A notice on the Windsor Great Park website, external states part of the site is to become an exclusion area under the Serious Organised Crime and Police Act 2005.
It is a criminal offence to trespass on protected sites, which include crown land, land belonging to the King in a private capacity and all licensed nuclear sites.
The Waleses will move from their current home at Adelaide Cottage in Windsor, with the change seen as a fresh start for the family following Catherine’s recovery from cancer.
They also have a 10-bedroom mansion, Anmer Hall, on the Sandringham estate in Norfolk, and an apartment in Kensington Palace.
Kensington Palace declined to comment.