Firefighters were called to a building collapse on Durham Place in Chelsea.
Two mid-terraced houses of four floors which were under refurbishment collapsed to the ground. There are no reports of any injuries.
The Brigade’s Urban Search and Rescue crews worked to make the scene safe.
Around 40 people were evacuated from neighbouring properties and a 25m cordon was put in place as a precaution by the Metropolitan Police Service.
Station Commander Jason Jones, who was at the scene, said: “There was a total collapse of the building from the roof to ground level.
“Firefighters worked to make the scene safe and our drone team carried out a search.
“A police search dog also carried out an external search of the building and there are no reports of any injuries. Nobody is thought to have been inside the building at the time of the collapse.
“Local road closures will remain in place this morning.”
The Brigade was called at 2334 and the incident was over for firefighters at 0213. One fire engine from Chelsea Fire Station and three fire rescue units from Battersea, Heston and Croydon fire stations were at the scene.