In the process of buying a house with dp and survey has thrown up a couple of matters affecting value. Most were issues we were aware of, single thickness brick porch, flat roof in part of the property etc... However, it has also thrown up a query over distortion of the solid floor to the ground floor of the building and recommends we obtain a specialist report prior to completion. Who do we ask to do this and what sort of costs are likely to be associated with obtaining such a report?!