The thing is that neighbours, especially next-door neighbours, are a special species to all of us who live within a few yards of them. If you actually share walls then they need to be treated with very soft and gentle kid gloves. The only positive to this situation is that we are also their neighbours, so should hopefully also be treated extra carefully.
Presumably most people who actually own their own homes will want to live there for at least 3 years? If they are anything like me - I found house moving very stressful and exhausting - they will want to make their new home as comfortable as possible, within whatever time limits and cost restraints they need to impose on themselves, and to live there for as long as possible.
We lived in our last house for over 25 years, and my next door neighbours (detached) are still living there now. So the point I am trying to make, is that most of us will put up with behaviour from our close neighbours that we wouldn't put up with from anyone else, as living for years next to people with whom we may have to interact on a daily basis, and/or maybe listen to arguments, love making (hopefully not) and all sorts of things that we usually only ever witness within our own families, and maybe not even then, is a very special set of circumstances.
Therefore, I suspect that most of us do not want to be at loggerheads with people we see, and/or hear, far more often than our own extended families. So we will put up with more than we normally would from nearly anyone else in our daily lives, and because of that we are very shocked if one day our neighbours can't put up with it anymore, and do things like making complaints to the local council because of it. I think that whenever possible we should cherish our relationships with our close neighbours, keep them up to date with any unusual or unfair interuptions we may cause them to suffer through - I think 18 months of building works warrants the verb "to suffer" - and certainly try to lessen any disruption and annoyance we cause them.