Black Diamond Roofing vs Mortensen Roofing & Gutters
East Bay Roofing Comparison · Updated January 2026
| Black Diamond Roofing | Mortensen Roofing & Gutters | |
|---|---|---|
| Rating | ★ 4.0 | ★ 5.0 |
| Years Licensed | 11 years | 36 years |
| License # | 996268 | 583533 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Concord, CA | Concord, CA |
| Website | www.blackdiamondroofs.com | www.mortensenroofing.com |
Our Analysis
Mortensen Roofing & Gutters is also listed in Concord/Contra Costa County and has an active license. It carries workers’ compensation coverage and maintains a $25,000 bond. It has been licensed for 36 years, indicating a longer documented licensing history than Company A. Customer descriptions commonly highlight a straightforward process from estimating through completion, clear communication, dependable scheduling, and workmanship that meets expectations. Reviews also mention help with specific repair needs such as addressing leaks and assisting with sourcing replacement materials after damage, covering both larger projects and smaller fixes.
Why choose Black Diamond Roofing?
- ✓ You want a Concord-based contractor with an active license, workers’ comp coverage, and a $25,000 bond.
- ✓ Your project involves HOA coordination or community-managed properties, where communication and scheduling can matter.
- ✓ You value punctuality and a problem-solving approach during service interactions.
- ✓ You’re comfortable with a process that may include follow-up steps (such as receiving a separate proposal after an initial assessment).
Why choose Mortensen Roofing & Gutters?
- ✓ You want a contractor with a longer licensing history (36 years) while still maintaining active status, workers’ comp, and a $25,000 bond.
- ✓ You prefer a straightforward workflow from estimate to completion, with emphasis on clear communication and dependable scheduling.
- ✓ Your needs may include targeted repairs (such as leak work) as well as larger roofing projects.
- ✓ You may benefit from help sourcing replacement materials after damage, as referenced in customer experiences.
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Frequently Asked Questions
Yes. Both are listed with an active license status and both carry workers’ compensation coverage.
Yes. Each company is listed as maintaining a $25,000 bond.
Mortensen Roofing & Gutters is listed as licensed for 36 years, while Black Diamond Roofing is listed as licensed for 11 years.
Black Diamond Roofing is described as coordinating projects through homeowner associations. The provided information for Mortensen Roofing & Gutters does not specifically mention HOA coordination.
Other East Bay Roofing Comparisons
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified January 13, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.