I understand wanting to keep the views from as many rooms as possible. However, how much time is spent in the bedrooms? And is the view visible the majority of time one spends in the bedroom? Consider that the most restful, secure sleep is obtained when the bed is placed opposite the entry door. That is not possible in any of your current bedroom layouts. Perhaps you should consider single solid glass French doors or windows flanking the beds opposite the doors rather than the large windows you show on the plan. Choice of doors or windows would be based on accessibility to a deck. I assume bedroom 1 and the office/bedroom have built-in bunk beds. I think the deck between the family and bedroom 3 seems inaccessible and a bit of a waste, and I wonder how one gets outside from the kitchen with the trash, etc. Do you have no plans to garage the vehicles?

There is no common link, no continuity that each dwelling share. i would introduce an element to both structures, borrowed fm the other, so for example the red brick and windows are the most striking design elements in the house, however the rendered garage with a parapet and no visible roof may as well be from another planet, I would brick up the front piers aside the door, with matching red brick, and then I'd install some post and beam rafters that could extend over beyond the garage door, almost like a flat eave, however just beams, no roof, and paint it chacoal, I'd then link a path from th garage to the house, and create the same detail at the porch entry of the home, same beams, colour and materials, so it looks like they belong on the same property. also, perhaps a little scary to consider, i would render the wall in between the door and the first window only, and paint the front door in the matching blue. Windows I'd go charcoal as per th beam structure, and apply a stained timber batten to the flat parapet above the garage, so paint that black, then fix timber battens vertically wh enough spacing to see that black shadowline, it will modernise it, emphasising the elongated design, which is both contemporary and popular, and tie this timber detail into the house with a generous deck. Both timbers will link, over scale th deck, perhaps stagger a step or two, as the garage is over scaled also. remove the fence, and landscape the corner with over scaled shrubbery, a meandering path to help invite ppl between the two structures., the visual disconnection is the fence, but it translates into everything else. if a fence must be, then consider a half height one, or an informal row of sleepers as uprights, to softly define the yard.

I meant to say if we clad in dark blue board and batten from ground level up to floor level of deck. I think if that side wall is all light coloured silvered cedar, the house will look mammoth. Ugh! The black stuff going down the side wall on an angle is water protector. It will be covered by whatever cladding we go with.

I'm not a builder or an expert . The downstairs looks easy -- obviously you want exactly the same width and profile -- take 1 or 2 boards off the end of the house , add new boards , paint the entire thing . The garage will 'hide' the existing side wall , so that can be left as it is , relined , painted , whatever you want , as its now an 'internal' wall . Upstairs though is trickier -- I assume there are horizontal weatherboards along the side of the house , so adding across and 'around the corner' would be more difficult , but not impossible -- it will take more labour and a bit more materials . At the end of the day , talk to your builder -- they are the one that will asked , so if they say No , pretty much the end of the conversation -- you accept , or you look for another builder , who hopefully says yes , and even more hopefully , actually can do it haha !