Four fire engines and around 25 firefighters were called to a fire at a house converted into flats on North Road in Belvedere.
Part of a ground floor flat in the three-storey building was damaged by fire. There were no reports of any injuries.
The Brigade was called at 2315 and the fire was under control by 0045. Fire crews from Erith, Plumstead and Bexley fire stations attended the scene.
The cause of the fire is under investigation.