Four fire engines and 21 firefighters and officers were called to a basement fire underneath a conference centre in Hammersmith Road, Hammersmith.
The fire was contained to a laundry room located in the basement. The control room for the conference centre was alerted when smoke was seen at the front of the premises and two smoke alarms sounded. Around 80 people left the building before the Brigade arrived.
A London Fire Brigade spokesperson said:
"Incidents like this show how important it is to have a working fire alarm in homes but also businesses. That means that if there's a fire, there is a way for that fire to be easily detected and people can be warned easily.”
The Brigade was called at 2047 and the fire was under control at 2223. Fire crews from Hammersmith, Kensington, Fulham, and Chelsea fire stations attended the scene.
The fire is believed to have been caused by a faulty tumble dryer.