As of April 2006 there were 410[1] Grade I listed buildings in Suffolk, England.
In the United Kingdom, the term listed building refers to a building or other structure officially designated as being of "exceptional architectural or historic special interest"; Grade I structures are those considered to be "buildings of "exceptional interest, sometimes considered to be internationally important.
The total number of listed buildings in England is 372,905.
[2] In England, the authority for listing under the Planning (Listed Buildings and Conservation Areas) Act 1990[3] rests with English Heritage, a non-departmental public body sponsored by the Department for Culture, Media and Sport.
The list has been divided into the following geographical areas, representing each all the Grade I listed buildings in a single district: