Fire and Rescue NSW (FRNSW) received numerous calls about 8.30pm and when firefighters arrived they found smoke and flames issuing from a single level unit, flanked either side by two-storey apartments.
Firefighters in breathing apparatus immediately began attacking the blaze and found there were no occupants in the unit.
Several residents were evacuated from the adjacent units.
The middle apartment was severely damaged by the fire.
A FRNSW spokesperson said the cause of the blaze will be determined by the Fire Investigation Unit and NSW Police.
Neighbours evacuated when fire erupts
Nearby residents were evacuated after a fire erupted in a unit in Revesby last night.