Sierra Roofing and Solar vs Alpha Roofing
East Bay Roofing Comparison · Updated January 2026
| Sierra Roofing and Solar | Alpha Roofing | |
|---|---|---|
| Rating | ★ 4.8 | ★ 5.0 |
| Years Licensed | 22 years | 1 years |
| License # | 835854 | 1129832 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Dublin, CA | Oakland, CA |
| Website | www.sierraroofing.com | alpharoofing.com |
Our Analysis
Alpha Roofing is based in Oakland and is listed as licensed for 1 year with an active license, workers’ compensation coverage, and a $25,000 bond. Customer feedback emphasizes an organized process, clear communication from the initial call and estimate through completion, and regular updates during the job. Reviews commonly mention punctual crews, efficient scheduling, and attention to workmanship and finishing details, plus cleanup at the end of the project. Some experiences also reference responsiveness to leak concerns and timely site visits. Based on the provided data, Sierra Roofing and Solar is more frequently associated with gutters and solar-related work, while Alpha Roofing’s summary centers more on roofing project coordination and execution.
Why choose Sierra Roofing and Solar?
- ✓ You want a contractor described as handling roofing plus related exterior/energy work, including gutters and solar-related projects.
- ✓ You value detailed inspections and estimates that include explanations of findings and recommended next steps.
- ✓ You prefer a company with a longer listed licensing history (22 years) while still maintaining active status, workers’ comp, and a $25,000 bond.
- ✓ You may need help with leak diagnostics and repairs, including time-sensitive visits during heavy rain, as referenced in customer experiences.
Why choose Alpha Roofing?
- ✓ You want a contractor in Oakland with an active license, workers’ comp coverage, and a $25,000 bond.
- ✓ You prioritize organized project flow, including clear communication from the first call through completion and regular job updates.
- ✓ You care about punctual crews, efficient scheduling, and attention to finishing details, which are recurring themes in customer feedback.
- ✓ You want a company described as responsive to leak concerns with timely site visits, based on referenced experiences.
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Frequently Asked Questions
Yes. Both are listed with an active license status, workers’ compensation coverage, and a $25,000 bond.
Sierra Roofing and Solar is listed as licensed for 22 years, while Alpha Roofing is listed as licensed for 1 year.
Customer feedback for both references responsiveness to leak concerns. Sierra Roofing and Solar also has examples of time-sensitive visits during heavy rain.
Sierra Roofing and Solar is described as handling gutter installation and repair and solar-related work in addition to roofing.
Other East Bay Roofing Comparisons
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified January 15, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.