Agency fees are often seen as the hidden cost when renting in the capital.
But a new campaign to have them removed has been gathering momentum, with more than a quarter of a million people signing up in just a few months.
We reached out to the Housing and Planning Minister, Brandon Lewis, he said:
"The vast majority of letting agents provide a good service. A blanket ban on charging tenants fees isn't the answer to tackle a minority of irresponsible agents.
"We are tackling high fees by requiring letting agents to publicise a full tariff of their fees giving people the information they want."
Eleanor Cunningham has been looking at some of the issues Londoners currently face.