I am really hoping someone can help me? We are about to put in an offer on a property that is only 12 months old. There is no rain water tank but I thought that after 2006 all new homes must have one installed??? This is an investment property & we will be renting it out but not sure whether we would be responsible for putting in a tank???? A family member installed a tank on their home & the cost of the slimline tanks & plumbing & pump etc was over $3000 so not a cheap exercise! Any information or advice gratefully received!