1500 & 1800 is a bog standard (generic) bath size. What's the size of the bathroom, 1450 x ? and where is door and window, existing layout.... Most of my clients still prefer a bath in their houses. Even with a shower screen over bath. A renovation of existing bathroom with bath/shr/toilet/vanity in same positions may be all you need.

back to Ikea for some wall hung bookshelves ALGOT style has a strap attached on the wall allowing for multiple configurations of shelves and can be removed if/when needs change and/or a tall bookcase on the wall behind the cat..Billy has a 40cm or 80cm wide x 2m tall bookshelf (with or without glass doors) that are only 30cms deep..good luck to your children with their studies, they're lucky to have a parent so interested in their comfort

to access the power point through a backboard cut a matching hole in the backboard to access the power point and add a small extension cord to have the power in a more convenient location but storage depends on what you need to store but try the PAX wardrobe (1500 wide x 2100 high) with extra shelves plus a freestanding chest of drawers eg Malm 80 wide to leave a small gap at the window wall for the blinds and use wall hung open shelves and don't forget to secure the wardrobe and drawers to the wall...if you prefer the chest of drawers to be the same depth as the wardrobe you could add an extra counter on top of the drawers (Ikea and Bunnings sell custom cut counters in various colours but consider having the chest of drawers and/or the wall shelves in different colour for constrast and matching knobs or handles to doors and drawers

Love the blue feature tile. Beautifully done. And always love a pop of wallpaper in a powder room, it’s such a good space to go a little wild.