I went to a house viewing yesterday in S London and loved the house. Only question is that the next door neighbours are doing a huge extension including a basement conversion with pool and gym and a gym garden building. Completely out of character with the road which is large 1920s semis (though many are being extended as it’s an affluent area). The neighbours are not living there as it’s a building site currently so I can’t knock and meet them. The house and location is otherwise lovely. I’m a bit worried about the kind of people that would do that sort of work on a house, and whether they might be planning some kind of personal training business in the garden. I need to act quickly as the house was v popular. Would you want more information about the neighbours? Should I do this before or after making an offer?