Bay 101 Roofing vs Diamond Ridge Roofing Systems
South Bay Roofing Comparison · Updated January 2026
| Bay 101 Roofing | Diamond Ridge Roofing Systems | |
|---|---|---|
| Rating | ★ 4.6 | ★ 4.8 |
| Years Licensed | 18 years | 2 years |
| License # | 907116 | 1109532 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Alviso, CA | San Jose, CA |
| Website | www.bay101roofing.com | www.diamondridgeroofingsystems.com |
Our Analysis
In customer feedback, both are associated with roof replacement work and roof installation projects, and both are also mentioned in connection with gutter-related work. Bay 101 Roofing feedback additionally references add-ons such as sun tunnels and mentions responsiveness during bad weather and attention to details like flashing. Customers commonly describe Bay 101 Roofing’s process as organized, with communication about scope, timelines, and potential costs, though some feedback mentions dissatisfaction with follow-up and longer-term outcomes.
Diamond Ridge Roofing Systems feedback emphasizes responsiveness, efficiency, and clear explanations with regular updates. Reviews also mention repairs, timely completion, and coordination with third parties such as solar providers. Some customers describe pricing as reasonable, while a smaller number mention concerns about reliability and jobsite cleanliness.
Why choose Bay 101 Roofing?
- ✓ You want a contractor with a longer documented licensing history (18 years) and an active license in Santa Clara County.
- ✓ Your project may include roof replacement or new installation plus related add-ons mentioned by customers, such as gutters or sun tunnels.
- ✓ You value communication about scope, timelines, and potential costs, and an organized process from assessment through completion.
- ✓ You want a company that some customers say was responsive during bad weather and attentive to details like flashing, while noting that some experiences mention follow-up or longer-term outcome concerns.
Why choose Diamond Ridge Roofing Systems?
- ✓ You prefer a San Jose-based contractor with an active license and a shorter licensing history (2 years) in the provided data.
- ✓ Your project includes roof replacement or repairs, and may involve gutters or coordination with third parties such as solar providers.
- ✓ You want frequent updates and detailed explanations during the project, as commonly described in customer feedback.
- ✓ You are weighing reports of professional, efficient work against a smaller number of comments raising concerns about reliability and jobsite cleanliness.
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Frequently Asked Questions
Yes. The provided data states both Bay 101 Roofing and Diamond Ridge Roofing Systems carry workers’ compensation coverage and each maintains a $25,000 bond.
Bay 101 Roofing is based in Alviso in Santa Clara County, California. Diamond Ridge Roofing Systems is based in San Jose in Santa Clara County, California.
For Bay 101 Roofing, customer feedback references roof replacements, new roof installations, and related improvements such as gutters and sun tunnels. For Diamond Ridge Roofing Systems, feedback references roof replacements and repairs, gutter-related work, and coordination with third parties such as solar providers.
Bay 101 Roofing is listed as licensed for 18 years. Diamond Ridge Roofing Systems is listed as licensed for 2 years. Both are shown with active license status.
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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.