That's quite a large house for 4 people, if you ask me... (even including grandparents in the future)
6 bedrooms and 6 bathrooms is A LOT

Thanks for the answers VK1978. My answers as follows:
1. 6 bedrooms - too many?
Yes, 5 is plenty, better to have larger…

I really like what oklouise has done downstairs and I would make one change to to it, keeping the hallyway at it’s original width of 1340mm ( I like wide…

And with windows added…

that looks excellent although is much bigger than original with the extra bedroom space added above the garage