We've just had an offer accepted on a house which was built around 8 years ago by a builder for him and his wife. Given it was for him, the quality is excellent and well maintained. We're very fortunately a cash purchase so no survey required for a mortgage, but should we have one anyway? There is also a massive barn on the land - would that need a separate survey given it's more agricultural or would it all be done under the same one? Any input gratefully received.