Hi, We are looking to purchase a property in Brisbane. It is a queenslander that has been entirely renovated. The existing owner bought the property back in 2012 and the downstairs were classified as "multi-purpose" rooms which mean they are not of legal height. The house has been entirely re-layout since they bought it and they now have a living area, a bathroom and a bedroom built on the ground floor. The house hasn't been raised but upon inspection it looks like the ceiling height are legal (i.e. 2.4m). We have talked to the agent regarding this issue and we were told when the current owner bought the place there is a 40cm gap between the downstairs ceiling and upstairs floor board. They have since put in a new ceiling for the entire downstairs area and it is now legal height. My concerns are how do you make sure all the renovation works they have done are certified? Is there a way to look this up? The house is in Brisbane. Thanks very much for your help.