Bay Roofing Company vs Black Diamond Roofing
East Bay Roofing Comparison · Updated January 2026
| Bay Roofing Company | Black Diamond Roofing | |
|---|---|---|
| Rating | ★ 4.3 | ★ 4.0 |
| Years Licensed | 37 years | 11 years |
| License # | 560803 | 996268 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Alameda, CA | Concord, CA |
| Website | www.bayroofingalameda.com | www.blackdiamondroofs.com |
Our Analysis
Operationally, Bay Roofing Company is described as working directly with customers from estimating through installation and focusing on meeting agreed schedules and project expectations. Customer feedback commonly mentions straightforward estimates, competitive pricing, timely arrival, and efficient completion, with notes about an organized process from evaluation through completion. Feedback also indicates at least one negative interaction, suggesting experiences can vary.
Black Diamond Roofing’s feedback emphasizes professionalism, punctuality, and communication/coordination, including situations that support ongoing work for HOA communities. Reviews also note a problem-solving approach and willingness to help. Some customers mention that after an initial assessment, the company may return with a separate proposal, which can add an extra step before work proceeds. As with Bay Roofing Company, feedback reflects mixed experiences, including some less positive outcomes.
Why choose Bay Roofing Company?
- ✓ Alameda-based contractor, which may be convenient for projects in Alameda County and nearby communities.
- ✓ Longer operating history in licensing terms (37 years) with an active license status.
- ✓ Customer feedback often mentions straightforward estimates, pricing clarity, and efficient completion.
- ✓ Some variation in customer experience is noted, including at least one reported negative interaction, so discussing expectations and communication upfront may help.
Why choose Black Diamond Roofing?
- ✓ Concord-based contractor, which may be a practical option for Contra Costa County and surrounding areas.
- ✓ Active license status with 11 years licensed, plus workers’ compensation coverage and a $25,000 bond.
- ✓ Feedback commonly highlights professionalism, punctuality, and communication, including coordination that can suit HOA-related work.
- ✓ Some reviews suggest an additional step where a separate proposal may follow an initial assessment, which could affect timeline and planning.
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Frequently Asked Questions
Yes. Both list workers’ compensation coverage and a $25,000 bond, and both have active license status based on the provided data.
Bay Roofing Company has been licensed for 37 years, while Black Diamond Roofing has been licensed for 11 years.
Bay Roofing Company is located in Alameda, Alameda County, California. Black Diamond Roofing is located in Concord, Contra Costa County, California.
Bay Roofing Company is often described as having an organized process from evaluation through completion. Black Diamond Roofing reviews mention that after an initial assessment, the company may return with a separate proposal, adding an extra step before moving forward.
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.