The blaze broke out around 5:25 p.m. Monday, Oct. 14, in Nesconset.
First responders rushed to the scene at Highland Place after a 911 call.
Thomas Walz, age 62, a resident of the home, was taken out of the house by responders.
Walz was transported via ambulance to Stony Brook University Hospital, where he was pronounced dead.
There were no other people in the house at the time of the fire, and no other injuries were reported.
The cause of the fire is under investigation but does not appear to be criminal at this time, Suffolk County Police said.
Anyone with information on the incident is asked to call Homicide Squad detectives at 631-852-6392 or Arson Section detectives at 631-852-6024.
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