JamesHopeful

Rather harsh! I don't think this will be the case for me, however.

Thank you very much for the replies. In terms of my understanding of the nature of planning permission and the conditions attached to it, I can entirely see how according to letter of the rules the building does need to be built according to the plans for which planning permission has been granted, with PD additions to be added later. However, in practice I still cannot see how this could ever be enforced: if they got a demolition order for the extension/dormer, then the moment it was demolished I could (quite legally) re-build the additions exactly as they were under PD rights anyway! And more importantly, I find it very hard to see the Planning Inspectorate upholding on appeal a council's decision to refuse retrospective planning permission to something which'd be permitted under PD. It'd be madness, would it not? A very sensible question, but I have my reasons: I have seen examples of where PD rights are often bizarrely much more generous than what planners will readily give planning permission for on new-builds, especially with dormer windows. If the ground floor "extension" were included on the plans that means either I or a future owner would have rear extension PD rights on top of it, which is a prospect which might quite reasonably worry the planners (as my "extension" followed by an actual extension at a later date would be far too big!). An interesting thought, thank you, but for reasons distinct to my project I'm not too worried about either of these issues.

I have a simple question which I am sure will have been asked before on this forum, but I can't find the definitive answer upon searching (nor can I find anything at all on the internet more generally about it). If I am granted planning permission to build a brand new house, can I then add (say) a rear dormer window or a 3m rear "extension" (both of which would be within PD rights) to the initial build specification? Or do I technically need to complete the house per the plans, wait a bit, and then undertake the additions per PD rights in a separate scheme of works? If the latter is technically the case, there is surely no way the council could enforce against me (as it seems inconceivable that they would or could refuse -- or even demand that I apply for -- retrospective planning permission for an addition to the plan which is entirely permitted under PD rights!) -- or am I missing something?