I have been working on this house full time now for four years, After many years of neglect and unskilled do-it-yourself personnel. You have to be very careful what you do,As unauthorized work on the house could warrant you to be arrested by the law and given a criminal record. How the Buildings are Chosen

1.3 The principles of selection for the lists were drawn up by the Historic Buildings Council (the functions of the former Historic Buildings Council for England are now carried out by the Historic Buildings and Monuments Commission (HBMC)) and approved by the Secretary of State. They cover five groups:All buildings built before 1700 which survive in anything like their original condition are listed. Most buildings of 1700 to 1840 are listed, though selection is necessary. Between 1840 and 1914 only buildings of definite quality and character are listed, and the selection is designed to include the principal works of the principal architects. Between 1914 and 1939, selected buildings of high quality are listed. A few outstanding buildings erected after 1939.
1.4 In choosing buildings, particular attention is paid to: Special value within certain types, either for architectural or planning reasons or as illustrating social and economic history (for instance, industrial buildings, railway stations, schools, hospitals, theatres, town halls, markets, exchanges, almshouses, prisons, lock-ups, mills). Technological innovation or virtuosity (for instance cast iron, prefabrication, or the early use of concrete). Association with well-known characters or events. Group value, especially as examples of town planning (for instance, squares, terraces or model villages).
1.5 A total of over 435,000 buildings in England had been included in the lists by December 1989.
1.6 The buildings are classified in grades to show their relative importance as follows:-

Grade I (Grade One): These are buildings of exceptional interest (only about 2 per cent of listed buildings so far are in this grade).

Grade II* (Grade Two Star): These are particularly important buildings of more than special interest (some 4 per cent of listed buildings).

Grade II (Grade Two): These are buildings of special interest, which warrant every effort being made to preserve them.