Ill. Admin. Code tit. 23, § 180.230
a) General Certificate of Occupancy
When the work covered by a building permit is complete or a facility complies with the requirements of this Part, and upon presentation of accurate safety reference plans for the facility certified by an architect or engineer to be in compliance with this Part (see Section 180.120), the regional superintendent shall issue a general certificate of occupancy. The general certificate of occupancy shall state the specific facility for which a design professional has certified compliance with this Part.
b) Certificate of Partial Occupancy
When requested to do so, a regional superintendent shall issue a certificate of partial occupancy before completion of the entire work covered by a permit, provided that the regional superintendent's inspection indicates that some areas can be occupied safely prior to full completion. The certificate of partial occupancy shall state the exact portions of the facility for which a design professional has certified compliance with this Part.
c) Certificate of Occupancy for a Temporary Facility
4) If the facility is a premanufactured unit, such as a mobile home, trailer unit, or other, similar structure, the application shall include evidence that all of the following conditions exist:
When requested to do so, a regional superintendent shall issue a one-year certificate of occupancy for a temporary facility, allowing use of a facility that does not comply with all the requirements of this Part, provided that all the following requirements are met.
d) Certificate of Occupancy for a Mobile Facility
When requested to do so, a regional superintendent shall issue a certificate of occupancy for a mobile facility, provided that the facility meets the requirements of Section 180.80(a) and (b).
A certificate of occupancy shall be obtained prior to any occupancy of a facility, including a mobile facility.
(Source: Amended at 49 Ill. Reg. 1774, effective January 30, 2025)