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What should we do if the project is eligible for more than one rating system?


As explained in the Rating System Selection Guidance, when several rating systems may be appropriate for your project, use the 40/60 rule. To use this rule, first ‘assign’ a rating system to each gross square foot of the building based on the published guidance. Then, determine the percentage of the building square footage assigned to each rating system. Choose the best rating system depending on the resulting percentages. Be sure to include the entire certifying square footage (but no more) in this exercise.

Note that the 40/60 rule is not applicable when selecting between LEED CI and LEED CS. For additional guidance on using LEED CS versus another rating system, see LEED Interpretation 10102.

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U.S. Green Building Council
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