Six fire engines and around 40 firefighters were called to a fire at a restaurant with flats above in Curzon Street in Mayfair.
The restaurants extraction system from ground to third floor was damaged by fire.
The Brigade’s 999 control officers took 15 calls to the fire.
The Brigade was called at 0917 and the fire was under control at 1047. Fire crews from Soho, Lambeth, Chelsea and other surrounding fire stations attended the scene.
The cause of the fire is under investigation.