The 28-year-old victim, of Jennett's Park, was left with bruises on her face and body when the thug knocked on her door at about 4.30pm on Monday, June 24.
Police say he was looking for a previous occupant.
He is described as being in his early 30s, about 6ft 4ins and of heavy build.
Officers have released the e-fit of a man (right) who they would like to speak to in connection with the assault.
Investigating officer Detective Constable Alex Beever said: "This was clearly a frightening ordeal for the victim and I am appealing for anyone who recognises the man in the e-fit to call us as soon as possible."
Anyone with information can contact Det Con Beever via 101 or, to remain anonymous, call Crimestoppers on 0800 555 111.