There are 21 historic parks and gardens in Westminster on the Register of Parks and Gardens of special Historic Interest. The list is compiled by English Heritage.
There are no additional statutory controls for parks or gardens on the Register but the effect of proposed development is a material consideration in the determination of planning applications.
This act seeks to protect certain squares, gardens and enclosures in Greater London.
It limits the use of London Squares to 'ornamental pleasure grounds or grounds for play, rest and recreation', and the only buildings and structures allowed are those which are 'necessary or convenient for, and in connection with, the use and maintenance of such squares.'