Six fire engines and around 40 firefighters have been tackling a fire at a mid-terraced house and loft conversion on Keats Way in Greenford.
Part of a second floor loft conversion and a small part of the first floor were damaged by the fire. There were no reports of any injuries.
One of the Brigade's 32-metre turntable ladders was used at the scene as an observation tower to provide the Incident Commander with an aerial view of the fire.
Control Officers took the first of five calls at 1214 and mobilised crews from Southall, Ealing, Hillingdon and Acton fire stations to the scene. The fire was under control by 1258.
The cause of the fire is under investigation.