Colorado updates energy codes pushing towards net zero construction by 2030

The Colorado Energy Office convened the Energy Code Board on April 27, 2025, to discuss significant updates to the Low Energy and Carbon Code, particularly focusing on energy use intensity (EUI) targets and renewable energy requirements for new buildings.

During the meeting, board members highlighted a slight reduction in predicted EUI for various building types under the proposed code amendments. For instance, a 100,000 square foot multifamily building in climate zone 5b is projected to achieve an EUI of 46, compared to a baseline of 80 under the current code. This reduction aligns with the board's goal of moving towards net-zero energy-ready buildings.

A key point of discussion was the potential requirement for on-site renewable energy generation. Board members expressed the need to understand how these EUI targets compare to existing building codes and whether the board should consider mandating on-site renewables. The conversation also touched on the option for off-site renewable energy solutions, such as community solar gardens and renewable energy credits (RECs). Specific procurement requirements were outlined, emphasizing that RECs must be generated within a year of use and that the generating assets must be constructed within five years prior to building occupancy.

Additionally, the board reviewed updates to Appendix CD, which removed the all-electric version of the glide path, leaving a single compliance pathway aimed at increasing energy efficiency and achieving net-zero new construction by 2030.

The meeting underscored the board's commitment to enhancing energy efficiency standards while navigating the complexities of renewable energy integration in Colorado's building sector. As the board continues to refine these codes, the implications for future construction practices and energy consumption in the state remain significant.