For storage, I used a mirrored lift up cupboard door above the sink area in my very small ensuite with some success. We put power points inside the cupboard too - it was a very good place to have them as the door lifts up & is out of the way. I also used some of the wall space to allow slightly deeper shelves, without the cupboard jutting so far into the room. The cistern was recessed into the wall cavity, (in our case below the window) & it worked well to save a little space in the room. Photos are not very good, but I hope you can get the idea.. It worked very well. The ensuite was 1mx2m. We use vertical towel rails. They're really good & very compact, but do make sure the electrician installs them up the right way. They work on the heat rising principal & do not work well upside down as ours were installed!Hope this is helpful. Good luck.

the proposed new bathroom looks like it would be at least 2m wide and 3.5m long depending on the size of all the fixtures but we need the measurements of the existing bathroom including all the walls and the size of the windows (width of windows and distance up from the floor) and what are the floor and walls made out of??

No-one seems to have brought up what , to me , seems like the second most logical suggestion ( admitttedly , without knowing the planning rules ) . The logical still seems to be to sell . Failing that , I'd look at extending the study , taking in the courtyard , alter the internal door ( suggestion - a single door on the 'right' side of the existing study doors area ) , add an ensuite ( relatively easy as the existing bathroom is just through the wall ) , and make that room your master bedroom with en-suite . Move the ranchslider , or add a roof to floor window , to get natural light into the new master , and possibly add a skylight or two above the dining room , as it will lose the ranchslider . Not perfect , but if you go up it will be costly , there are engineering issues , matching materials , new roof , all sorts of logistical problems . 'My' suggestion cuts down outdoor space , and may exceed the building to land-size ratios , but its so much easier building , engineering , roofing , plumbing and materials matching wise , gives you all or most of the space you are after , so IMO way more bang per buck . Having said that , only you know your priorities , budget and what you are happy to give up to gain .

@Kate yes ! okay, I was just looking into maybe a sliding door that we can leave open when the shower isn't in use and gives really easy access with a drain and slant away from the bath.. and leaving the back open (bath end) @dreamerJust worried about it looking squished i completely agree those photos you attached work well, i'm just worried about it looking cagey with glass butted up against the side of the bath (rather than the end as in those photos) and also restricting access to the bath