
A lot depends on if it is a full structural survey, or just a survey for valuation. the former will be much more in depth, and more expensive, and will go inot the conditon of all parts of the porperty, plumbing, electrics, roof, damp, etc, etc. If they miss something, you have a legal comeback on them if you stand to lose money. However a valuation (often undertaken on behalf of a mortgage lender) simply looks at the basics, often does not find underlying (and costly) problems such as faulty wiring, roof problems etc. It is merely to assure the lender (and the buyer) that the amount of the loan/mortgage will be safe on the resale of the property. This is a great oversimplification, of course, but gives the basics.
bye
Gwen