Eight fire engines and around 40 firefighters dealt with a fire at a building under construction on Mount Park Road in Ealing.
A small part of the basement was damaged by fire.
The Brigade was called at 0502 and the fire was under control by 0722. Fire crews from Ealing, Acton, Park Royal, Wembley, Southall, Chiswick and Hammersmith fire stations were at the scene.
The cause of the fire is under investigation.