We've just discovered a squidgy spot in the floor of workshop (which is actually in part of what was the garage before it was very badly converted by the previous owners into a kind of annexe with an office and workshop). Brief inspection reveals the floorboards there are all mouldy so looks like there's some water coming up from somewhere. Also one of the external walls of the house adjacent to the workshop seems to have developed a little crack so dh is panicking about subsidence. It's a period property (1880) but everything was fine on homebuyers survey when we bought 2 yrs ago.
I am very sleep deprived with a newborn and don't even know where to start. Do I call a surveyor? Or a plumber if it's likely to be a leaking pipe somewhere? How much do surveyors tend to charge for specific queries such as this rather than a full house survey?