I'm house hunting and, at the risk of sounding like a complete nightmare, my list is pretty extensive - however, I've yet to find a property which I like enough to consider making an offer - at which point ALL the following would be asked; (and it's then debatable how honest or forthcoming any vendor is going to be, which is why a full structural survey would also be undertaken)
Recent maintenance work carried out and why (is it to rectify a repeated or ongoing issue, for example)?
How old is the boiler and central heating system as a whole?
Has the property been re-wired / what kind of condition are the electrics in?
Is the roof sound? (I'm currently looking at a property with three large sections of flat roof and this would be a major consideration)
Is the water pressure good/bad/indifferent? And is it a hard water area?
Rough estimate of annual gas and elec costs
Any issues with damp, water ingress, woodworm, condensation, moisture etc and any works undertaken to remedy?
Any issues with neighbours? (it'd be unusual to find a vendor who'd had serious issues and was honest about them, but I think there's a legal aspects to non-disclosure on this point)??
Rights of way for neighbours or general public across any part of the land the house stands on?
Is the loft insulated?
I'm sure I can think of a few more!