New York City's Local Law 97 (“LL97”), part of the Climate Mobilization Act, requires large buildings to cut greenhouse gas emissions, aiming for a 40% reduction by 2030. Compliance is essential to avoid financial penalties and contribute to NYC’s ambitious climate goals. Here are actionable steps to prepare:

1. Understand your building’s emissions profile

Evaluate your building’s current carbon emissions to determine how they align with LL97 limits. Use benchmarking tools to highlight areas of high energy use and inefficiency. This data will guide decisions on the necessary upgrades and retrofits to meet compliance.

2. Conduct an energy audit

An energy audit assesses the building’s energy systems, including HVAC, lighting, and insulation. This analysis highlights areas where retrofits or operational changes could significantly reduce emissions. NYC’s Local Law 87 mandates energy audits for some buildings, making it a natural starting point for LL97 compliance.

3. Develop a decarbonisation plan 

Plan upgrades to improve energy efficiency and reduce emissions. Common strategies include:

• Replacing old HVAC systems with energy-efficient models.
• Installing LED lighting and automated controls.
• Investing in renewable energy sources, like solar panels or geothermal systems.
• Improving building envelope insulation.

A clear plan ensures compliance within budgetary constraints while maximising long-term savings.

4. Incorporate renewable energy solutions

Buildings can benefit from on-site renewable energy generation to offset carbon emissions. Solar panels, wind turbines, and heat pumps are viable options. Additionally, consider purchasing Renewable Energy Credits (RECs) to meet emissions targets.

5. Leverage smart technology

Smart building technologies, such as digital twins and IoT devices, can enhance energy use. Platforms like Retransform’s Secure help track real-time emissions, benchmark performance, and automate compliance reporting, making it easier to meet regulations like LL97. Its automated LL96 feature continuously monitors the energy efficiency and carbon limits of your assets, automatically filing compliance reports to LL97 authorities. Additionally, Secure integrates seamlessly with ENERGY STAR Portfolio Manager, a critical tool for meeting these regulatory requirements. All of this is streamlined into a few simple clicks, saving time and reducing administrative overhead. Beyond compliance, these technologies also assist in decarbonisation modelling, allowing you to compare retrofitting costs with potential fines.

6. Explore financing and incentives

NYC offers financial incentives, such as Property Assessed Clean Energy (PACE) financing, to support energy efficiency and renewable energy projects. Research available programs to fund upgrades while minimising upfront costs.

7. Engage with experts

Compliance with LL97 involves complex calculations and planning. Collaborate with energy consultants, engineers, or property management firms specialising in LL97. Their expertise ensures accurate reporting, better upgrades, and strategic alignment with city requirements.

8. Monitor and report consistently

From 2025, building owners must submit annual energy and emissions reports. Establish a system for continuous monitoring to ensure ongoing compliance. Automated platforms simplify data collection and reporting, reducing administrative burdens.

9. Plan for future compliance periods

LL97’s thresholds tighten after 2030, requiring additional reductions. Anticipate future requirements by implementing flexible, scalable solutions that ensure compliance beyond the current period.

10. Train your team

Educate your facility management and operational staff on energy-saving practices and compliance requirements. Their involvement is crucial to achieving emissions targets and maintaining efficient building performance.

Why compliance matters

LL97 penalties for exceeding emissions limits are steep—$268 per metric ton of CO₂ equivalent. Non-compliance also risks reputational damage and decreased property value. Proactive measures not only avoid fines but also position properties as environmentally responsible, potentially attracting tenants and investors prioritising sustainability.

Preparing for LL97 is not merely about compliance; it’s an opportunity to future-proof your building, enhance efficiency, and contribute to NYC’s climate objectives. Start today by auditing your building, leveraging smart tools, and committing to sustainable practices to ensure long-term success.

About Retransform

Retransform, an Apex Group company, is a global real estate service provider offering Proptech, Technology Solutions and Business Managed Services to commercial, retail, residential, and corporate real estate customers. Retransform are experts in developing and implementing state-of-the-art technology tailored to their clients’ business requirements. With offices across North America, Europe, the Middle East, India, and Australia, Retransform serves over 300 customers, supporting more than 2 billion sq. ft. of real estate globally.

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