Hoping someone can clarify

MeteredOut

OP, you'll get the best advice if you answer the questions that were asked when you first posted this.

A picture would help.

(I've suggested mods merge this with the previous post)

funnibunni

Gosh thankyou for all responses , 
the extension was built in 1988, we have planning permission documents & architects plans . I managed t9 track down our old neighbours son & had a chat with him ,he confirmed his mum had notification of planning & didn’t lodge any objections 
Our current neighbour has been there for 8 yrs & this was never a problem .. when she viewed the house ,put in offers, had surveys done etc etc  until she was told by the council to reduce the height of fencing at the front of the house .. since then we have been blamed for all sorts of things, they had a hardstanding put at the front ( not a drive as no drop kerb) & it was the company tho did this work who informed us about the fence …. A few months later this hard standing  was being dug up ..her mother then stood out side accusing us of report the original one for having tarmac “ not being porous  enough “ ….. in order to report a hardstanding for concerns about water etc coming on to your property you have to have evidence , videos or photos of the amount of water before they will even consider it .. he have nothing ,we didn’t complain so have no idea why they had it dug up , surely if it was wrong you go back to the original company & get them to redo it .. not pay someone else