Some friends (not that close but long term) are expecting their first baby in their mid and late 30s. They're planning major house redevelopment, extension and conversion during her maternity leave because she'll be there, "not working and able to oversee". This strikes me as a really bad idea, builders everywhere, crashing and thumping, coming and going for months while she's trying to get used to her first newborn. I don't think they want to hear what I want to say. WWYD?