I am considering converting an area under a Queenslander to a bathroom. To do this I will need to either build up the floor somehow probably using bearers etc to get above the concrete hob (see pic) & also provide a means to conceal pipe/obtain fall to sewer outside , or alternative is to cut slab & dig to outside the building, which would only be about 600mm at most. That is the best method as I wouldnt have a step down into the garage area as I would if building up the floor. There is already a toilet in this area but it is completely exposed downstairs.
I would then install a wall & door internal & window to external.
I would also need to sheet the external slat walls. My question is, what process do I have to go through as I am not a registered owner/builder, I am just an investor from NSW with a property in Qld.
The problem is this is a remote town & getting tradesmen is a nightmare, not to mention incredibly expensive. I would like to do this properly & while I believe I could carry out the work well myself, I am not a builder or a plumber & even if I were, I wouldnt be registered as such in Qld.
I guess there is a pretty obvious answer but humour me anyway, do I need a licensed builder/plumber etc to do this work legally?
Also, can someone tell me the legal height to be able to install bedrooms etc under a Queenslander, & where it is measured to i.e slab to bearer?