minor variation to dimensions allow for wider vanities, more space in the toilet and if you have the choice, the toilet reversed is more private (add sound insulation, ventilation for the toilet and a solar skylight for the vanity area will make the rooms more pleasant to be in and 60cm deep base cabinets have more counter space for the girls to spread out, storage under for towels and linen with matching mirror doored medicine cabinet for everything else

Thanks for the measurements, there were a few missing that would have made it easier to be more precise, But I'am making suggestions on what I think might fit within the existing floor plan which you are trying to do. the only small extension is to fit the laundry into a shared family bathroom. As there is already a shower and toilet in the current laundry I think it would be wrong to move them as they are close to your new alfresco area for the family to have easy access when you have your get togethers. To try and keep the girls bedrooms a good size and together with the other two bedrooms I suggest working with the fireplace and making the current Bathroom and ensuite but with the ability to share the toilet with the girls during the night. I have added my beloved barn doors to close off the kitchen from the bedrooms and also to be able to leave open during the day for extra light., the planned deck with roof over will make the dining/study/kitchen darker so you might need to consider a sky light. Anyway just a few different ideas trying to work with and around special features cheers

Hi Siriuskey. Bifolds work with your layout, small laundry won’t work with sliding doors unless you can take it the whole length of room. It was touch and go fitting mine in with existing window and door. Can’t tell you how many times I measured depth of laundry. We had to pull of trim from side of window and trim window ledge back flush to side of new timber door frame. So glad I persisted and could get full height doors. Bifolds would not have worked at all for me with door and window and extra width. It wasn’t the only thing I shoehorned in. You may notice the toilet isn’t set back in line with shower, that was so I could squeeze in a dog legged entry into the old laundry of a slightly extended hall, laundry has become my study. Previously laundry had external access and access through the bathroom.

the narrowest walking space would be about 60cms (and there won't be a lot of traffic in the space and with 3800 (not 3400) the ens doorway can be pushed towards the front of the house, not centred and makes more standing room in front of the shower and easier access from the bedroom to the ens but also depends on the distance from the new wall to the side of the bay opening and that was probably centred when the house was built and before the wardrobe was installed so you need to carefully measure the room again... we now have three different widths for the room and the hall is shown as metres wide!!...is the master bedroom 3400 or 3800 or 4460 wide (ignoring the bay window) and what is the length of the whole room (ignoring the wardrobe) and what is the depth of the wardrobe from the outside and also measure from the outside of the architrave around the bedroom door to the front of the wardrobe ..could you gain some space by moving the bedroom door closer to the wardrobe and/or hinging the door to open towards the wardrobe to feel less cramped? ...we can make lots of suggestions but need to start with precise information about what you already have and based on new information and the size of an average king sized bed and the wider room my suggestion would be to place the bed in the centre of the room, lined up with the centre of the bay window and then measure how much space is available on either side for the ens and for wardrobe and bedroom door and you'll probably find that even if the bedroom door is moved there would probably be about 60-70cms between the bed and the new wall and minimal space between the bed and the door on the other side so try losing big bedside tables and use hanging lamps and mismatched side table or shelves ( a cut down stool makes a tiny side table) and keep in mind that, unless you remove the whole chimney (big job but will supply a huge number of bricks if you need some paving) the thickness of the brick walls will decide how much space is available in the chimney alcove for the vanity so measure inside the chimney not outside wall spaces but, despite limitations imo the ens is well worth the effort, cost for the improved resale value and quality of family life.. but, why not move the bed and add something to create a barrier to represent the proposed ens wall and see how it feels as something like this could work but depends on accurate measurements