What about moving kitchen

With some furniture

And consider moving garage door to the verandah to avoid traipsing through study.

Personally I would not have rumpus upstairs. Keep noise away from sleep zone. If you don’t need downstairs bed for accessible living I would use that as rumpus or media room

Is this the original floor plan of the house? Is there any history online bit looks as though it may have gone through alterations.

The only extension has been the lounge at the back.

What about re configuration? Was the kitchen always in that spot? Originally a kitchenette upstairs? Door through study?

Option with bigger ensuite and plumbing toilet might be easier on outside wall next to existing toilet.

Yes a bigger ensuite was my thought exactly how you have it Kate. Just also crossed my mind of stealing the toilet and closing it off to make it even bigger. then the other bathroom losing the bathtub and making a separate door for a toilet + shower and vanity instead.

Yes a kitchenette was made upstairs for multigenerational living as they had older parents living at the home.

The study they have just put a table there and called it a study for selling purposes i think. No door or any set up like a proper study.

I think the toilet and shower need to be in separate rooms for the kids to share.

some dimensions are inconsistent or unreadable so suggestions are based on estimates with minimal structural changes but, depending on views and local climates, some windows on east and west could be reduced or removed to make the house more comfortable

yes minimal structural changes would be preferred. Thanks for all the valuable suggestions and comments. Taking them all aboard and appreciate the advice.

Get some quotes on the options you like. You mentioned moving various rooms around which add costs. Removing wall and leaving other rooms in place may give better value. So don’t discount it as an option. But there are lots of variables we don’t know such as the need to renovate rooms etc.

To give context, it us brick veneer and the whole house is very old and has been existing decor for 40 years. So whilst having a freshen up, figured might change a few of the quirky layouts, and remove some walls if budget allows.

Well hopefully this has given you some ideas to play with.

How many bedrooms do you need upstairs ?