Four fire engines and around 25 firefighters were called to a flat fire on Holman Drive in Southall.
A small part of a bathroom in a fourth floor flat in an eight storey block of flats was damaged by fire.
The Brigade was called at 1433 and the fire was under control by 1525. Fire crews from Southall, Acton and Heston fire stations were in attendance.
The cause of the fire is under investigation.