These adoptions are a significant step toward ensuring the safety, efficiency and resiliency of New York City
February 2, 2026
New York City has adopted the 2025 NYC Energy Conservation Code based on the 2024 International Energy Conservation Code and the NYC Existing Building Code based on the International Existing Building Code.
Both ASHRAE 90.1-2022 and the 2024 IECC are published and available for adoption. Adoption will vary by region, but the direction is clear: expectations for tighter, more resilient building envelopes continue to rise as more municipalities move toward these standards into 2026.
Recent studies have shown that CI alone may not be enough for a building to achieve its designed level of energy efficiency. It’s time to look beyond CI alone and consider a holistic approach to façade design.
Persistent and escalating heat is demanding a reassessment of how we design our cities, construct our buildings, and manage resources to adapt to these conditions.
Roof replacements shall comply with Section C402.1.3, C402.1.4, C402.1.5 or C407 where the existing roof assembly is part of the building thermal envelope and contains insulation entirely above the roof deck.
We contracted with Home Innovation Research Labs to create a “TechSpec” that lays out how you undertake the practice of using buried ducts in standard vented attics.