Ten fire engines and around 70 firefighters were called to a fire at a church hall in Neasden Lane in Neasden
Half of the ground floor and all of the roof of the building were damaged by fire.
The Brigade was called at 0401 and the fire was under control at 0716. Fire crews from Willesden, West Hampstead, Wembley, North Kensington, Hendon and other surrounding fire stations attended the scene.
The cause of the fire is under investigation.