A neighbour of mine is currently renovating a small workers cottage in the inner city area - it involves demolition of existing extensions to the rear and building new structures (external walls/roof).
He is proposing (attempting) to do these works without planning permission (within the regulations of exempted development). He is concerned by the rule that the private open space that remains after an extension must be minimum 25m/sq - this will not be possible given the restricted area of the site.
With the existing provision of private open space less than 25msq (currently approximately 12msq), it could be argued that he is not 'extending' the property and he is rebuilding on the same footprint area of the existing house (although the configuration of the private open space will change).
Has anyone any thoughts on this interpretation of the regulations in this regard?
How do you define the difference between 'development' and 'renovation' under the planning regulations?