Photograph the whole wall and the affected area if you can. Note when the marks first appeared and whether they have changed. Tell us about the wall finish, room use, nearby plumbing and any recent water damage. Previous inspection notes are useful even if the recommendation was not carried out. The aim is to understand the history, not judge earlier decisions.
For landlords and property managers, confirm who is arranging access and who can approve any work. If you need written findings for a management record, explain that purpose before booking. Pricing depends on the areas included, condition, access and investigation needed. We discuss those details so the recommendation is about the wall in front of us, rather than a standard price for any room.