Two fire engines and 10 firefighters and officers were called to reports of a fire at a building under refurbishment on Bourlet Close, Fitzrovia, this morning.
A small part of the ground floor of the four-storey building was damaged by fire.
Three men were treated at the scene by the London Ambulance Service.
The Brigade was called at 1100 and the fire was under control at 1139 Fire engines from Lambeth and Soho fire stations attended the scene.