I see what you mean, 2100x2100 is not huge, but its certainly workable, is this a reno and are you working within an existing structure and if so existing plumbing as well?... I still think you can have a better layout to make better use of the space, looks like you're trying to cram everything in one corner of the room with an entire wall (to the left) dedicated to towel rails?... I see you've noted bedroom and hallway at the bottom, does that mean the bedroom is only linked to part of the ensuite and if so how much of the ensuite actually connects? presumably where you'll have the cavity sliding door... my suggestion to find a way to enclose the shower a little is not only to limit water splash but also to create some privacy from the toilet in the event that both are being used at the same time, could be a bit awkward? I was thinking maybe a nib wall with glass panel on top... I would actually also consider doing a nib wall where the vanity is and have the floating vanity from the left wall to the nib wall as that little gap you've got at the moment between the vanity and the shower screen would be difficult/annoying to clean... incidentally, the 540 depth of the wall hung toilet, does that include the cistern or will that be hidden behind the ensuite wall?

Just a thought, have you checked your lovely flooring will persist under new cabinets or more importantly the gap created by the island bench. Possibly put a simple narrow breakfast bar (with power point of course) across a couple of the window sections, lovely to sit and look out of the window and preserve the look and the light. Then you would save some depth into the living space, as the current breakfast bar is quite large and deep.

Your renovations are well underway, so after seeing the small floor plan and that the vanity is on an internal wall and you apparently still want the Shaving Cabinet. Having cavity brick walls I would get your brickie to remove a section of the brick wall so that the shaving cabinet can be recessed back into the cavity, this will overcome any concerns you have about bumping your head, this opening can then be patched along with other walls. I would take all of your photos and measurements to someone like Reece to pick a hand basin to fit,, I would also keep in mind that if say the width of the vanity is around 900 the shaving cabinet would match that width and you would end up with say 2 x 450 mirrored doors, which puts the mirror join in the middle and in your face when using the vanity. cheers

It's about balance, between function and aesthetics. Fenestration configuration is often poorly implemented and it can be a "make or break" factor in the project outcome if you're not careful, so good to see that you're thinking about this You want to take cues from the original building style, but you can also nudge it into more contemporary territory successfully if you achieve the right balance. You can always manage/control privacy and sunlight with window furnishings. The most important things are (a) that the window proportions are balanced in the facade, and (b) they are serving the functionality of ventilation & light. On a front facade I'd never design two separate windows side by side that are slightly different, one fixed and one awning - it will look off balance. You'd be better off with two awnings, or one large window with sections of both awning and fixed, say two smaller outside awning/openable with a centralised fixed section. If you do some research in the era/style of the existing home, you'll find that the front facade windows divisions within the one window frame typically were slightly varied. Your picture has them all even that makes it look more standardised.