Sustainable Building What is the 40 60 rule in LEED? March 10, 2026 by Tanp | Leave a Comment The 40/60 rule in LEED refers to the credit weighting for the Building Design and Construction (BD+C) rating system, specifically for New Construction projects. It dictates that a minimum of 40% of the total available points must be achieved in energy and water efficiency categories to earn any LEED certification level. This rule emphasizes the […] Read more ยป