Hi there Victoria, Just trying to add a few more ideas, with a separate Pantry/Landry cupboard (this can easily be ducted and when the doors are closed very quite). Fridge and appliances all along the wall, the island can be what ever size you would prefer. It would also be nice to have a computer desk next to the kitchen by the window. I would also prefer the living area off the sliding doors to the alfresco area Bedroom 4 could have full height sliding doors coming together at the corner this can be close off or left open for times when extra space is needed for the family. And built in Wardrobes in the master would work best, just have something that blends in and looks special.

For vanity top, chose either a laminate, or engineered stone such as quartz eg: caesarstone, Essastone or silestone.You can get some wonderful laminate colours now, at very budget conscious prices. Look at Laminex and Polytec brands. Acrylic bench tops, in my opinion are dated. Have you looked at the semi inset basins. Basins really come back to personal preference for shape, height. If you have a basin on top of bench top, then install taps in the wall. If you choose inset or semi inset basin then taps installed in basin. Shower must be no smaller than 900 x 900mm. Freestanding bath would be a waste of space in your bathroom. I have attached a photo of a semi inset basin, (caroma) on a laminate bench top (Polytec)

We had a very similar arrangement as OKLouise's first design, and it worked a treat when the kids were little. 3 kids, so one could be in the toilet, one could be cleaning his teeth, and one could be in the bath. The vanity being seen from the living area was not a problem - made me keep it tidy, and it was big enough to have a plant, etc to make it pretty. When the guys were teenagers, they would have liked a vanity in the bathroom to give them privacy. Then we understood why the architect wanted to have a cavity slider into the wet area... Cavity sliders are great for giving extra space, but not as good at locking as a swinging door.

One of my kids is still a bath taker and the full time bath years are still fresh in my mind (9&11yo). If I was doing the bathroom again I would go with a back to the wall rather than an inset. Toys can hang in a drainage bag. You can’t leave stuff on the hob, the kids are either too young to have access to them or knock them into the bath. And a full acrylic bath rather than grout and tiles is easier to clean. Don’t do full freestanding unless you have the space. But you are building the house for you so have what you want.