The first Local Law 97 compliance deadline has passed, but building owners still have a chance to get back on track.

Key Extension Details

• If you received an extension, your new deadline is December 31, 2025
• Filing fee: $60
• No professional attestation required
• Already received an extension? Your deadline is automatically extended to December 31, 2025

This extension provides much-needed breathing room, but it is also a reminder to start planning ahead now for your next filing.

Looking Ahead: Energy Storage and LL97

One of the biggest developments tied to Local Law 97 is the Department of Buildings’ (DOB) new rule on Energy Storage Systems (ESS).

Until recently, ESS projects operated in a gray area. Now, the DOB has issued clear guidance on design, filing, installation, and operation, making adoption in New York City much more practical.

Because electrical projects and carbon reduction strategies are closely connected to LL97, energy storage will play a critical role in helping buildings comply with emission limits.

How HLZAE Can Support Your Property

Our team is actively guiding clients through both compliance extensions and forward-looking decarbonization strategies. HLZAE can:

• Design and implement ESS systems for renewables, backup power, and decarbonization
• Provide commissioning and training now required under the new rule
• Manage compliance filings including registration, peer review, and decommissioning

In addition, we help clients secure extensions, avoid penalties, and prepare for the next LL97 filing cycle in 2026. Many owners are choosing to partner with us for multi-year filings, ensuring the process is streamlined and stress-free.

Start Planning Now

Missing deadlines can be costly, but with an extension in place and new guidance from the DOB, there is a clear path forward.

HLZAE is ready to help your property stay compliant, explore energy storage solutions, and position your building for long-term success under Local Law 97.