Four fire engines and 21 firefighters and officers were called to a fire at a garage at a terraced house in Stuart Road, Maida Vale.
Part of the garage and a van parked on the driveway were damaged by fire.
Two adults and five children were led to safety by firefighters through adjacent gardens.
The Brigade was called at 2021 and the fire was under control at 2101. Fire crews from Paddington and North Kensington fire stations attended the scene.
The cause of the fire is under investigation.