Hi ysteb1 I found a tile that looks like a light beach style hardwood from National Tiles. They are long (1200mm) and narrow but I think the look will be nice. They are suitable for a bathroom so going to try them out.

Vessel basins have a lot more styles and sizes to choose from which can help with providing more/less bench space depending on your preference. They also wont take up as much space in the vanity. You may need to do a little more cleaning than if you went a standard integrated style.

I would prefer to keep the WC separate to the Bathroom as you have 3-4 kids? who will get bigger very quickly, having a powder room downstairs won't help with the morning rush to school., But it's your house so I have added a pocket door between the WC and Bathroom. I have also taken that small robe space for an extra vanity in the WC/Powder room. No width dimesion given for the WC The ensuite could use that extra entrance space as a sit down makeup and hair bench for your wife.

@wuff, Thank you so much, and congratulation for your renovation, I wish you will enjoy it for so many years to come. Yes, I agree living into a granny flat next to my son was my husband wish before he passed away. It is good to be close to family. Also I love the suburb which I have been lived in for 22 years. My Daughter and her family is living close by too. Most of my close friends are living around and we always gather for a brunch, or lunch or watch movies. The good thing is most of my friends pick me up and don't let me drive most of the time when we go out. Thank you again