Four fire engines and around 25 firefighters were called to a fire at a house converted into flats in Warwick Square in Pimlico.
Half of the kitchen of a flat on the second floor was damaged by fire.
The Brigade was called at 1114 and the fire was under control at 1215. Fire crews from Lambeth, Soho and Chelsea fire stations attended the scene.
The cause of the fire is under investigation,