Location
Sl Window Inst. Corp
Sl Window Inst. Corp at 6741 W Byron St, Chicago, IL 60634, held a Window Contractor license (#NAT-F185252-1) with the Environmental Protection Agency contractors license board with an expiration date of 04-25-2023. We last verified the license was expired on 12-28-2025.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 65,686 Illinois contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
Sl Window Inst. Corp Contact Information
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Sl Window Inst. Corp License info
Inactive License
| License # | NAT-F185252-1 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Sl Window Inst. Corp at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
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- *No active license on file. If you are Sl Window Inst. Corp, click “This is My Business” to update your information.