NYC Local Laws · Defined
Local Law 87 of 2009 (NYC audits and RCx)
New York City’s periodic energy-audit and retro-commissioning requirement for applicable buildings. The current rules establish covered properties, filing cycles, and required documentation.
New York City jurisdiction · Sources checked September 15, 2026. Law numbers repeat by year. These educational summaries are not legal advice or a complete compliance checklist. Later amendments, agency rules, building characteristics, and effective dates determine the requirements for a particular property. Use the linked City sources to confirm current obligations.
Why it matters
An audit identifies opportunities; retro-commissioning addresses system operation. The required submission and any corrective work need to be planned together. A previous assessment should be reviewed against the current filing scope before it is reused.
In practice
A project example
An owner may have an energy study but still need the required operational investigation, corrections, and reporting for the applicable filing cycle.
Technical references
General educational guidance from KOW Building Consultants. Examples are illustrative, not project records. The applicable contract, standard, program, and jurisdiction control the requirements for a specific assignment.