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Hi. Am I allowed to change the roof shape for a 6m rear extension after planning approval (neighbourhood consultation)? Can we change the type (shape and size) and no of skylights and the roof pitch  (say from flat roof to pitched roof instead) as long as we stay within the limit of the permitted development guidelines of 4m height of ridge and 3m eaves. Our house is end of terraced for a block of 3 houses and we are not sure on the roof shape as yet but need to submit asap. We are not sure if we should stick with 3m flat roof or go for pitched roof with upto 4m ridge and 3m eaves (in terms of cost and neighbour objections).
?
Many thanks in advance!

You would need to submit a revised PA application as what you end up with isn’t what you currently have sought PA for. The description of the proposals on PA applications are quite detailed too so wouldn’t tie up with a revised roof design.