Once you have found a property to buy, you will most likely need to instruct a chartered surveyor who will check the structural condition of the building on your behalf.
Your mortgage provider will conduct its own valuation of the property, but most people want the reassurance of their own dedicated structural survey on the property they wish to buy. Before you choose a surveyor, make sure you know which kind of survey you need and what you're expecting the surveyor to produce. This is likely to depend on what kind of home you're buying.