Consider the sightline from outside the laundry room. With the second option if both doors are left option do you see the toilet from a living area? There is not enough information on the plan to see what room is adjacent to the laundry. If you do decide to go with option 2 ensure that you use a single switched exhaust fan/light unit in the ceiling, so that when somebody visits the loo and turns on the light then the exhaust fan turns on while the light is on. One of my clients had a similar internal room for a powder room and I designed an internal high light window to the powder room that borrowed some natural light from the adjacent bathroom. A small window with a sill at 1800mm above the floor level on the wall behind the toilet cistern would "borrow" some natural light from the laundry and still provide adequate privacy for option 2. Best of luck, Dr Retro of Dr Retro House Calls

Look at the range of timber bench tops at Bunnings. Nothing better than a timber look, with real timber. https://www.bunnings.com.au/our-range/kitchen/benchtops/timber

Plan c is better using the widest end of the room to locate washer. Size your sink as you may need a 600 deep cabinet for it. Washers, including door which now seem to all protrude 50 mm, come out to 670 once u allow for hose space at back.

Your builder is with it in bathroom design, using the new standards to give you with a "designer bathroom " Only a 100mm wide Linear Grate However Should you propose a " walk in shower" the linear grate, heel style ONL, tile inset grates are very problematic " should be located at the "front of the shower." If your shower has a door, a Heel style linear grate, rear wall /floor corner is better