YorkyD

Correct about the neighbour. I'll follow your advice thank you and seek the LPA pre-application advice. Thank you for your help.

Thanks for the reply. Yes the existing main house has a flat roof which we want to replace with a pitched roof. Other local properties which had the flat roof have converted to pitched roofs but these are both properties either side of the party wall. Would planning pass only one property with a pitched roof despite the other property remaining as a flat roof?

Hello everyone, I live in a semi-detached flat roof property and am planning a 2-floor rear extension. Whilst I'm at it I'd like to ideally replace the felt roof with a pitched roof. Would this need planning or would it be possible despite next door still staying as a flat roof? Thanks