The fire has taken hold of a loft conversion and part of the first floor of the detached house in Feltham, Surrey. Seven fire engines have dashed to the property on a residential road just off the A316 in the commuter belt.
In a tweet, London Fire Brigade said: “Seven fire engines and around 50 firefighters were called to a house fire on Queens Avenue in Feltham.”
Investigation work is underway to determine the cause of the fire but it is thought no one has been seriously injured.
Fire fighters were initially called to reports of the blaze at around 8am, Surrey Live says.
In an initial statement, the fire service had said: “Six fire engines and around 40 firefighters have been called to a house fire on Queens Avenue in Feltham.
“Part of a loft conversion and part of the first floor of a detached house are alight.
“The Brigade was called at 0802. Fire crews from Feltham, Twickenham and Richmond fire stations are at the scene.
“The cause of the fire is not known at this stage.”
However, since this communication, the service has sent another engine with more fire fighters.