there's generous space for all you require...the measurements show suggested allowed space for sizes of standard off the shelf freestanding bath, double vanity with matching in wall mirror doored medicine cabinet, toilet and 800mm deep double shower ...with plenty of room for a drop in bath in a tiled surround if preferred and space for a chair or small table by the bath, should be great!

only 870mm available for the depth of the shower because of position of door but at least 1200mm or more for width

Interesting project! It looks fun. Here are a few quick thoughts I had-

Usually, if you have a tight bathroom, you would replace a hinged door with a sliding door which would give you more space.

I would position the bathroom in the front of the room and the laundry at the back. Laundry's functionally tend to be messy places and you don't want to walk through that to get to the bathroom.

If you have a small family, I would suggest if you do place the laundry on the back wall, place it behind pivot or pocket doors and then utilise the space that is left for the bathroom.

Good luck!

Thanks for the feed back, we are building a new laundry, and have a very large ensuit with bath tub. We just thinking if it fits, a bath for kids in main would be good.

Based on the plans you provided I would go with number 2 (top row - right) with everything on the right hand side, so you walk in the door and the room looks spacious and you are not looking directly at a toilet from your hallway. All the plumbing runs along one wall and that is always the cheapest option and you can have a heated towel rail or similar running along the wall next to the entry. If it is possible I would rehang the door so it opens to the right not the left and then I would swap the toilet and basin so the toilet is tucked behind the door (for a little more privacy) and the vanities will be next to the shower. Good Luck.