Johnson revealed his backing for the Games as part of Mayor's Question Time yesterday morning (22 May), which took place at City Hall. He said: "I think it would be wonderful for London to host this event and I support such a bid."
Andrew Boff, Conservative London Assembly member, quizzed the Mayor about the potential expenditure of hosting the event.
In response, Johnson said: "I could only guesstimate of the costs, it will be far, far lower than the Olympics – a fraction of that – because we have all the venues already."
He added that London was already seeing economic benefits from the Olympic Games. "I want to see the same benefits for the Commonwealth Games," said Johnson.
Neale Coleman, the London Mayor's adviser on Olympic legacy, revealed in March that a bid from London for the 2022 Commonwealth Games "is something that is certainly in our minds at the moment".
Commonwealth Games England said in a statement that the Greater London Authority’s intention to bid was a "positive initiative", adding: "We can confirm that to date we have not made a formal expression of interest in bidding for the Games, and instead remain focused on preparations for Glasgow 2014.
"Our board is planning to assess the merits of an English bid, and we will consult with our stakeholders in order to evaluate our position."
The last time London hosted the Commonwealth Games was in 1934, when it was known as the British Empire Games.
The event took place in Manchester in 2002 and will be staged in Glasgow next year.
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