The Fire Department said two people were hospitalized. One was seriously injured. Ten people refused medical attention.
Fire officials said the third floor of the private home in Far Rockaway, Queens, collapsed onto the second floor Saturday night.
One person was trapped and had to be extracted.
The cause of the collapse is under investigation.
Far Rockaway is a remote neighborhood on a peninsula south of John F. Kennedy International Airport. It is about 23 miles southeast of Manhattan.
