Four fire engines and around 25 firefighters tackled a fire at a disused storage building on Kilburn High Street in Camden.
The entirety of the ground floor and half of the first floor of the two-storey building were damaged by fire. There are currently no reports of any injuries.
The Brigade's 999 Control Officers received around eight calls to this fire, with the first call received at 1516. Control Officers mobilised crews from West Hampstead and Paddington fire stations to the scene.
The cause of the fire is under investigation by the Brigade and Metropolitan Police Service.