Eight fire engines and around 60 firefighters were called to a fire at a café on Popes Lane in Ealing.
Half of the ground floor and most of the roof of a single storey, detached café were damaged by fire. There were no reports of any injuries.
Station Commander Peter Wolfenden who was at the scene said: "Road closures were put in place whilst crews worked hard to bring the fire under control and stop it spreading further.
"The fire was located within the roof of the building and crews used cutting gear to gain access and extinguish the fire.
"The café has a historic display area and firefighters safely removed three horse-drawn carriages and two bicycles from the nineteenth century from the building."
The Brigade was called at 0054 and the fire was under control by 0426. Fire crews from Acton, Chiswick, Ealing, Richmond and surrounding fire stations were at the scene.
The cause of the fire is under investigation.