Lead paragraph
Building codes are a universally accepted approach to requiring and enforcing consistent measures of performance for new residential, mixed-use, and commercial construction.
PolicyĀ /
6Phased Building Codes and Amendments
Progress
- Not started
- Planning
- Implementation
- Continuous
Late
Due to the delayed timeline of the 2024 IECC code books and the shifting legal landscape on building electrification requirements, the Northwest Regional Code Cohort is revising the original Net Zero Roadmap. The new Roadmap was finalized in June of 2025. In addition, the State is currently developing the low energy and carbon code requirements. Final State low energy and carbon code will be finalized in Sept. Due to the delays and overlap with the State's requirements, the cost analysis is delayed. All of these factors have resulted in a delay in bringing code amendments to City Council. A discussion on which code pathway to pursue will be going to City Council in Aug. 2025.
Description
Updating and enhancing building codes is a continuous process that includes rigorous evaluation, regional planning, and stakeholder engagement. Longmont's policy is to adopt each new version of the International Energy Conservation Code (IECC) as it becomes available.
The City of Longmont is participating in the Northwest Metropolitan Regional Energy Code Cohort to review the 2024 IECC and establish a regional roadmap to achieve net zero new construction codes by 2030. The Cohort also has been following the requirement for the Colorado Energy Office to promulgate a model low energy and carbon code intended to minimize carbon dioxide emissions associated with new and remodeled residential and commercial buildings no later than July of 2025. Municipalities are required to adopt the model low energy and carbon code, or code that achieves equivalent or better energy performance, when they update a building code after July 1, 2026. The Cohort has developed amendments to the 2024 IECC and the State's low energy and carbon code for jurisdictions to consider as they adopt the next cycle of energy code.
Tasks
What has been done?
- 07/22/2025
Electrification building code impact analysis
Longmont City Council will consider code recommendations presented by staff in 2025, including the delayed 2024 IECC, the State's low energy and carbon code, and the Cohort's recommended amendments. To help inform a decision by City Council, City Staff have contracted with a building modeling firm to look at the impacts (financial and climate-related) of the 2024 IECC, the State's code, and Cohort amendments.