Insights

NYC Building Energy & LL97 Insights

Practical guidance on Local Law 97 compliance, decarbonization strategy, and energy capital projects for NYC building owners.

Benchmarking September 2026 6 min read

Benchmarking Data Errors and Their Effect on LL97 Penalties

Property use type, gross floor area, and estimated energy data each affect an LL97 penalty calculation. A records review can identify errors before they carry into a filing.

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Leases September 2026 4 min read

Landlord or Tenant: How LL97 Penalty Costs Are Allocated

LL97 penalties are assessed against the owner, and leases determine how costs are shared. An overview of pass-through provisions, allocation methods, and what makes an allocation well supported.

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LL97 March 2026 8 min read

How NYC's Local Law 97 Fines Work and What to Do Before 2030

How LL97 penalties are calculated, which buildings are covered, and why the 2030 compliance period is the one to plan for now.

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Not Sure Where Your Building Stands?

Use our free LL97 calculator to check your building's carbon emissions, compliance status, and estimated fines in under 60 seconds.

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