NYC heat season rules for landlords (October 1 – May 31)
Heat season: October 1 – May 31
Daytime (6am–10pm): if it’s below 55°F outside, the inside temperature must be at least 68°F.
Nighttime (10pm–6am): the inside temperature must be at least 62°F, regardless of the outdoor temperature.
Hot water: all year
Hot water must be provided at a constant minimum of 120°F.
Why it matters
No-heat and no-hot-water complaints are among the most common causes of Class C (immediately hazardous) violations, and HPD can make emergency repairs and bill the owner.
Official source: HPD: Heat and hot water. This guide is general information, not legal advice. Rules change; confirm with the agency.