity Type
- Corporation
- License Issued
- Jan 18, 2008
- License Exp
- Jan 31, 2028
- License Classifications
- C39 - ROOFING
- Bond Amount
- $25,000
- Bond Number
- 10139709
- Workers Comp #
- WPL506976102
- Workers Comp Exp
- Feb 1, 2027
- Address Type
- Commercial
- Multi-State Company
- No
- Website Age
- 12.6 years old
Inspections and Violations
U.S. and California OSHA data-
Jul 25, 2025 NAPA, CA Insp #348398835
Reviews and Reputation
-
Avg. Rating
-
BBB A+
-
Google
-
Yelp
Reviewers consistently praise Cornerstone Roofing for professional workmanship, timely completion, and fair pricing. Several customers report the team was respectful of their property, maintained daily cleanups, and communicated transparently throughout projects. Reviewers describe the company as family-owned and note that owner Lucas and his crew were responsive and easy to work with. Some customers mention being impressed enough to recommend the company to other contractors. One reviewer noted the company was willing to evaluate roofs for free and offer repairs as an alternative to replacement. However, one reviewer expressed frustration that workers could not explain the work process when the owner was absent, citing language barriers as a communication obstacle. Another reviewer mentioned noting the absence of negative issues from older reviews, suggesting past concerns may have been resolved under current ownership.
Review Signals Over Time
By sheer volume of Google reviews (a measure of how much feedback a firm has gathered) Cornerstone Roofing ranks 3rd of the 8 roofers we track in Santa Rosa, ahead of about 71% of them. Over the past year it has pulled in 19 reviews - the most recent last month - for a rate of roughly 1.1 reviews per month, which is faster than approximately 50% of the other Santa Rosa roofers. Its 5.0-star average rating sits right at the Santa Rosa median of 5.0 stars. The owner responds to 100% of reviews, which is above the typical Santa Rosa roofer’s rate of 82%.
