The cause of the fire has not yet been determined.
 Several media outlets reported that it may have been caused by a faulty kitchen appliance.
A fourth-floor resident told the media that it was his neighbour's fridge that caught fire around 1:00 am, and that they immediately began knocking on doors to alert people.
He said that within half an hour the building was entirely engulfed in flames.

Whilst there was much criticism of the lack of fire sprinkler systems, Geoff Wilkinson, the building regulations columnist for the Architects' Journal, wrote in a comment on 14 June, before the cause was known ("we should avoid speculating"), that if a leaking gas riser or the cladding were at fault, sprinklers would have had little effect.
He said he had seen extracts of a fire risk assessment and talk of flammable material stored in the common walkways, suggesting poor overall management.
The cause of the fire has not yet been determined.  Several media outlets reported that it may have been caused by a faulty kitchen appliance. A fourth-floor resident told the media that it was his neighbour's fridge that caught fire around 1:00 am, and that they immediately began knocking on doors to alert people. He said that within half an hour the building was entirely engulfed in flames.
Whilst there was much criticism of the lack of fire sprinkler systems, Geoff Wilkinson, the building regulations columnist for the Architects' Journal, wrote in a comment on 14 June, before the cause was known ("we should avoid speculating"), that if a leaking gas riser or the cladding were at fault, sprinklers would have had little effect. He said he had seen extracts of a fire risk assessment and talk of flammable material stored in the common walkways, suggesting poor overall management.
Grenfell Tower fire