Public Records Check
- License Found As of Jun 19, 2026, the California state licensing board shows an active license for Cornell Roofing Co.: C39 - Roofing 486563. 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 The California Secretary of State listed Cornell Roofing Co. as Active when we last checked on Jun 19, 2026, registered since 1985. You can confirm it's still current with the California Secretary of State.
- Business Address Cornell Roofing Co.'s listed address at 3291 Monument Way, Concord, CA 94518 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 Cornell Roofing Co. holds these manufacturer certifications: Malarkey Certified Pro Contractor. 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 Cornell Roofing Co. (Google, Yelp, the Better Business Bureau), 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 5/5 public records for Cornell Roofing Co.. 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).(925) 682-3473
-
Primary Address
3291 Monument Way, Concord, CA 94518
-
Website
cornellroofingco.com
- Socials
Company Description
Cornell Roofing Co. has served the Concord, California area since 1955, operating as a family-owned residential and commercial roofing contractor. The company holds California license #486563 and is fully licensed and bonded. Services include roof installation, roof repair, gutter installation, and tar and gravel roofing systems. The business serves Alamo, Antioch, Bethel Island, Brentwood, Byron, Canyon, Clayton, Concord, Crockett, Danville, Diablo, El Cerrito, El Sobrante, Hercules, Knightsen, Lafayette, Martinez, Moraga, Oakley, Orinda, Pinole, Pittsburg, Pleasant Hill, Port Costa, Richmond, Rodeo, San Pablo, San Ramon, and Walnut Creek. The company answers its own phones with full-time office staff and provides free estimates.
Services Offered
- Roof InstallationSetting up a new roof system on a structure that lacks one, including decking preparation, underlayment, and shingles or other roofing material.
- Roof RepairFixing localized damage such as leaks, missing shingles, damaged flashing, or deteriorated sections without replacing the entire roof.
- Gutter InstallationSetting up gutters and downspouts to channel water away from the roof and foundation, preventing water damage and erosion.
- Tar And Gravel RoofingA built-up roofing system using alternating layers of tar and gravel aggregate, commonly applied to flat or low-slope commercial and residential roofs.
- Leak RepairLocating and sealing active leaks around flashing, vents, and worn areas to stop water intrusion into the building.
- Roof PatchingTemporary or permanent repair of small damaged areas using matching materials, typically for localized wear, holes, or deterioration.
Credentials
-
Malarkey Certified Pro Contractor
A Malarkey Certified Pro Contractor sits one level above the baseline Certified tier. To earn it, the contractor completes hands-on, in-person training with a Malarkey representative and passes a Pro-level certification… Read more
Company Info
- License Number
- 486563
- License Type
- Roofing
- Company Name
- CORNELL ROOFING COMPANY INC
- Entity Type
- Corporation
- License Issued
- Feb 4, 1986
- License Exp
- Feb 29, 2028
- License Classifications
- C39 - ROOFING
- Bond Amount
- $25,000
- Bond Number
- 100109947
- Workers Comp #
- BNET840159612
- Workers Comp Exp
- Jan 15, 2027
- State Entity ID
- 1276447
- Company Formation Date
- May 13, 1985
- Company Age
- 41.2 years old
- Company Formation State
- CA
- Principal Address
- 3291 MONUMENT WAY, CONCORD, CA 94518
- Mailing Address
- 3291 MONUMENT WAY, CONCORD, CA 94518
- Registered Agent
- CLINT KENNITH RICHARD WHITE
- Agent Address
- 3291 MONUMENT WAY, CONCORD, CA 94520
- Contractor ID
- 23724219
- Address Type
- Commercial
- Multi-State Company
- No
- Website Age
- 15.7 years old
Sample of Permits Pulled
| Date | Project | Location | Value | Status |
|---|---|---|---|---|
| Building - residential re-roof Tear off 1 30 year and re roof 1 30 year 1300sq ft tear off tar and gravel re roof tar and gravel 1800 sq ft *31 squares* *cool roof or coo… Permit #BIRR24-000456 | 1332 Sunset Loop, Lafayette, CA, 94549 | $21,600 | final | |
| Building permit application Roof permit: blue & gold fleet lp"; remove asphalt tile roof and replace in-kind. re-tar flat roof sections pier 41.5 Permit #B-2023-0097 | 41 Pier, San Francisco, CA, 94124 | $110,685 | withdrawn | |
| Building - residential re-roof Work for 1126 3rd ave only tear off 2 re roof 1200sq ft comparable and tar and gravel Permit #BIRR23-005818 | 1124 3rd Ave, Crockett, CA, 94525 | $9,800 | final | |
| Building - residential re-roof Tear off 1 re roof one comparable 30 year 26 sq **26 squares cool roof or cool roof exception at final**rgeorge Permit #BIRR23-003076 | 41 Temple Ct, Pacheco, CA, 94553 | $20,500 | final | |
| Building - residential re-roof Tear off 50 year and re roof torch down 43sq **- cool roof or coolroof exception is required at final. fabdul-rahman** Permit #BIRR23-001012 | 207 Rheem Blvd, Orinda, CA, 94563 | $27,200 | final |
Showing 5 recent permits from public records. This list is incomplete and may be out of date - verify any permit directly with the issuing city or county building department before relying on it. Did you spot any incorrect information here? Please let us know.
Inspections and Violations
U.S. and California OSHA data-
Apr 26, 2023 CONCORD, CA Insp #346661119
-
Dec 6, 2022 WALNUT CREEK, CA Insp #346377120
- Other Emergency medical services must be available 8 CCR §1512(b) $100
- Other Heat illness prevention - water, shade, rest 8 CCR §3395(h) $100
- Other Heat illness prevention - water, shade, rest 8 CCR §3395(i) $100
- Serious Injury and Illness Prevention Program required 8 CCR §1509(a) $10,800
- Other Emergency medical services must be available 8 CCR §1512(i) $200
Reviews and Reputation
-
Avg. Rating
-
BBB A+
-
Google
-
Yelp
Reviewers consistently praise Cornell Roofing for professional workmanship and quality results. Several customers report fast, efficient work completed without cutting corners, with crews described as synchronized, hardworking, and courteous. Multiple reviewers highlight thorough daily cleanup and attention to property protection during projects. Customers describe responsive communication and timely scheduling, with several noting competitive pricing. Reviewers appreciate the company's honesty - one customer reports being advised to delay replacement rather than pursue an immediate sale. Several reviewers mention the company's willingness to address follow-up questions and make adjustments to ensure satisfaction. One long-term customer reports using Cornell for over 20 years. Reviewers also note positive interactions with specific staff members and describe the company as trustworthy and family-oriented.
Review Signals Over Time
By sheer volume of Google reviews (a measure of how much feedback a firm has gathered) Cornell Roofing Co. ranks 2nd of the 9 roofers we track in Concord, ahead of about 88% of them. Over the past year it has not added any new Google reviews, the most recent being over a year ago. Its 4.6-star average rating sits below the Concord median of 5.0 stars. The owner responds to 55% of reviews, which is above the typical Concord roofer’s rate of 28%.
