Four fire engines and around 20 firefighters were called to a fire in a restaurant and flats on Kings Road in Chelsea, SW3 on Saturday morning.
Firefighters rescued a woman from the building and she was treated at the scene for smoke inhalation by London Ambulance Service.
Part of the ducting from the ground floor of the restaurant to the roof was damaged by the fire.
The Brigade was called at 1005 and the fire was under control by 1229.
Firefighters from Kensington, Fulham, Knightsbridge and Chelsea fire stations attended the incident.
The cause of the fire is under investigation.