Four fire engines and around 25 firefighters were called to a fire at a mid-terraced house on Myrtle Road in Hounslow.
Half of the ground floor and part of the first floor were destroyed by fire.
The Brigade was called at 0009 and the fire was under control by 0117. Fire crews from Heston, Feltham and Southall fire stations were in attendance.
The cause of the fire is underdetermined and is under investigation by the Brigade’s fire investigators and the Met police.