Bayside Roofing vs Black Diamond Roofing
East Bay Roofing Comparison · Updated January 2026
| Bayside Roofing | Black Diamond Roofing | |
|---|---|---|
| Rating | ★ 1.0 | ★ 4.0 |
| Years Licensed | 16 years | 11 years |
| License # | 939666 | 996268 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Castro Valley, CA | Concord, CA |
| Website | baysideroofing.org | www.blackdiamondroofs.com |
Our Analysis
Black Diamond Roofing is based in Concord (Contra Costa County) and has been licensed for 11 years with an active license status. It also carries workers’ compensation coverage and lists a $25,000 bond. Customer feedback summaries describe professionalism, punctuality, and coordination that can support ongoing work for HOA communities, along with a willingness to help and problem-solving during service interactions. The feedback also notes that some jobs may require additional steps, such as returning with a separate proposal after an initial assessment, and that experiences are mixed, with some less positive outcomes mentioned alongside more favorable comments.
Why choose Bayside Roofing?
- ✓ You want a contractor based in Castro Valley serving Alameda County and nearby communities.
- ✓ You prefer a longer licensing history (16 years) while confirming the active license status fits your project timeline.
- ✓ You value documented workers’ compensation coverage and a $25,000 bond as part of contractor due diligence.
- ✓ You may want to clarify expectations for communication, follow-up, and leak-related callbacks based on the customer feedback summary.
Why choose Black Diamond Roofing?
- ✓ You want a contractor based in Concord in Contra Costa County and nearby areas.
- ✓ You’re looking for an active license with 11 years licensed, plus workers’ compensation coverage and a $25,000 bond.
- ✓ You may prioritize punctuality and coordination for ongoing or multi-party work (such as HOA-related projects), as reflected in customer feedback summaries.
- ✓ You may want to ask about the estimating process, since reviews mention cases where a separate proposal followed an initial assessment and experiences vary by job.
Get a Quote
What do you need help with?
When do you need this done?
Where should we send quotes?
Confirm Submission
By submitting, you agree to be contacted by a licensed contractor.
Frequently Asked Questions
Yes. Both Bayside Roofing and Black Diamond Roofing are listed with an active license status, indicating they are currently authorized to perform roofing work in California.
Both companies are described as carrying workers’ compensation coverage and being bonded with a $25,000 bond.
Bayside Roofing is based in Castro Valley (Alameda County) and is described as serving Alameda County and nearby communities. Black Diamond Roofing is based in Concord (Contra Costa County).
For Bayside Roofing, ask how follow-up and leak-related callbacks are handled and what communication channels and response times to expect. For Black Diamond Roofing, ask about the assessment-to-proposal process and what steps occur between an initial visit and a final written estimate.
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.