10/22/2026
Texas mechanical project teams have a recent code-reference update worth knowing. Effective September 1, 2026, the Texas Department of Licensing and Regulation updated the code editions adopted by reference under the Air Conditioning and Refrigeration Contractors rules from the 2021 editions to the 2024 editions of the IRC, IMC, IFGC, and UMC.
The practical takeaway is not that every project in Texas now follows one identical code path. Local adoption, the authority having jurisdiction, permit timing, and the contract documents can still affect what applies to a specific project.
For GCs, owners, engineers, and mechanical contractors, the better move is to confirm the applicable requirements early enough for the design, submittal, and permitting conversations to stay aligned.