LL87/09 Energy Audit & Retro-commissioning “early compliance”

Local Law 87/09 Energy Audit & Retro-commissioning requires New York City buildings over 50,000 square feet every ten (10) years to complete an ASHRAE Level II energy audit and retro-commissioning or “tune-up” of their base building systems (i.e. building envelope, boilers, furnaces, HVAC, elevators, escalators, domestic hot water, electrical and lighting systems).
Do you know the Due Date for your required energy audit and retro-commissioning?

It depends on the last digit of your NYC Tax Block number. How do you find your tax block number?

LL87/09 – Energy Efficiency Report Due Dates  

Last Digit of Block # 0 1 2 3 4 5 6 7 8 9
Report Due by 12/31 of 2020 2021 2022 2013 2014 2015 2016 2017 2018 2019


Click here for a copy of the LL87/09 Law and Rules.


What is “the 4-year rule”?

  • the Energy Audit and Retro-commissioning must be completed within 4 years of filing the EER (i.e. so the work is not “stale”)
  • avoid not being able to raise your low score for several years because of the 4-year rule. (i.e. buildings on Tax Blocks ending in 2 can’t start the work until 2018, (i.e. 2022 – 4 = 2018) but your low benchmarking score is publicly disclosed in 2012 or 2013)

The LL87/09 Energy Audit must include:

  • evaluation of potential energy upgrades, including initial cost and annual energy savings
  • examination of all building systems: envelope, heating, ventilation and A/C, roofing, domestic hot water (DHW), lighting and electrical, elevators and escalators, motors and pumps
  • building systems located in tenant spaces owned and maintained by owner (i.e. heating, central air, water)
  • results in an Energy Audit Report

Under LL87/09 Retro-commissioning your building must comply with the list of 28 building operations measures including:

Operating protocols, calibration and sequencing of:

LL87: Replace broken boiler feed tank float switch, which wastes energy and risks condensate tank corrosion.

LL87: Replace broken boiler feed tank float switch, which wastes energy and risks condensate tank corrosion.

  • Heating, Ventilation and Air Conditioning (HVAC) temperature and humidity set points and setbacks
  • HVAC sensors
  • HVAC controls
  • Load distribution
  • Ventilation rates
  • System automatic reset functions
  • Adjustments to oversized or undersized equipment
  • Simultaneous cooling and heating
  • HVAC system economizer controls
  • HVAC distribution balancing
  • Light Levels
  • Lighting sensors and controls
  • Domestic hot water heater temperature settings
  • Water pumps
  • Water leaks

Cleaning and repairs:retro

  • adjusting equipment, controls and sensors to improve performance
  • Filter cleaning and replacement
  • Light fixture cleanliness
  • Operating condition of motors, fans and pumps
  • Steam trap repair or replacement
  • Manual override remediation
  • Boilers tuned for optimal efficiency
  • Pipe insulation
  • Sealants and weather stripping

training and documentation

results in a Retro-commissioning Report

Energy Efficiency Report (EER) is the combined Energy Audit Report & Retro-commissioning Report submitted together