I think you have too many windows for the climate. Even triple glazed is not as good as an insulated wall.
Make the two back bedrooms the same size. You may only have one child nut next family may not. It is a huge house and wir without a study
Question the coffee station in hallway when u also have pantry. Seems to be a 3rd zone. Will it have its own fridge?
What the contour intervals - which way is slope and what is the level change

And site boundary please

Thanks Kate. Appreciate it
Site boundary is too large to show - a few acres.
No kids and spare bedroom will double as an office.
Slopes down roughly 1.2m from top to bottom of build.

I think the homes orientation with north and your views are good. Regarding cold winters, I would install floor to ceiling curtains to cover those windows when required. Otherwise a great home, with good multipurpose rooms.

Is that the dining table built into the bench? It can look stunning but it’s doesn’t provide flexibility. I’d also consider a double front door to suit the house and 5he acreage. And a spot for an entry table/drop zone where guests arriving from the front can sit keys/coats/shoes/etc.

So 200mm contour lines?

2500

Okloiuse, refer previous additional post by Jan Dobson

Thanks. Didn’t realise we had double dipped.

Knowing the Canberra climate, I have a couple of thoughts. Will the eaves provide sufficient shading of the large expanse of windows through the heat of the summer, or will you have other means to externally shade the house? Will you have covered outdoor area/s, practical both for summer shade for outdoor living (near living/dining) and for things like taking off muddy boots after taking dogs for walks, etc (near laundry)? Also, without being able to see dimensions clearly, is the attached garage a generous size to allow space for two large vehicles? Given you have the land, I would suggest bigger than 6x6 for the cars plus storage.

Garage

What are the spaces on west side of living dining with the diagonal lines

Dividers to create privacy from the front entrance. Probably bookshelves. Thanks

I would say they are Pivotal room dividers. Having the option to open or close wall. There are also the same either side of the front door externally. Good for privacy and regulation of hot and cool weather.

Sorry Kate D, crossed over on post. Loving your choices of design.

Fabulous house Kate D, I have added a few ideas for you to consider, like being able to see the view when the entrance door is opened. The coffee station adding a sink. The WIP having access closer to the garage for unloading groceries. The ensuite having access from both sides and the WIR opening up to the light and view expanding that space by using the passageway.

Changing the position of the Bathroom for when you might have guests and working in the home office noise won't disturb them.

The laundry is great with internal and external access, great for when bringing the 3 dogs in from the car or yard. Will you be bathing them in there or using the bathroom?

Rubbish bin storage and access from the kitchen , plus laundry drying., water tanks, guest parking etc

These are just my thoughts for you to do as you wish, very exciting

i've included ideas already suggested by others but, having lived in a similar climate on acres, my suggestions would be to include more internal doors to zone separate areas of the house for sound and heating control, windows and external doors need to located and sized for views, passive solar heating and Basix certifications and the narrow verandahs may need to be reconsidered as railings may block views (but are the narrow verandahs for windows cleaning or outdoor seating?) but i've increased the alfresco to includes a seating area, rearranged the office to have external access and closer bathroom for office and guest room and enclosed the south courtyard to simplify the roof and create a covered outdoor drying area and undercover access to the laundry and safe dog enclosure and dogs should not be allowed to roam anywhere they will have unrestricted contact with snakes, kangaroos, foxes, livestock, spiders, ticks, bushland etc and consider electric underground dog fences as well as standard fencing to protect the dogs

Can you shift the front sections to the right to allow a bigger centralised front door that is then opens up between dining and living to see straight through to view beyond?

Already did the view from the front door through the family living

those changes reduce the width of the garage and lounge and adds more to teh already extra long hallways.. while the spine walls through the house will determine the shape of the roof (although the narrow verandahs will help the overlap between master suite and living) the roof is more complicated than the location of the front door and given the choice i would not have a symmetrical front entry to make the space within the entry more useable and imo off setting the front door and keeping the entry lower ceilings makes the movement through the entry more dramatic than being able to see everything from the front door but every suggestion is worth considering

My comment was re the view from the front door opening up to the view without moving walls, if you have it flaunt it. In a house like this I would love to see full height doors, ie floor to ceiling as per commercial builds

I wasn’t losing garage width just shifting it all to south. Reduces hall length slightly at wir.

Your post asked " Would be keen to get suggestions on how to make better use of the orientation. ", Our Master suite with large windows has a similar aspect as yours and find that it can get hot in the morning in summer. Suggest that you install automated Blockout blinds to all windows facing that aspect and view.