I live in an ex local authority end terrace house. I am unsure if I have an underground leak from a water pipe? Scottish Water tell me they can't help as there is no loss of water pressure and it's beyond the pavement. The tarmac at both corners are often damp, the front corner looks like the tarmac has been replaced at some point in the past. There are no damp patches inside the house although items in a bedside cabinet in the corner of my front North facing bedroom had mould on them. There is no sign of mould anywhere else in the house. I can smell damp in the corner of my bedroom, in my front hall and inside my kitchen corner cupboard. I checked under my kitchen cupboard and there is no sign of damp. This is also a South facing wall. I've been using disposable dehumidifiers for months now and not sure what road to go down. I have gutters maintained but wonder if this could be the problem or something more serious? Any advice is appreciated before going down the wrong route.