Method.
Municipal Code of Chicago § 14X-12-1205.4.2
in effect14X-12-1205.4.2 Method.
Exterior doors and windows and other openings in the exterior wall must be secured so that all openings are closed using one of the following methods:
1. Locked doors.
2. Locked windows without broken or cracked panes.
3. Commercial-quality metal security panels.
4. Filled with like-kind material as the surrounding wall.
5. Polycarbonate panels.
6. Plywood installed and secured in a manner approved by the building official.
Exception: If during the registration period and following the initial boarding and securing of the structure in compliance with Section 14X-12-1205.4 the building official notifies the mortgagee in writing that the structure was found open or it has been judicially or administratively found to be open, in each case on two separate occasions at least 30 days apart, then the structure must thereafter be secured only with commercial-quality metal security panels or a method deemed equivalent by the building official.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2676577Fetched: 10/24/2026