I'm guessing it's meant to be a robe recess. I would just call a wardrobe installer and get a quote for built in storage, eg. Drawers, hanging, TV space, shelves, whatever. They will help with your design and you can never have too much storage. It's only a quote, free ideas and you may be pleasantly surprised with the price.

I really like these [bed side tables[(https://www.houzz.com.au/photos/north-seminary-contemporary-chicago-phvw-vp~13970763) which are bespoke although too large for my room. Anything similar, but not as wide, in Australia..ideally Melbourne?

retain as much of the existing walls as possible and for stage 1 suggest stealing enough space from the office to include the window in a combined laundry pantry, keeping the separate front lounge and entry foyer and rearranging the kitchen with meals area and keep the original entry with twin cavity sliding doors and space for wall cabinets keeps some privacy for the entry stage 2 family bathroom, front bedroom and halls and remove storage from small bedrooms to allow for temporary entry doors stage 3 new bed 3, hallway with storage and master suite with extended hip roof stage 4 new laundry, family dining room, widen opning between kitchen and extension improved pantry, extra cabinets and study nook for old dining area and skillion roof then outdoor areas and holiday at home!!

@siriuskey - thanks for the images, can see it definitely works nicely with some of those, esp that first one! unfortunately being an original californian bungalow, the front windows aren't very big so im hesitant to cover them; they are similar in width but not quite as tall as the windows in that middle picture. our bedhead, when i am standing comes up to about chin level (im 165cm) - i don't think the picture i posted does it justice as you can't see the bed legs haha...so i think it would end up looking like the middle picture :( @girlguides - i like your suggestion for shuffling around the ensuite layout - it does make sense to have the door infront of the vanity. we will try to get a bit of extra length on the ensuite (all based on council town planning restrictions due to proximity to our neighbours) and that should allow for the entrance to sit comfortably in the corner of that wall with some nice space around the vanity...will still be tight to fit the bed, side tables and door tho!!! side tables are 65cm each, and bed is approx 190cm... and width of the room is 4m on each side....so will potentially be a skinny 750cm sliding door to the ensuite...which of course is better than a skinny entrance door to the bedroom tho!!