Get your surveyor before the contracts are signed. Friends of mine where buying a house, not cheap at all, and they got the report before exchanging contracts. The surveyor adviced them not to go ahead unless they were prepared to spend a lot of money in the near future trying to fix a "few" things, like roof, flooring in the kitchen, etc etc. I am looking into buying a house at the moment, and before paying any deposit (usually 10% of the property) I would get a surveyor to look into the house. We have actually put an offer and just got back the report, where it states anything that might not be in accordance with the building regulations/etc..As someone said before, it gives you some room for price negotiation. Once you sign the contract if the report is not positive, there is nothing to do