All buildings built before 1700 that survive in anything like their original condition are included, as are most buildings built between 1700 and 1840. Between 1840 and 1914 only buildings of definite quality and character are listed. Occasionally exceptional modern buildings may be listed.
Buildings are classified in grades to show their relative importance:
In choosing buildings for listing particular attention is paid to:
You can apply online to have a building/structure listed via English Heritage.
The 'list' itself is managed by English Heritage, but the final decision whether or not to list, is made by the Department for Culture, Olympics, Media and Sport.
The Department for Culture, Olympics, Media and Sport have published 'Principles of Selection for Listing Buildings', as a guide to the selection criteria. English Heritage also give information on selection guidelines.
Requests for a building to be spot listed can be made to the Secretary of State for Culture, Olympics, Media and Sport at any time, although priority will be given to those buildings which are under threat.