Looks fab Interior Design By Jo. Like you said, small changes can make a huge difference!

Do you have any original floor plan you can post, will this toilet be the only one. If there's enough space where the toilet comes off the hallway you could have a door opening off the hall and a hand basin for a powder room setup and then another into the WC for a good sound barrier. What space are you you considering

Don't try to bypass the approvals process as it will come back to bite you on the bum when it comes to selling your home. Nobody wants to buy real esate that has illegal construction so it will actually devlaue your home. The requirements for approvals vary from state to state, and sometimes even council to council. However with the type of boundary construction, and the length of it will probably require DA approval in most areas of Australia. Best to have a friendly, informal chat with one of the planners at council who should be able to advise you in the requirements for your locality. Or enage a local architect/designer who is familiar with terrace house renovations, who will handle the design, documentation and permit applications for you. The photo supplied by Siriuskey with the glazed roof over the kitchen was created by a design professional. Best of luck, Dr Retro of Dr Retro House Calls

Your powder room is a bit too cosy for an inward opening door. I would steal a bit of space from your bathroom. You need to be precise about your toilet pan measurements - the toilet symbol shown by the draftsperson may not be an accurate representation of the size of the toilet pan that is selected. In these types of situations, millimetres are crucial. Best of luck and remember that God is in the details, and never assume that others have checked the details. Dr Retro of Dr Retro House Calls and Dr Retro Virtual Visits via Zoom