Extensions

My neighbours extension is being rebuilt, but detatched, not semi as it was originally.

Anonymous user 23/02/2024 - 2.41 PM

I hope you can understand what im trying to query. Our semi-detatched houses have a single storey extension to the rear, my new neighbours have knocked down and are rebuilding their side, the adjoining/dividing wall was only single brick construction, but the builder is rebuilding it independently away from the joining wall with their own cavity, only a few inches away from the original wall. This effectivley leaves me with a single brick external wall which i dont think is allowed to be left like that as i bought this house semi detatched and its not my project that is leaving me exposed like this. Im assuming that my new flat roof will be tidied up and finished off but its the wall that concerns me. Our water pipes run along that wall and wont be insulated adequately. Im not sure what really needs to be done but i feel the void needs at least capped off at the backside of the extension to keep out everything from eliments, water, to crawling pests. Can anybody advise if this is common practice or if its ethical? Should i consult my solicitor? Thanks in advance