Next door neighbour....AIBU

[Issummeroveryet]

I've recently moved into a new house after separating from my ex. The house is the second in a row of 4 new builds. Next door have been lovely, knocked on when we were moving in and introduced himself and offered help if needed. I have a massive problem with them though. The way the house is set up the only downstairs living space is on the back with patio doors onto the garden. On a day like today when its nice I obviously like to have the doors open. Next door is obviously a weed smoker and although its not constant there are times when the smell comes straight over the fence into the house. I've got 2 children so obviously don't want them breathing in in.
So would IBU to speak to him or the landlady about it (we have the same landlady) or should I just leave it and shut the door if I smell it?

They will most likely not be allowed to smoke indoors due to the terms of the contract, so don't ask them to do that. Perhaps ask them to move further down the garden/limit it during the day on sunny days when the children are outside.

Fundamentally though, it cannot harm you or your children, however much you dislike the smell. In that much fresh air, it just can't. The lit on second hand smoke all assumes indoor concentrated air, exposure over decades and so on- you dislike the smell, which is fair enough, but there isn't any tangible health risk here, it's just a bit annoying. I don't like the smell of weed or smoke, but if it were occasional, I wouldn't make a fuss about it, especially with autumn coming, as you won't be sitting outside for months anyway.