Energy Audits and Retro-Commissioning for Building Owners and Managers As part of New York City’s Greener, Greater Buildings Plan (GGBP), Local Law 87 (LL87) mandates Energy Audits and Retro-Commissioning every ten years for all buildings over 50,000 square feet. LL87 provides building owners and managers insight into energy consumption and building performance with the goal […]