Free tool · NYC Local Law 87
When is your LL87 energy audit due?
Your filing year is set by the last digit of your building's tax block number. Pick that digit to see your deadline.
Example: BBL 1-00835-0041 is block 835, so the last digit is 5.
An LL87 audit plus retro-commissioning usually takes 4 to 9 months. Corrections must be completed before filing.
Schedule your LL87 auditHow do I find my tax block number?
Your borough-block-lot (BBL) number appears on your property tax bill and on the NYC Department of Finance and NYC Open Data property lookups. The block is the middle part of the BBL.
When is the LL87 report due?
The Energy Efficiency Report is due by December 31 of the year whose last digit matches the last digit of your tax block number, and every ten years after that.
Can I get an extension?
DOB allows limited extensions in specific situations, such as financial hardship or a building that is newly constructed. Extension requests have their own deadlines, so check with DOB early.
What happens if I don't file?
DOB can issue penalties of $3,000 for the first year and $5,000 for each additional year the report is not filed.
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