i have a problem with the awkward location of stairs that wastes the sunroom, makes the rumpus room difficult to furnish and the front door has a view of the toilet ...beginning with central stairs and potentially modifying doorways to allow for the stairs without having to walk across the rumpus or upstairs living room attempts to avoid the big wide hallways affect without useful locations for furniture ..the rumpus room now has space for comfortable furnishing and private access to a full bathroom and good sized laundry...using the old sunroom for a compartmented bathroom retains the original walls and windows and includes space for a bathtub and shower with big views.. we should always include real scale sized furniture to establish the best walking paths across rooms and my suggestions also retain the size of the original kitchen to keep more of the original walls and ceilings and retains the proportion of the bay window and allows space for an alternate access to bed 3 (preferable the linen cupboard would remain in this location) and consider avoiding the enclosed pantry (would the door ever be closed?) in favour of a more open space for better light and ventilation and maybe a herb garden window box in the bay window with external blinds to exclude western sun.. there's a fridge closer to the outdoors, stacked wo and MW to define the pantry and only a small sink in the island for more useful set down space for shopping and serving meals

could suggest that you make the extension a separate building connecting via glass or other enclosed walk ways ie: one extending from the passage into the family and another between the kitchen and pantry they only have to be deep enough to stop the gutter from the original house touching the new house which could have amazing sloping roofs and high ceilings. I also notice that I haven't marked a laundry, that shouldn't be too difficult. You could consider extending the carport along the boundary which could include a laundry, WC within a pool house for the NEW Pool. Many ideas as many ways to do things cheers PS: do you want to share where the house is, must be one of the wine country areas in , guessing SA,VIC,Hunter Valley

Yeedalong, if you are planning to do the twin japanese style bathrooms, my idea for a second toilet to save on mess and money was to use the following system, they are more expensive but should be more cost effective. I have used this system when staying in a newly restored hotel which was very impressive. You are an artist do you have likewise guests come for workshops etc. https://www.qualitybath.com/discover/post/2758/how-do-saniflo-up-flush-toilets-work?cf_chl_jschl_tk=829adadc38e7871ef5ea3f40d2263ce9590b9723-1584241557-0-AaflrfqRF0EsynbeG7BfUpQTLpTsP9979z3m5I1o9PJtGGD7llERhHsLF7IO5GHUT46QHGo8eWMB9dLlnHpVeu1xGiyqgmC3GLQQfnY7FhGg4Ihwi8L0eRsmGrxROuLzQKC6xuQEYEhVS7u-pxfnEbuq49ceG7NzpVig6I_H5wE3qQuoAzGcro-u7lYyu1OPih1IX2yOhlY4s57LNRhYNL8iH7bJVLdp31Q2WIgQ_STomCtxGtdK_llfflOdfauYpnzNGaH2xpJNt8gb0yOphB_VrJJS6mjIkN5hJIH2B2OVEUTrasCFiJU6wfcNa5R545BqYMbzsRlVt706x4H4VdQGu7vITBMsxxuCkxwjoHFqkR_VKKXXY5jrE_n5Bo4hj29DQn0N-9XUjJ9htfOpfSg

I assume the rest of the house is a similar style , and mainly white and off-white walls ? The copper pipe up the brick I would get your plumber to change to polished UNPAINTED copper , and make it a feature , especially if you want to keep the shower doors . I'd change the window sill to a stained darker wooden one , maybe even 25-30mm thick , depending on whether it goes under the window -- a lighter brick with the darker wood and polished copper would look different but in a good way . The toilet and cistern would even suit . BUT the floor tiles have to go -- I'd go a rougher matt charcoal . The shower door I'd keep and polish , but get rid of the extremely dated glass ( yes , I know its period , but . . . . . . ) and go clear , or flat opaque . Some of the tiles in the shower look okay , but I'd use it as a chance to strip the tiles , inspect the waterproofing behind it , change to a mixer , and re-tile , If you think you can 'get away' with just doing that wall ( bit hard to tell from the pics ) go for it -- re-use some tiles maybe , or redo in a very similar style . There doesn't appear to be a wash basin -- you can get some quite nice slim ones , with matching dark wooden cabinets . With copper taps, or a copper mixer ? I assume it is possible to get a copper toilet roll holder too -- stick to that theme , especially if you want to keep the shower doors . There may be a basin outside that room of course , but I can't see one ? I'd go for way more modern squarer skirting , maybe in a dark charcoal stain to tie in with the tiles , window sill and wash basin cabinet if you need one . Copper light shades are trendy , and tie in with the rest of the fittings , but also , for example , 4 lower power downlights as an alternative , would also be a sensible update . There's then only a couple of part walls to do , and I'd probably stick with white or off-white , unless you have another room in a different colour theme that you want to 'reference' .