Underground work.
Municipal Code of Chicago § 14A-4-401.3.2
in effect14A-4-401.3.2 Underground work.
Where construction documents indicate work extending more than 12 feet (3658 mm) below the lowest adjoining public way, the construction documents must be submitted to the Office of Underground Coordination, and its approval secured, before a permit may be issued 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/0-0-0-2660927Fetched: 10/24/2026
