The 33-year-old construction worker was found unresponsive when first responders arrived at 1266 50th Street, near 13th Avenue, in Borough Park just after noon.
The man had been working on the home when the first floor of the dwelling suddenly gave way - pinning him under the debris in the basement, officials said.
The worker, whose identity is being withheld pending family notification, was pronounced dead at the scene.
Workers at the site told The Post they'd been hired to construct a "front framing Jewish synagogue."
The construction, however, was being carried out in violation of a "stop work order" that was slapped on the site on Jan. 4 following an earlier complaint, Department of Buildings Commissioner James Oddo said.
"This fatality absolutely should not have happened. They should not have been doing this work, let alone having a bobcat inside this structure," Oddo told reporters at the site of the collapse.
"There could be multiple fines at this location. So the amount may end up in six figures."
Footage showed throngs of first responders and onlookers, including a number of Hasidic Jewish men, flooding the street outside the construction site in the wake of the tragedy.
Investigators were working to determine what led to the collapse, FDNY officials said.
"We're not sure what caused it, there was construction materials on the floor at the time of the collapse, whether it caused it or not I don't know," Ferrante said.
Comment: This all sounds very sketchy and is reminiscent of the recent tunnel scandal involving the Orthodox Jewish community which has mysteriously disappeared from the news cycle. See also:
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