Six people died when a fast-moving fire engulfed a Sunset Park, Brooklyn home where at least 11 residents lived, prompting city investigators to examine a history of unaddressed building complaints and the potential involvement of lithium-ion batteries. Firefighters arrived at the residence in about three minutes and encountered heavy flames visible from every window, trapping multiple occupants inside.
Inspectors closed cases after failing to gain entry
Department of Buildings records show that inspectors visited the property in September and October 2025, and again in February and August 2026, following three separate complaints regarding alleged illegal construction. According to the records, the complaints claimed that the basement had been converted into an apartment and that units on the first and second floors had been subdivided into three apartments each. Investigators closed all four inspection cases because no one answered the door when inspectors arrived.
After multiple unsuccessful inspection attempts, we closed out the complaints,
a department spokesman said, adding that our inspectors do not have the legal authority to use physical force
to gain entry.
Did You Know? City building records document that inspectors visited the Sunset Park property across four separate months between September 2025 and August 2026 before closing the files because no one answered the door.
Investigation Into Batteries and Fire Causes
Fire marshals continued investigating the cause of the blaze, examining whether lithium-ion batteries played a role in the disaster. Crews removed what appeared to be a scooter and a charred e-bike from the debris, though authorities have not yet established whether those items sparked the fire or fueled its intensity.
Citywide data indicates that eight people have died in lithium-ion battery fires in New York City this year, excluding the Sunset Park tragedy. The city recorded 406 fires caused by e-bike batteries resulting in 70 injuries during the same period, up from 241 fires and 42 injuries at this point last year, according to reports.
City officials call emergency hearing to examine agency oversight
City Council Speaker Julie Menin called an emergency hearing later this month to examine agency oversight and determine whether enforcement gaps allowed dangerous conditions to persist. We need to find out how much are the agencies doing,
Menin said. Are there gaps in enforcement that need to be improved upon? So the point of the hearing—and it’s really an emergency hearing—is to get some answers and to really look at what else needs to be done.
Mayor Zohran Mamdani stated that his administration continues to evaluate additional measures to mitigate lithium-ion battery hazards. It continues to be a major source of concern and a priority of focus for our administration, whether it’s exploring additional legislation or it’s exploring additional policy that we can make of the administrative angle,
Mamdani said. Meanwhile, FDNY First Deputy Commissioner Daniel Flynn urged residents to establish clear household escape plans in the event of an emergency.
Investigators examine potential causes of Sunset Park fire
What caused the Sunset Park fire?
Fire marshals were still investigating the cause of the blaze. Authorities have not yet determined whether lithium-ion batteries or alleged illegal construction contributed to the deaths.
Why were the building complaints closed without an inspection?
Inspectors visited the property in September and October 2025 and again in February and August 2026, but closed the cases because no one answered the door. Department officials noted that inspectors lack the legal authority to force entry into private residences.
How many fatalities has the city recorded from lithium-ion battery fires this year?
The city recorded eight deaths from lithium-ion battery fires this year, a total that does not include the six fatalities from the Sunset Park fire.
What steps should municipal agencies take when inspectors are repeatedly denied access to properties with active safety complaints?
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