Four fire engines and 21 firefighters and officers were called to a fire at a restaurant in High Street, Teddington.
The ducting from the ground to first floor was completely damaged by fire. Part of the ground floor and part of the first floor were also damaged in the blaze.
Four people left the property above the restaurant before the arrival of the Brigade.
The Brigade was called at 1538 and the fire was under control at 1650. Fire crews from Twickenham, Kingston, Heston and Surbiton fire stations attended the scene.
The fire is believed to have been caused by cooking left unattended.