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 :)

I also like oklouise plan. good insulation is the key. In your original posted plan, Maybe change where the beds are positioned in the room. I think there is some bad feng shui if your head is backing onto a toilet. Apart from the noise factor, every time the toilet is flushed.

Thank you for your feedback. I agree with your comment on the main bathroom. That layout is from the original 1984 house build, so it's something I'd like to address, but I don't quite have a vision of how to get around that yet. The second living area you mention was a discussion point during design, but we felt gaining the extra bedroom, robe and bathroom had higher importance. Our thought process was that bedroom 3 could always be opened up off the main entrance and converted to a small second t'v room if we needed it (3.4m x 3.1m). We also converted a 6m x 6m garage to a living area with tiled floor, insulated walls, air con, couch and t.v etc, so having that space swayed the decision to go with an extra bedroom and bathroom.