Mortensen Roofing & Gutters vs Sierra Roofing and Solar
East Bay Roofing Comparison · Updated January 2026
| Mortensen Roofing & Gutters | Sierra Roofing and Solar | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.8 |
| Years Licensed | 36 years | 22 years |
| License # | 583533 | 835854 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Concord, CA | Dublin, CA |
| Website | www.mortensenroofing.com | www.sierraroofing.com |
Our Analysis
Sierra Roofing and Solar is based in Dublin (Alameda County) and shows 22 years of licensing history with an active license. It also reports workers’ compensation coverage and a $25,000 bond. Customer feedback frequently highlights thorough inspections, clear explanations of findings, and detailed quotes that outline scope. Reviews also mention workmanship on roof replacements, repairs, and gutter projects, attention to cleanup, and consistent communication during consultations and follow-up visits. Some customers note scheduling may require planning ahead. Based on the provided information, Sierra’s feedback includes solar-related services, while Mortensen’s description centers on roofing and gutters for residential properties.
Why choose Mortensen Roofing & Gutters?
- ✓ You want a contractor located in Concord/Contra Costa County, which may be convenient for local scheduling and service.
- ✓ Licensing history is listed as 36 years, which may matter if you prioritize longer tenure.
- ✓ The provided scope emphasizes residential roofing and gutter work, including repairs, maintenance, and replacement.
- ✓ Customer feedback highlights straightforward estimating, timely follow-through, and assistance with targeted issues like leaks and sourcing replacement materials after damage.
Why choose Sierra Roofing and Solar?
- ✓ You want a contractor located in Dublin/Alameda County, which may be a better geographic fit depending on where you live.
- ✓ Licensing history is listed as 22 years, with an active license, workers’ compensation, and a $25,000 bond.
- ✓ Customer feedback often mentions thorough inspections, clear explanations, and detailed quotes that define the scope of work.
- ✓ Reviews also reference roof replacements, repairs, gutter projects, cleanup, and ongoing communication; some note scheduling may require planning ahead.
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Frequently Asked Questions
Yes. The provided data lists both companies as having an active license, workers’ compensation coverage, and a $25,000 bond.
Mortensen Roofing & Gutters is based in Concord in Contra Costa County, CA. Sierra Roofing and Solar is based in Dublin in Alameda County, CA.
Mortensen Roofing & Gutters is listed with 36 years licensed, while Sierra Roofing and Solar is listed with 22 years licensed.
Yes. Sierra Roofing and Solar’s provided information references solar-related services, while Mortensen Roofing & Gutters’ description focuses on roofing and gutter work for residential properties.
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.