Four fire engines and around 25 firefighters were called to a fire at a house on Primrose Glen in Hornchurch.
Part of a loft conversion and roof were destroyed by fire.
A London Fire Brigade spokesperson said: "Firefighters recommend that you have a look at our online Home Fire Safety Checker to make sure there are no hidden hazards in your home.
“The online tool will ask you a series of questions that will help us work out the level of risk in your home, or the home of someone you care for. It only takes a few minutes to get tailored advice to keep yourself and loved ones safe from fire.”
The Brigade was called at 0502 and the incident was over by 0637. Fire crews from Hornchurch, Harold Hill, Romford, and Dagenham fire stations were in attendance.
The cause of the fire is under investigation.