Building Decarbonization Requirements: New York City Case Study

Summary

This practice note examines the building decarbonization requirements implemented by New York City's Local Law 97 (LL97). LL97 mandates that most large buildings comply with strict greenhouse gas (GHG) emissions limits starting in 2024, with progressively stringent limits every five years until achieving net zero by 2050. The practice note provides a detailed case study of LL97's implementation, amendments, and compliance procedures, and underscores the significant role of New York City's regulatory framework in the broader context of nationwide building decarbonization efforts.