Calisco Roofing vs Alpha Roofing
East Bay Roofing Comparison · Updated January 2026
| Calisco Roofing | Alpha Roofing | |
|---|---|---|
| Rating | ★ 5.0 | ★ 5.0 |
| Years Licensed | 3 years | 1 years |
| License # | 1105093 | 1129832 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Brentwood, CA | Oakland, CA |
| Website | caliscoroofing.com | alpharoofing.com |
Our Analysis
On service scope, Calisco Roofing is specifically described as providing residential roofing services including inspections, leak repairs, maintenance, and roof replacement. Customer-referenced project examples for Calisco include low-slope roofing, tile roof maintenance and repairs, PVC membrane roofing, torch-down roofing, gutter cleaning, and roof vent/flashing installation. For Alpha Roofing, the provided information emphasizes professional, organized handling of roofing projects, with mentions of communication, scheduling, workmanship details, cleanup, and responsiveness for leak concerns; however, specific roofing systems or project types are not listed in the provided data.
Geographically, Calisco’s stated service area is the surrounding area within Contra Costa County, while Alpha’s location is Oakland; no explicit service area is provided for Alpha. Both are described as communicating clearly from estimate through completion and leaving the work area clean after the job.
Why choose Calisco Roofing?
- ✓ You want a contractor based in Brentwood and serving the surrounding area within Contra Costa County.
- ✓ You prefer a company with 3 years of active licensure, plus workers’ comp coverage and a $25,000 bond.
- ✓ Your project involves a specific system or task referenced in the data (e.g., low-slope work, tile maintenance/repairs, PVC membrane, torch-down, gutters, or vent/flashing installation).
- ✓ You expect on-roof inspection and documentation such as before-and-after photos, along with clear explanations of options and scope.
Why choose Alpha Roofing?
- ✓ You want a contractor based in Oakland (Alameda County) with an active license.
- ✓ You are looking for a company described as organized, with punctual crews and efficient scheduling from estimate through completion.
- ✓ You value regular updates during the job, clear explanations of the work, and a straightforward process.
- ✓ You may need responsiveness for leak concerns and timely site visits, along with attention to finishing details and cleanup.
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Frequently Asked Questions
Yes. Both Calisco Roofing and Alpha Roofing are listed as carrying workers’ compensation coverage and maintaining a $25,000 bond.
Calisco Roofing is based in Brentwood in Contra Costa County, California. Alpha Roofing is based in Oakland in Alameda County, California.
Calisco Roofing has been licensed for 3 years and Alpha Roofing has been licensed for 1 year. Both are listed with active license status.
The data mentions residential inspections, leak repairs, maintenance, and roof replacement, with examples including low-slope roofing, tile roof maintenance and repairs, PVC membrane roofing, torch-down roofing, gutter cleaning, and roof vent/flashing installation.
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.