Four fire engines and around 25 firefighters were called to a flat fire on Fellows Road in Swiss Cottage.
A small part of a four-roomed flat on the third floor of the building was damaged by fire. Two men were treated on scene. Firefighters led three dogs to safety who were returned to their owner.
The Brigade’s 999 Control Officers gave fire survival guidance to residents on how to stay safe before crews arrived.
The Brigade was called at 1842 and the fire was under control by 1949. Fire crews from West Hampstead, Kentish Town, Euston and Paddington fire stations attended the scene.
The fire is believed to have been accidental, but the exact cause has been recorded as undetermined.