What You Need to Know

The first LL97 filing deadline has now passed, and so has the window to request an extension. If you did not file for an extension, you may be at risk of significant fines. If your property missed the deadline, contact us immediately. Our team can help you take the next steps to avoid costly penalties and get back on track.

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 compliance challenges 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 address missed deadlines, mitigate 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.

Act Now

Missing deadlines can be costly, but there are still steps you can take. HLZAE is ready to help your property respond quickly, stay compliant, explore energy storage solutions, and position your building for long-term success under Local Law 97.