Four fire engines and 21 firefighters and officers were called to a fire at a house in St Petersburgh Place in Bayswater.
Part of the second floor of a terraced house was damaged by the fire. There were no reports of any injuries.
The Brigade was called at 0023 and the fire was under control at 0107. Fire crews Kensington, Paddington and North Kensington fire stations attended the scene.
The cause of the fire is under investigation.