As previously mentioned, not traditional baths can be a nightmare with kids, so if kids are on your agenda, have a good think. Also, if you are not going to stay in the house for a LONG time, consider resale. Parents look for traditional baths for young children and non-traditional bathrooms look good, but can be a real turnoff. If this is your forever, no-kid home, go for it. If not, perhaps reconsider. I am also wondering why you are looking to spend so much on a bathroom that you will not be using (apart from the bath)? Just be careful you haven't overspent/overcapitalised on a portion of the house that really only needs to be functional and modern. People might love the bathrooms on the block, or whatever, but they buy houses in their price-range with functional amenities. Just some food for thought. Good luck with the build.

why do you need the ensuite and what do you love about this property? based only on the floorplan i don't believe there's enough space to have an ensuite although, if this is a good house in a great area for a good price the best option would be to add an extension, subject to the usual costs and restrictions but, the ensuite or extension will sacrifice space from the existinhg house and even the example shown outside the house will only work if the side fence is at least 2m away btw your plans and measurements are deceptive because the bedroom next to the bathroom shown as 3.5m x 3.5m is really only about 3.5m x2.7m ... the attached copy of your plan shows some options for adding the smallest possible ensuite (shown as the rounded oblong at 2.5m x 1m) .. an extension allowing enough space to add a master bedroom with ensuite or repurpose existing rooms and add new living rooms with better connection to the garden could be an option but an extension is not cost effective just for a tiny ensuite

I think if you were willing to lose the back covered porch next to the bath, you could extend the bathroom and just have a walk way to those stairs. What concerns me about using the meals area, however, is how you would access the stairs to the cellar. That is something you need to figure out. Walk around your house, consider the options and walk the spaces to see how they might work for you. If you have trouble visualising it, you may need to measure it all out and draw up a plan of the space yourself. measure your furniture and cut little shapes to scale and move them around the plan to see how they fit. The bigger your plan, the easier it will be to figure it out. You need to think, too, about how you live in the spaces at the moment and what works for you as well as what doesn't. We lived with our kitchen for three years before settling on a layout we both agreed would work for us. We totally renovated our downstairs, changing the layout of the spaces and putting up walls to define spaces in what had basically been a walled in under house area. We discussed, changed and drew out the layout about 4 times over about 18 months, until we got the one that just felt right. We have lived with it for 18 months now and it is working very well, enhancing the way we live just as we wanted it to. My point is, don't rush to a decision. This is going to cost you a lot of money and you are going to have to live with the result for a number of years. Think it through carefully and figure out what will work for you and your family.

No-one seems to have brought up what , to me , seems like the second most logical suggestion ( admitttedly , without knowing the planning rules ) . The logical still seems to be to sell . Failing that , I'd look at extending the study , taking in the courtyard , alter the internal door ( suggestion - a single door on the 'right' side of the existing study doors area ) , add an ensuite ( relatively easy as the existing bathroom is just through the wall ) , and make that room your master bedroom with en-suite . Move the ranchslider , or add a roof to floor window , to get natural light into the new master , and possibly add a skylight or two above the dining room , as it will lose the ranchslider . Not perfect , but if you go up it will be costly , there are engineering issues , matching materials , new roof , all sorts of logistical problems . 'My' suggestion cuts down outdoor space , and may exceed the building to land-size ratios , but its so much easier building , engineering , roofing , plumbing and materials matching wise , gives you all or most of the space you are after , so IMO way more bang per buck . Having said that , only you know your priorities , budget and what you are happy to give up to gain .