"Conservation Areas are areas of architectural or historic interest. They were first introduced in England in 1967 in recognition of the fact that the quality of historic areas depends not only on the quality of individual buildings but also on the historic layout of properties, the use of characteristic building materials, public spaces, trees, views between buildings and along streets. Reviews of Conservation Areas are carried out periodically. If significant change has occurred or if additional areas of special interest are identified, then changes to the boundaries of Conservation Areas may be proposed and consulted on.