Who is covered
New construction projects. Small buildings (under 7 stories) comply first; buildings 7+ stories phase in later.
What the law requires
- Design all space heating, domestic hot water, cooking, and clothes drying to operate without on-site fossil fuel combustion.
- Electrify HVAC systems (heat pumps), cooking (induction or electric), and water heating.
- Include LL154 attestation on DOB construction filings.
Filing frequency and deadlines
Penalty structure
Non-compliance with LL154 can result in the following penalties:
- DOB will not approve construction documents or issue a TCO/CO for non-compliant new buildings.
Exemptions
- Commercial cooking equipment in restaurants, manufacturing, emergency backup power, and labs.
- Existing buildings are not required to retrofit under LL154.
Recent updates and amendments
DOB issued implementation guidance in 2024 clarifying the boundary between 'substantial alteration' and 'new construction'.
Reference
Official source: NYC Sustainable Buildings — LL154
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