Dear All, We have owned a two bedroom unit on the Northern Beaches in Sydney for 10 years. It is a raised ground floor flat with Windows on three sides. It is north facing so gets good amounts of sun in all rooms throughout the year. For the first six or seven years there was no problem with mould in the unit at all but since the current tenants moved in about 3 years ago a mould problem has started.Two inspections ago some mould was noted in the bathroom and we told the agent to make sure the tenant cleaned it up. In the inspection after that, the report showed all,was fine. However in the current inspection there is mould not only in the bathroom but in the two bedrooms as well. We got the building manager to send someone in to check there was no water leakage from the unit above or outside walls and it came back clean. Our managing agent then called in a place to assess the mould and they came back saying we needed to spend $3,000 to get rid of the mould and prevent its return. I have two questions 1) who is responsible for fixing the mould? My opinion is the tenants have contributed in some way because there was no problem before they moved in 2) what responsibility does our managing agent have? Evidently this mould has been a fairly major issue for about 18 months but was not reported as such to us. Any opinions much appreciated.