how do you plan to use bedrooms 3 and 4, can you post a plan for the new upstairs and why are the stairs in that location?

When is and en-suite not and en-suite?

Dimensions would help.

Dimensions of rooms and location of plumbing services in kitchen would help.

You say that no walls are load bearing and can be removed. Then how is your second storey going to supported?

Thanks all, bed 3 and 4 are kids rooms. 

The stairs are where our current walk in robe is (hence the master bed "bed 2" will become a sitting room when the new master bed is built upstairs). Realistically the only place to put any stairs.

The builder is aware we are going to be renovating the kitchen after the upstairs build so are doing it in a way that we can add/remove the walls downstairs down the track.

I'll upload a pic to show stove (currently gas) and sink placement.

I don't have dimensions but the size is proportionate (see the size of the doors)

Maybe something like this. Reduce the sliding door near bedrooms to a hinged door. Install wall of linen cupboards facing bedroom side, since it appears you have minimal storage cupboards. The other side of linen becomes a hutch pantry with bench, and drawers under bench. Remove kitchen lounge wall, and Install a decent island looking across lounge to front of home. Replace dining window with sliding doors to outside. Proportionately using width of door. Your lounge including entry is 6970mm x 5740mm in to dining.

Some examples of my thoughts for the pantry area that I mentioned in my post. Under bench drawers would be ergonomically better.

Thanks Dreamer, I really appreciate the time you have spent and I think this is the best design idea I've seen.

I could potentially stick the washing machine around where the linen cupboard is so that the kids bathroom doesn't double up as a laundry.

Assuming the stove and sink will stay in the same place? 

I would also pull the kitchen back so it's in line with the door to the "ensuite" giving the lounge a bit more room - thoughts?

@dreamer, where would you suggest the fridge go?

By using the door size, I estimate that the current width between kitchen external wall and internal wall is approximately 2800mm
With my basic sketch, I would place the fridge on the same wall as the pantry.

my suggestions includes moving the sliding glass doors into the dining room, has a small walk in pantry and open scullery to avoid blocking the new window, keeps the separate entry foyer wall (to help support upstairs) adds a vanity to the powder room, removes the extra shower to make the laundry more functional and reversing the stairs (depending on upstairs floorplan) would make for easier access for moving furniture, adds more light from the stairwell into the entry foyer and the under stairs storage space could be included in the bathroom for more space but all suggestions depend on accurate dimensions

Thank you dreamer

Wow, OKLouise, that looks great. I think it is also doable with the dimensions. Thanks so much for putting that together, I really appreciate it!