Greens expect to win new seats on a number of London borough councils and could end up holding the balance of power on one or two.
Noel Lynch, Coordinator of London Green Party said: "Voters are completely disillusioned with the other main parties and their look-a-like policies. We are getting a very encouraging response on the doorstep and expect to make gains across London on Thursday.
"We are fielding 522 candidates, more than twice that in 1998. Since then, we have seen Jean Lambert elected to the European Parliament and three Greens elected to the London Assembly. Londoners know that they can trust us to work hard for their concerns."
At the last set of local elections in 1998, the Green Party secured second place to Labour in wards in Camden, Hackney, Haringey, Islington, Lambeth, Lewisham and Merton. This time Greens are expecting to make gains in several London boroughs on May 2nd.