The body of a 36-year-old man was found at a property in Gainsborough on Monday, but police said there are no suspicious circumstances.
Lincolnshire Police and an ambulance attended the scene on Ropery Road at 4.35pm on October 5 after reports of concern for the occupant.
A file has been passed onto the coroner.
A spokesperson for Lincolnshire Police said: “We had been called to a house following concern for the occupant.
“We found the body of a man, aged 36 years, in the house.
“There are no suspicious circumstances and a file has been passed to the coroner.”