Sierra Roofing and Solar vs Star Waterproofing and Roofing
East Bay Roofing Comparison · Updated January 2026
| Sierra Roofing and Solar | Star Waterproofing and Roofing | |
|---|---|---|
| Rating | ★ 4.8 | ★ 4.3 |
| Years Licensed | 22 years | 8 years |
| License # | 835854 | 1036279 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Dublin, CA | Walnut Creek, CA |
| Website | www.sierraroofing.com | www.starwaterproofingco.com |
Our Analysis
In customer feedback, Sierra is associated with roof inspections, leak diagnostics and repairs, full roof replacements, gutter installation and repair, and solar-related work. Reviews frequently describe detailed, on-site evaluations and estimates that explain findings and recommended next steps. Service experiences referenced include scheduled consultations and time-sensitive visits for active leaks during heavy rain, along with cleanup practices and ongoing communication during projects.
Star’s feedback emphasizes diagnosing leaks, explaining repair recommendations, and providing detailed estimates and clear communication. Projects mentioned include decks, balconies, and flat or low-slope roofs, including work for multi-unit and commercial buildings. Reviews also reference professionalism, timeliness, protection of surrounding areas during construction, and follow-up support. Unlike Sierra’s largely consistent themes, Star’s feedback includes some reports of dissatisfaction related to communication or service experiences.
Why choose Sierra Roofing and Solar?
- ✓ You want a contractor frequently mentioned for residential roofing work such as inspections, leak repairs, and full roof replacements.
- ✓ Gutters and solar-related work are part of the scope you’re looking for, based on customer-referenced project types.
- ✓ You value detailed on-site evaluations and estimates that include explanations of findings and recommended next steps.
- ✓ You prefer a company with a longer licensing history in the provided data (22 years) and local operations in Alameda County (Dublin).
Why choose Star Waterproofing and Roofing?
- ✓ Your project involves waterproofing-adjacent areas such as decks or balconies, or flat/low-slope roofing, which are commonly referenced in customer feedback.
- ✓ You need experience that customers associate with multi-unit or commercial building work.
- ✓ You want a contractor often described as responsive in scheduling and clear in explaining leak diagnoses and repair recommendations.
- ✓ You’re located closer to Walnut Creek or elsewhere in Contra Costa County and want a contractor based in that area.
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Frequently Asked Questions
Yes. The provided data lists both Sierra Roofing and Solar and Star Waterproofing and Roofing as having an active license status and workers’ compensation coverage.
Sierra Roofing and Solar. Customer feedback in the provided data references solar-related work as part of Sierra’s project range.
Star Waterproofing and Roofing. Reviews in the provided data commonly mention decks, balconies, and flat or low-slope roof projects for Star, including multi-unit and commercial buildings.
Both companies are listed as maintaining a $25,000 bond in the provided data.
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.