I think it largely depends on the buildings purpose and style!

Granny Flats (secondary dwellings) to me are afterthoughts. Its the thing you add to an existing dwelling. Therefore if possible do a duplex if its possible in your area. Secondary Dwellings cost as much as any other similar sized dwelling. Many think that as they're so small they should be really really cheap....

@dreamer thanks for your input. Do you mean placing glass sliders nstead of highlights for bed 1 and bed 2? Do you think that would be OK close to boundary? Also where would you place them for furniture placement? What type of door for bathroom privacy? A swing door? Do you agree with @kate to narrow the peninsula bench? Yes, this will be a rental for all ages. We have a very good highschool across the road and many, many.people move into the suburb to be in the catchment for the school. Eventually my parents may live here but that would not be for at least 10 years or so. What do you think of laundry space? I will need to check whether or not you are allowed to do this. Storage and porch areas do not count for internal floor space max at 70m2

Just thinking about this more....because it is better than doing my overdue tax or taking palm trunks to the dump... :o) ......All of the designs have such great features to them and in some respects I need to just get a builder to look over them to let me know which would be cheapest for what I need and would like. Once the technical things are sorted (cladding, electrical, plumbing, insulation), the things that I like in a home mostly are inside/outside living (seeing views) and a bright, light filled space (natural light). I find it depressing ...literally.....to be in a living space that is dark. I wanted the living area to be maximised in this space due to the work that I want to do in future with girls with autism; a small open plan kitchen with this and this area that we use have the higher ceiling to make it feel bigger.... then I need an office space, which could even be largely shut away within a cupboard if necessary. I will lose the view and a bit of light from the back sliding door because of me putting a privacy screen with gate between this building and the pool area. I have a slight view and good light from the big sliding window at the back (I would have to close blinds though, if people were using the pool area). I definitely need more light coming in from the East where the leaking colour glass window is, but I would like for them to be high so that I cannot see the neighbour's house. I think the windows on the western side are sufficient because it gets very hot on that side of this building from about 4pm (earlier in summer). Then the sliding doors at the front bring in light, but at the moment it is not totally private becasue it looks onto the road from a long driveaway. My main bedroom can be small as long as it has room for queen bed, good storage, and room for a dog bed for a golden retriever sized dog. I like the idea of having the dogs going on the deck...however, they do bark at possums at night.(They have a lot of yard to use too during the day). I do need a room where a mother and new born pups can be isolated from the other dogs). I like the idea of having a toilet and basin of some sort, separate to the main bedroom, if there is only one toilet, because it provides separation from my personal things to the main living area. I guess the second space for the dog and pups could be a laundry or a "bedroom" or "office" or "storeroom". The area for the dogs has to be on ground level and I think I would prefer my bedroom to be on ground level too as I am not getting any younger (and want to think about future needs) and ideally I would to be here til my early 70's if all works out well. It doesn't worry me whether the main bedroom ceiling is high or not, because I spend so little time in there. However, it would be good if the other spaces (except bathroom/laundry) had the higher sections of ceiling to make them feel bigger. I am only saying all this, because when I look at all the plans, I think the best one may end up being mainly from one, with elements taken from another. Thanks so much for your help. I still have the option (one day) to maximise the use of the big attic space in the main house as with the non-compliant stairs to it and only two tiny windows in it, and it being so hot up there, it is not really useable at the moment, but the pool house is highest priority because until it is liveable, then I can't recoup any expenses by renting out the bigger space (the main house). (It does look like a demo site though in many rooms,)