Unemployed Mussa Abid, of Dehavilland Close, was charged by police on Tuesday (October 18) after being arrested on Saturday.
It comes after an 18-year-old was found with stab wounds at an address in Buddings Circle.
Mr Abid was also charged with possession of a knife and is scheduled to appear in custody at Hendon Magistrates' Court on Wednesday (October 19).
London's air ambulance and London Ambulance Service paramedics attended but the victim was pronounced dead at the scene.
Officers said on Saturday they believed they knew the identity of the teenager but were awaiting formal identification.