Building Codes for all permits initiated on or after January 1, 2026
- 2024 International Residential Code (IRC)
- 2024 International Building Code (IBC)
- 2024 International Energy Conservation Code (IECC)
- 2024 International Existing Building Code (IEBC)
- 2024 International Fuel Gas Code (IFGC)
- 2024 International Mechanical Code (IMC)
- 2024 International Plumbing Code (IPC)
- 2024 International Property Maintenance Code (IPMC)
- 2024 International Swimming Pool and Spa Code (ISPSC)
- 2023 National Electrical Code (NEC)
2025 Wildfire Resiliency Code - Effective January 1, 2026
The Board of County Commissioners unanimously adopted the 2025 Wildfire Resiliency code with Larimer County Amendments on September 22, 2025.
2023 National Electrical Code - Effective August 1, 2023
The 2023 edition of NFPA 70 National Electric Code (NEC) was adopted by the State of Colorado and enforced by Larimer County, effective August 1, 2023.
Amendments
Where can I find more information?
- Significant Changes to the 2024 International Code
- International Codes and “Significant Changes” books for purchase
- Read-Only Version of Each International Code
- Read-Only Version of the National Electrical Code (NEC)
- Codes Adopted in Larimer County
- Please contact the Chief Building Official by email to building@larimer.org with questions, comments, or to be notified of our webinar(s)
