2025 New York State Energy Conservation Code

The 2025 Energy Conservation Construction Code of New York State sets the standard for energy-efficient commercial and residential construction. Based on the 2024 IECC with NY amendments, it strengthens building envelope performance with higher R-values and tighter air leakage limits. Effective December 31, 2025, it mandates improved HVAC, ventilation, and high-efficiency water heating systems. The code also promotes electric-ready design, solar integration, and EV infrastructure. While all-electric mandates were planned, fossil-fuel restrictions in new buildings are currently suspended. Ideal for designers, builders, and owners seeking compliance, lower energy costs, and future-ready buildings.