We are considering demolishing our attached garage and building a similar sized (3.5m x 7m) dormer chalet extension in its place.

Couple of questions:

1) Does anyone have any indicative costs per sqm for such an extension? Is the dormer bit the same per sqm?

2) We are considering putting a new window in which overlooks next door. We have a gable end window already overlooking the same neighbour – the new window will be 3 metres to the right and a metre back from the existing window in its own dormer. Will this need planning permission as if not we may get away with just building regs?

Sorry if these sound a bit daft – I’m a newbie to this sort of caper :)

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