Or Make them both long and skinny. Long and Skinny is sometimes easier for an ensuite then a square room because you can have toilet, vanity and shower in a line with shower taking up all the end wall . it also works for WIR as you don't have as many corners to work around if you have joinery on 1 long wall and end wall.

reluctant to lose the convenience of outside access to a toilet my suggestion sacrifices a little space off the lounge and bedroom to keep the extra toilet and use the original laundry space for a bigger ensuite with separate toilet and double vanities, the new extension makes a more spacious wiw with only standard doorway openings to the new rooms but the ideal outside door for the laundry will depend on the location of the drying area and you may decide that a western door or no outside door (and walk through the verandah?) could both add more counter space to the laundry and, much as i like the gable roof for the extension, it would be interesting to obtain a comparative quote for a simple skillion roof (and raked ceilings for the new laundry and wiw) that may save a lot of extra roof structure that doesn't add anything to the inside of the new rooms or streetscape and could be much cheaper..

Thanks Margot, north is to the right of the plan above, but the master and theatre (east) face natural bushland, and the master is not to the right of the design due to cars entering on each street coming towards that corner (street to front and right). Being a corner block we wanted to keep as much privacy for the master if possibly. We plan on a full fence to enclose the back bedrooms and following that a white picket fence or other permeable fence around to the front, with trees planned on the north and east sides. It can get quite hot in summer here so not hugely worried about heat and sunshine etc. Also wanted the master to face the natural bushland. The garage could go on the boundary, though adds more cost and there is a small power dome so the driveway would need to curve around that. We have taken on board feedback for the bedrooms and powder at the back. Will have a play around and see what we can shift to make the bedrooms bigger etc. Thanks so much for the help :)

there's not enough space to have any open shower the best option is the sliding glass doors but a shallow bench with semi recessed handbasin and mirror doored wall cabinets would feel more spacious than a vanity