Firefighters have issued a smoke alarm reminder after crews were called to a blaze in a two storey house converted into flats on Althea Street in Fulham on Saturday night.
Six fire engines and 35 firefighters and officers tackled the blaze.
A ground floor flat and the stairwell leading to the first floor were badly damaged by the fire, making the property uninhabitable.
Two people left the property before the arrival of the Brigade. An elderly woman from a neighbouring property suffered from smoke inhalation, and was treated by London Ambulance Service Crews.
There was no smoke alarm fitted in the property. A spokesperson for the London Fire Brigade said:
"Everyone should have at least one working smoke alarm on every level of their home and the safest option is to have those linked together. This will give the earliest warning if there is a fire in your home."
The Brigade was called at 2147 and the fire was under control by 2331. Fire crews from Fulham, Wandsworth, Chelsea, Tooting, Hammersmith and Battersea fire stations attended the scene. The cause of the fire is under investigation by fire officers and the police.