typical dogs breakfast Queenslander! I would make the entrance into the current bedroom 1 and turn current entrance/lounge into main bedroom with sunroom where current entrance is...nice place to relax with doors open. Then I would knock the wall down between the kitchen and current bedroom 1 to make one large room from front to back and put the kitchen along the wall against current bedroom 4 with long bench with dining area one end and open plan lounge at other end. I would wall off bedroom 4 and only be able to enter it from lounge. another door in lounge to enter remains of bedroom 4 which I would convert to laundry and then entry to bathroom. Block current doors from kitchen into bedroom 1 and bedroom 4/bathroom. Either block door between bedrooms 3 or take wall down to make one big room. Scuttle outdoor bathroom/toilet to make one long outdoor area that opens up from kitchen dining area. Probably put a skylight in kitchen area too.

i'm glad you're planning to reroute access to the garage: clumsy traffic pattern change a generous room into a big hallway and can't stop thinking about your kitchen..1. where you have narrow cabinets/shelves in the pantry...it's possible to have built in shelves inside the dividing wall (think about the size of what you want to store: cans, bottles, skinny packets? and put 60cm base cabinets on the other side, next to the freezer 2. i can't see the yellow highlights for stools 3. width of pantry is subject to you wanting to keep the door to the formal living room...if so, measure 150mm past the door opening and that's the minimum width of the pantry but 1500mm allows space to comfortably walk past your freezer and have full size base cabinets with pantry drawers (cleaner than open shelves) 4. space between the b'fast bar and 'fridge should be at least 90cm but if you choose a wide b'fast bar and a big 'fridge a bigger space is preferable (stand a couple of chairs 90cm in front of your current fridge for a few days and see how it feels) direction of fridge door opening is also critical, first for the cooks and then everyone else: if the size of the b'fast bar can be enlarged or reduced with overhanging counter then a change of walkway is not so difficult 5. as suggested by girlguide, the cooktop and rangehood might be better on the outside wall for ventilation 6. there seems to be a lot of small cabinets and drawers in your plan and there could be some better (and cheaper) combinations but when i tried to access IKEA kitchen planner to confirm available sizes it's not responding today 7. i've attached my suggested approximate base cabinet sizes: starting with corners and work outwards, aiming for the biggest standard carcases and then add drawers to suit purpose ..

I would prefer to have the pantry and fridge close to each other so that you’re not trekking from one to the other when taking food out to prepare. Then have all of them near the prep area and sink. Bins/compost bin close to sink for disposing if food scraps when making food and scraping plates after eating. Keep ovens and cooktop close to each other. And you need adequate space beside the sink for stacking dirty dishes and draining dry ones (even with a dishwasher) and space beside the cooktop. Minimum of 30cm bit more is preferable. Good luck. Exciting time.

I agree about not putting the fridge on the other side of the walkway through the kitchen. However, I think the same about the microwave - unless you hardly ever use it. And if you hardly ever use it you could put it below bench height and put a wide shallow pantry where the microwave and fridge currently are. I use my microwave a lot and so have it at about bench level with a put-down space beside it. If you do decide to leave the pantry where it is (with a cavity sliding door), then it has some advantages. It the most efficient way to use an internal corner. I have different depth shelves in my pantry. I find the deep one very useful for large items and put stuff at the back that I don't use very often.