How should a project team decide which rating system to use for a mixed-use project with over 50% retail space?

The 40/60 rule is a guideline established by LEED that aids in determining the appropriate rating system for mixed-use projects based on their space composition. According to this rule, if a project has more than 40% of a certain space type, that space type can drive the selection of the LEED rating system. In the case of a mixed-use project with over 50% retail space, it indicates that the retail component is the predominant use. Thus, using the 40/60 rule allows the project team to choose the rating system that aligns most closely with the major function of the building, which is critical for ensuring that the project meets relevant standards for the activities and operations associated with that space type.

Following the predominant space type only would not take into account the additional characteristics of the mixed-use nature of the project, which can lead to a less appropriate rating system choice. The choice of following LEED guidelines for educational facilities would not be relevant unless the project is primarily intended for educational use, which it is not. Selecting the highest rating available does not ensure that the chosen rating system is suitable for the specific needs and usage of the project unless it aligns with the predominant activities occurring within the building.

Using the 40/60 rule