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Adopted codes online

The division works to ensure the adopted codes and standards are accessible. Eight of the adopted specialty codes are available to read online. The remaining codes consist of multiple standards listed on the program pages.

Amendments, errata, helpful tools, and additional information can be found on the code program pages.
The current or most recent code adoption process information can be found on the code adoption pages.

Commercial structures

*During the phase-in period, use of the 2019 OSSC or the 2022 OSSC is permitted.


Energy efficiency
  • Effective April 1, 2021, with a six-month phase-in period
  • Mandatory Oct. 1, 2021
  • Construction standards: ASHRAE Standard 90.1-2019
Residential structures
Electrical
Mechanical

*During the phase-in period, use of the 2019 OMSC or the 2022 OMSC is permitted.


  • Effective Oct. 1, 2019
  • Based on the 2018 International Mechanical Code (IMC) and International Fuel Gas Code (IFGC)