What building code does Chicago, IL use?

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Accepted Answer

Chicago, IL currently enforces the 2019 Chicago Building Code, Title 14B (Chicago amendments to the 2018 IBC). Chicago adopts its own code editions. Chicago maintains its own home-rule Chicago Construction Codes (Titles 14A-14X) under a phased modernization: the building, rehabilitation, and energy titles are modern I-Code-based (2018 IBC/IEBC, 2021 IECC) while fire prevention, plumbing, mechanical, and fuel gas remain interim legacy codes, and the electrical code is still based on the 2017 NEC with no 2021-IBC or 2023-NEC update in force as of July 2026; Chicago has no IRC-based residential code (residential work falls under Title 14B).

Scope	Code	Edition
Building	Chicago Building Code, Title 14B (Chicago amendments to the 2018 IBC) (with local amendments)	2019
Fire	Interim Chicago Fire Prevention Code, Title 14F (not model-code based; carries forward legacy Municipal Code Title 15 provisions pending modernization) (with local amendments)	2019 interim
Mechanical	Interim Chicago Mechanical Code, Title 14M (references legacy HVAC provisions of Municipal Code Ch. 18-28; not I-Code based) (with local amendments)	interim/legacy
Plumbing	Interim Chicago Plumbing Code, Title 14P (references Chicago's own plumbing provisions in Municipal Code Ch. 18-29; not I-Code based) (with local amendments)	interim/legacy
Electrical	Chicago Electrical Code, Title 14E (incorporates the 2017 NEC / NFPA 70 with Chicago amendments) (with local amendments)	2017
Energy	Chicago Energy Transformation Code, Title 14N (based on the 2021 IECC), effective Nov 1, 2022 (with local amendments)	2022
Other	Chicago Building Rehabilitation Code, Title 14R (Chicago amendments to the 2018 IEBC), plus Title 14X Minimum Requirements for Existing Buildings (with local amendments)	2019

What building code does Chicago, IL use?

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