Thor Contracting Corporation vs Williams Roofing
East Bay Roofing Comparison · Updated January 2026
| Thor Contracting Corporation | Williams Roofing | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.6 |
| Years Licensed | 4 years | 32 years |
| License # | 1093228 | 687391 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | El Sobrante, CA | Fremont, CA |
| Website | thorcontractingcorporation.com | williamsroofing.net |
Our Analysis
In customer feedback, Thor Contracting Corporation is commonly associated with roof repairs, roof installation, and maintenance, and reviews also mention coordinating around inspections and permits. Comments also reference organized jobsite practices and completing work within customer timelines, including fast turnaround when scheduling allows. Additionally, feedback suggests Thor may take projects beyond its immediate area when arranged.
Williams Roofing is frequently referenced for roof repairs and full roof replacements, including leak-related work. Reviews emphasize clear communication, timely scheduling, and completing projects as promised. Customer comments also note a straightforward approach to recommendations, including not pushing unnecessary work and describing pricing as fair. Overall, both appear to focus on residential roofing services with process-oriented communication and scheduling mentioned as recurring themes.
Why choose Thor Contracting Corporation?
- ✓ You want a Contra Costa County-based contractor (El Sobrante) and may prefer a local option for nearby projects.
- ✓ Your project may involve coordination with inspections and permits, which is specifically referenced in customer feedback.
- ✓ You’re looking for roofing services that include repairs, installation, and maintenance, with comments noting organized jobsite practices.
- ✓ You may need scheduling flexibility or a faster turnaround, as reviews mention efficient scheduling and completing work within short windows when possible.
Why choose Williams Roofing?
- ✓ You prefer a contractor with a longer licensing history; Williams Roofing lists 32 years licensed with an active status.
- ✓ Your scope is a roof repair or full roof replacement, including addressing leaks, which is commonly mentioned in customer feedback.
- ✓ You value a straightforward quoting and recommendation process; reviews note the company does not push unnecessary work.
- ✓ You’re located in or near Fremont/Alameda County and want a contractor based in that area for logistics and scheduling.
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Frequently Asked Questions
Yes. Both Thor Contracting Corporation and Williams Roofing list workers’ compensation coverage and a $25,000 bond.
Thor Contracting Corporation is based in El Sobrante in Contra Costa County, California. Williams Roofing is based in Fremont in Alameda County, California.
Thor Contracting Corporation is mentioned for roof repairs, roof installation, and maintenance, with references to coordinating inspections and permits. Williams Roofing is mentioned for roof repairs and full roof replacements, including leak-related work.
Thor Contracting Corporation lists 4 years licensed with an active status. Williams Roofing lists 32 years licensed with an active status.
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.