“Provided that it does not result in disproportionate additions over and above the size of the original building, the extension or alteration of dwellings is not inappropriate in Green Belts. The replacement of existing dwellings need not be inappropriate, providing the new dwelling is not materially larger than the dwelling it replaces. Development plans should make clear the approach local planning authorities will take, including the circumstances (if any) under which replacement dwellings are acceptable.” “Provided that it does not result in disproportionate additions over and above the size of the original building, the extension or alteration of dwellings is not inappropriate in Green Belts. The replacement of existing dwellings need not be inappropriate, providing the new dwelling is not materially larger than the dwelling it replaces. Development plans should make clear the approach local planning authorities will take, including the circumstances (if any) under which replacement dwellings are acceptable.”
“The reports prepared by the officers of the defendant show that the correct question (would the replacement building be materially larger) was asked. A perusal of the relevant reports suggests that the Defendant took into account that which it was required to take into account and did not take into account anything that it should not have taken into account in deciding whether the replacement building would be materially larger. The question was approached objectively by taking account of physical dimensions as well factors such as floor space and footprint. Once that correct test and the correct factual matters relevant to the application of that test have been identified, the answer is one for planning judgment. It is not open to the court to substitute its own decision on the facts for that of the decision maker once the court is satisfied that the correct tests have been identified and applied unless possibly the ultimate decision can be regarded as Wednesbury unreasonable which is not what is alleged here.”