Labour have taken Lewisham Council - five days after the votes had been cast.
The delay to the outcome, which is last of London's local council election results in 2010, was as a result of many recounts at the Grove Park ward.
The south London local authority had previously had no overall control.
Labour now has control of 17 councils in London, the Tories 12, the Liberal Democrats two, and two have no overall control.
More than 6,000 candidates contested 1,861 seats in 32 boroughs.
Three borough mayoral elections also took place last week
Labour's Sir Robin Wales was been re-elected mayor of Newham, Labour's Jules Pipe was re-elected mayor of Hackney and the party's Steve Bullock was re-elected as mayor of Lewisham.