I'd suggest framing it out and using it as a window seat. A carpenter could get that done in half a day. Anchor the frame to the wall, get a custom cushion made and fill it with some cushions and you have a beautiful space to read. Bonus is the minimal cost.

Hey Nik Star, I've had a PowerPoint play with oklouise's edits. This is what I meant about garage entry to the pantry and a laundry in the garage. The red arrows are to stipulate to the builder that level access is required. I added extra garage depth to allow for the garage, that would definitely impact your facade elevation. If you remove the wall between the butler's pantry and mudroom you would have a SUPER PANTRY! But a true butler's pantry in that it was supposed to be where you would land with the veg from the garden so you would kick your shoes off inside the door, so I've noted a little bench seat there, then head in and wash it before heading over to the actual cooking area. Then if you get rid of the sliders and reduce the storage to shallow shelving on the middle wall you would have plenty of space to manoeuvre with mobility devices. For the washing labour machines - washer, dryer, dishy - try getting those mounted on plinths so the load on your poor back is reduced. I have dodgy joints so I am researching all the ergonomic ways to design work spaces to help me when I get to the awesome stage you guys are at with getting to build!

Also if i can avoid moving air con for now that would be great. The next phase of reno will be to take down the wall between lounges and put aircon on the front wall of the lounge as it's the only other outside wall it can go on. Here might be my plan for now. I'll put the kitchen in place and figure out if i need to add more storage to office area. Will add range hood and a few long open shelves like in the image below (and is also the look i'm going for decor wise)

@dreamer : That's exactly what it is, kitchenette - handy for drinks of water, making tea/coffee. We had a undermount sink there instead of vanity bowl, but the cabinet and stone was already cut which restricted use of undermount sink. We are happy with current setting of vanity bowl and pullout mixer. FYI....there are already two bathrooms upstairs ( 2separate basin inside them) so no need to run downstairs :) . @kate Sure, please allow me a day to visit site and do the actual measurements. Will share it here soon. . Actually, my partner and both work from home most of time and we have one dedicated study/office room which one of us will use. But we are looking to see another place where we can setup a office table/chair or some sort of study nook. House is built as per the plans (ground floor is here). Could you suggest another place where we can setup a office table/chair or some sort of study nook as we were thinking to put somewhere in rumpus area as I mentioned in the first post of this thread.