Hi. If you have an existing drain via your shower, this can be converted to take care of a bath shower combination, even if you also need it to be a wet floor drain. A bath waste is normally a 40mm pipe, so if your existing pipe is a 32, you might need to do some conversion

Hi RE your relocation options, the plumbing is probably going to dictate what your design options really are. Apartment renovations are quite a bit different to normal reno works in that there are often a lot more restrictions as to what you can do. For example, in older buildings, the drain for the bath is often a smaller diameter pipe than the shower as it doesn't need the flow rate. This means that moving the shower to the bath results in long high pressure showers filling up the floor (so you definitely need a hob) because of poor drainage, particularly if you don't keep hair out of the drain. As the floor drain plumbing is often situated either within the slab or penetrates into the ceiling space below, it is not able to be changed without major works and cooperation of others. The water supply and the waste usually go back to a plumbing stack so your options also depend on the proximity to that. Many things can however be done, but the overall plan of the apartment needs to be looked at re stack/access to pipes/check pipe diameters. With a bit of creative re-working we have installed additional toilets and shown other residents some of the possibilities in the apartments we have done but every apartment is different. My tip would be to do some research within your complex as to what has been done by other owners and speak to them about the issues they had to overcome. If you don't know of any you could easily do a web search for your street address and you will see previous advertisements for apartments for sale along with (usually) pics. You could then approach them and ask how it went. It mightt save you some $$$ and time. Cheers

I'm not a fan of shower over bath either but agree sometimes for some people it's the best solution. The makeover is beautiful. Two things, just in my opinion. I always wish for a grab rail when using a shower over a bath, as I sometimes do in hotels. I felt that way even when younger and more agile. Surely there could be a way of installing something to hold onto when stepping in and out without it looking like a nursing home? I suppose in a bathroom such as that shown I would hold onto the towel rail. I've always wondered about vessel basins that slope inwards, is it a problem for cleaning behind them?

I think you have answered your own question in your comments. Unless for some Australian standard you need the overflow, I would just install the standard plug.