Work has started to landscape derelict land on the Olympic cycling road race route opposite Hampton Court Palace.
Developer Gladedale, which plans to start building on the Jolly Boatman pub site in 2013, is working with Historic Royal Palaces (HRP) on the site.
The area, which has planning permission for a hotel and flats, will be landscaped with turf, trees and plants.
HRP said the work would be completed by 3 July time for opening of the Hampton Court Flower show.
Gladedale said litter, debris and overgrown vegetation had already been removed from the Jolly Boatman site and clean topsoil would be brought in before it was covered with grass.
The development, which also includes land surrounding Hampton Court railway station, was the subject of a long-running campaign by protesters.
An attempt to block it in the High Court was rejected last year.
The plans include a refurbished railway station, 66 new homes, retail and commercial units, a 46-bedroom hotel and a care home.
Gladedale said the company must meet a number of planning obligations before it could set a date for the start of the development of the site.
The 2012 Olympic cycling road race will cross over the River Thames into Surrey at Hampton Court and take cyclists through Walton on Thames, Weybridge, West Byfleet, West Horsley, Dorking, Box Hill, Leatherhead and Esher.