Three fire engines and around 15 firefighters were called to a fire in a terraced house on Clanricarde Gardens in Bayswater, W2 this morning.
Part of a five room basement flat was damaged by the fire.
The Brigade was called at 0953 and the fire was under control by 1025.
Fire crews from Clapham, Kensington and Paddington fire stations were at the scene.
The cause of the fire is under investigation.