Police are awaiting the results of a post-mortem examination to determine whether the death of a man, whose body was found in an Adelaide backyard, should be treated as suspicious.

Key points: Neighbours said teenagers attending a party at the home discovered the man's body

Neighbours said teenagers attending a party at the home discovered the man's body The street was cordoned off as crime scene examiners attended the scene

The street was cordoned off as crime scene examiners attended the scene Police are investigating how the man died

Neighbours said a group of local teenagers discovered the body, wrapped in carpet, during a party at the home in Bowmore Court at Greenwith, in Adelaide's north-east.

Police were called to the address just before 7:30am, and crime scene examiners have attended the scene.

Neighbour Emily-Rose Benson said she saw the body from her backyard, after it was initially discovered.

"[I saw] an extra-large man wrapped up in a carpet," she said.

"It made me feel sick. I've never even watched a horror movie. It was awful for me. It twisted my stomach.

"I've tried eating numerous times [on Monday], I just can't keep anything down."

Police cordoned off the street after the man's body was found. ( ABC News: Ben Nielsen )

Her mother Bonnie Roper said she suspected the body may have been there for several days.

"The second you opened the back door or the toilet window you could smell it," she said.

"I cannot believe it. I was quite young when they found the bodies [linked to the Snowtown murders] in Salisbury North, and I lived around the corner when that happened. I'm like: 'I can't get away from it'."

Police cordoned off the street as they tried to work out who the man was and how he died. They have since removed the body.

"A post-mortem examination will be conducted [Tuesday] to determine if the death is suspicious, self-inflicted or through natural causes," police said in a statement.

Neighbours reported hearing a commotion overnight, and said the owner of the house was not home at the time of the discovery, but had an open-door policy for vulnerable people.