In the United Kingdom, the term listed building refers to a building or other structure officially designated as being of special architectural, historical, or cultural significance; Grade I structures are those considered to be "buildings of exceptional interest".[1] Listing was begun by a provision in the Town and Country Planning Act 1947. Once listed, strict limitations are imposed on the modifications allowed to a building's structure or fittings. In Wales,[2] the authority for listing under the Planning (Listed Buildings and Conservation Areas) Act 1990[3] rests with Cadw.



  1. ^ Sometimes known as OSGB36, the grid reference is based on the British national grid reference system used by the Ordnance Survey.
  2. ^ The "HB Number" is a unique number assigned to each listed building by Cadw.


  1. ^ "Buildings & Conservation Areas". Cadw. Retrieved 18 June 2013. 
  2. ^ "Coflein". online database of RCAHMW. Royal Commission on the Ancient and Historical Monuments of Wales. Retrieved 28 November 2016. 
  3. ^ "Planning (Listed Buildings and Conservation Areas) Act 1990". The National Archives. Retrieved 18 June 2013. 

See also

External links

Media related to Grade I listed buildings in Torfaen at Wikimedia Commons