Can you post a floorplan and pictures of house and Block, congratulations

The first image is the actual floor plan. The second image is what we have created in what we would like to do.

It’s a Queenslander style house at the back. We can’t build to the side, and prefer to build up to capture the beautiful landscape at the back.

where would you place the stairs both upstairs and down??...it looks like the house is on a steep block and you might find that it could be cheaper to raise the whole house and build new living areas underneath and convert the whole existing house to upstairs bedrooms as you would probably need to rebuild the whole roof and use the equivalent of a small bedroom both upstairs and down to add stairs and that will also impact the space left over in all downstairs rooms...can you post a site plan showing the house on the block with distances from the house to all four boundaries, direction of north and any views and some photos would help ..

Assuming you are enclosing the external stairs to access second storey? All the plumbing for new bathroom would be above the dining/family room. Every flush of the toilet or shower drain noise will be heard by people sitting in the room below. Where would your plumbing pipes connect into existing waste pipes? Might be better to position new bathroom over existing bathroom.

Can you post an aerial pic of roof

If your budget doesn't stretch to what you were thinking, this is a basic idea, you would need to add the missing dimensions for a 2D floorplan. The laundry could be included within kitchen space.

Depending on bathroom space the laundry could possibly be included in that space dimensions needed cheers

Hope this is helpful.
The plan is to extend the existing outside stairs to go up as well. We will enclose this whole area.
We like the idea of having the master bedroom and ensuite on the top level to capture the parkland that backs onto the property.
Oklouise, are you saying it might be cheaper to lift the whole house and expand underneath than go up?

renovating is always much more expensive than ever expected but best to improve the value and live ability of the house and just adding the upstairs master suite would end up with a house without much more than you already have with a kitchen that looks like it also needs updating and space lost to stairs both upstairs and down as extending and enclosing the outside stairs would need a two story addition of an extra 20 sqm and that looks too close to the side boundary to be legal and other HOUZZERS may be able to suggest some alternatives but it would be interesting to check with local council to find out what's possible and then work back from there but this is one example of how 36sqm could fit upstairs and shows how much space is needed for stairs both up and down and then space for a new kitchen would need to be found but some of the dimensions in your original plans are inconsistent so you will also need to confirm the measurements of all rooms

OKL floorplan is a much better solution, instead of spending money on a 2 story extension to accommodate stairs it' would be better to use that money on an internal staircase and master suite. I also noticed that you have moved the kitchen to the front of your plan when you say that the view is at the rear?, The Front Door is shown at the front of the house, is that because of your stair position. As per OKL,, dimensions need to be checked and added

Sorry, after looking back at your floorplan it doesn't show those changes that I mentioned above

Another idea moving the stairs towards the front of the house,and as per my rough sketch.

Thank you for all the ideas. Really appreciate them.
There are a few options there. Lifting the house and extending the room under the deck is an idea that we are now really interested in.
The house itself as you can see is small, hence why we want to build the master ensuite above or even below. Depending which one will be less costly.
I have attached the current floor plan, and the floor plan to want we want to do with the kitchen as it’s important that we have a spacious kitchen. We want to take the laundry out ( was thinking off putting it downstairs) and making that the front entrance. More centred. Working with this, interesting to see where we can put an internal staircase…

This is it.