You would have to ask SCA. I believe the gable roofs are for council (streets-cape). The cladding being corrugated, cost (pre-finished) and proximity to the coast (durability).

Thanks again everyone. These are the best plans I have, still a little hard to read. https://www.dropbox.com/s/zlrfdddp702e45v/2nd%20floor.png?dl=0 Above are a few quick renders of the stair location/direction being changed, and a random woman to use for perspective! Thanks Oklouise! Siriuskey, is this (above) what you had in mind for the kitchen? Looks nice, not sure about cupboard space though? Laura really wanted a butlers pantry, but I don't think we have the space, but I was trying to have some sort of walk in pantry. And this was the last version I had designed before getting your suggestions on here: Not sure if this will work, but here is a link to the FloorPlanner project, if anyone wishes to tinker! https://plus.floorplanner.com/projects/53937748-our-houzz/viewer

The bathroom transformation is amazing! The mirror you chose was a great option! Thanks, the Clipsal team

I love the interior , but personally I find the exterior 'confusing' . Basically the interior with those really interesting windows done in black instead of white , looks not only great , but period and presumably in keeping with the designers wishes , and lifts the rooms and focuses you . But to change the exterior of the windows to quite an insipid brown seems a strange choice to me . Charcoal would have looked great , or a bronzer brown or golder brown would have all suited IMO , but that shade does nothing . Was there a particular reason ? Slightly off subject -- I once did the concrete entranceway to a commercial building in a weird concoction -- a similar brown to your windows , with 3 or 4 different browns and even a golden hued brown applied using sponges while it was all wet , BUT also mixed in must have been 15-20kgs of steel 'swag' ( basically dust off the floor of my mates engineering business , we actually used a magnet to attract only the steel ) . It was rough as ( in several respects of that phrase haha ) but 25 years later , its still there , and has even more character as it has rusted and run over the years . I probably wouldn't do that on what seems quite an important house , or its windows , but the exterior colour reminds me of my 'experiment' .