A man's body was found inside a house after police were called to the address.
Durham Constabulary says officers attended a house in Sixth Street, Horden, following reports a body had been discovered.
When the property was checked, they found the body of a 52-year-old man.
A spokesman said: "His death is not being treated as suspicious, and a file is being prepared for the coroner."
The call out was made at around 9.30pm on Tuesday.