Police were called to the Koonoona Avenue home about 11.30pm following reports of a home invasion.
The occupant of the granny flat, who was livestreaming on a social media platform at the time, answered a knock at the door and was punched in the face, knocking him to the ground unconscious.
Two men wearing balaclavas entered the home and threatened the female occupant with a firearm, before stealing clothing and fleeing.
A 33-year-old man was treated for a laceration to his head and taken to hospital in a stable condition
Detectives have commenced an investigation into the incident and as inquiries continue, anyone with information is urged to contact Crime Stoppers on 1800 333 000.
Home invasion livestreamed
THE attack of a man in Villawood last Saturday night was captured live for all to see on social media.