An HPD heat violation is certified on time, or not at all.

of Class C heat certifications filed by the certify-by date the notice sets, a median of 13 days after the inspection, across the 73,109 that have both dates

See what is open on one building.

On an HPD heat violation, the city gives a landlord 24 hours to restore heat, and the notice sets a later date to certify the repair, a median of 13 days after the inspection. Owners who certify mostly meet it, at a median of 9 days, and that is the kinder half of the finding. Of the 149,792 Class C heat and hot water violations HPD has recorded since August 7, 2023, 48.8% have ever been certified corrected, and 19,353, 12.9%, have been open for more than a year with no certification on file. Late certification is rare. No certification at all is common.

Two clocks: restoring heat, and certifying it

The 24-hour standard is the clock for restoring heat, and HPD's data has no field for when that happened. The certify-by date is the clock for the certification, a median of 13 days, and the median certification comes at 9. For 12.9% of Class C heat violations there is no certification on file at all more than a year after the inspection. Class C is 94.2% of every heat and hot water violation HPD issues, so the class that carries the 24-hour window is the one nearly every heat violation lands in. Certification year by year is on the research page that froze these figures on September 26, 2026; this page recounts them every time the site is published.

Where heat violations stop

3,705 heat and hot water violations, 2.3% of the total, carry Not Complied With: the certify-by date passed and a reinspection found the condition still there. That figure understates the open work, because a case nobody reinspects never reaches it. 33,998 violations sit at NOV Sent Out with no later status at all: the notice went out, and nothing was recorded after it.

Every status HPD has recorded against a heat or hot water violation, most common first, out of 158,972. Status names link to the status glossary.

How much heavier heat season runs

Heat season runs October 1 through May 31 by the city's housing maintenance code. Eight months of twelve is two thirds of a year, so a share alone proves nothing; the rate is the finding. A month inside the season averages 16,927 heat and hot water violations against 5,109 outside it, 231% heavier, measured across the last 36 complete months so every calendar month is observed the same number of times. A firm that plans its heat work in September is planning for the heavier two thirds of its year; an owner whose boiler is marginal in September has about four weeks before the inspections start. The October turn, month by month, and this season's live count.

How heat compares with the other five categories

Certification rate is the share of a category's Class C violations that have ever been certified corrected. Heat and hot water ranks 2 of 6 on it, at 48.8%. Vermin and pests leads at 51.4%. Speed ranks the six differently from rate: heat's 9-day median is the shortest of the six, against 36 days for lead paint. The gap between heat and the categories above it is not speed, it is the 12.9% that never move at all.

Same scan behind the certification block on all thirty borough and category pages, read citywide. Median days is the citywide median over every certified Class C violation in the category. The six categories are independent text matches, not separate buckets: a violation naming both a leak and mold is counted under both, so these rows do not sum to HPD's total.

Heat violations by borough

Bronx carries 35.4% of the city's heat and hot water violations, 56,216 of 158,972. It also certifies the largest share of its Class C heat violations, 54.9%, so on this refresh volume and certification run together. Each borough's own heat page carries the monthly series, the street list and the status ladder for that borough alone.

Bronx, Brooklyn, Manhattan, Queens, Staten Island.

Common questions about HPD heat violations

What HPD's data does not tell you

It does not say whether the heat came back. A violation at NOV Sent Out may have been corrected the same afternoon with no certification ever filed, or never corrected at all, and HPD's data cannot tell the two apart. It does not carry the temperature that was measured, the date the boiler was repaired or what any owner intended. It says when an inspector confirmed the condition, what status HPD has set since, and whether a certification was filed. That is enough to know whether a building's violations are moving, and no more.

No building and no owner is named on this page. Every figure comes from our copy of HPD's Housing Maintenance Code Violations data on NYC Open Data, inspections from August 7, 2023 through September 27, 2026. How every figure here is counted.