Emily A permanently roofed al fresco will reduce some summer heat gain (although sitting out there may be uncomfortable) and will do the same for winter. From scanning the comments it appears that you are at a point where you can still may major changes; I cannot recommend strongly enough getting the orientation of your new home right, it will be warmer in winter, cooler in summer and be significantly cheaper (if not free) to run with some appropriately detailed insulation. I do understand the appeal of a floorplan that seems to be all you have aspired too but have seen many a case where people have later regretted those decisions. If you are unsure about the pros and cons of various floorplans then get a design professional (building designer/architect) to give you guidance on an hourly rates basis. good luck

House has many good features, I love how the bedrooms are divided from the living area, that can be very important if you have young children. I even like how the door to the laundry is screened from the dining area - little things like that are important to me. The toilet in the bathroom would annoy me, but having the second toilet in the laundry would offset that. I think I would be inclined to close off the lounge room as a TV/Media room that would free up the general living area for just living. The outdoor areas look well planned with excellent access from the house. Oklouise's idea of relocating the kitchen looks an excellent idea but plumbing could be an issue here, firstly it would be expensive just to move the plumbing and something to be generally avoided with renovations, and secondly with rooms underneath the house, it may not be possible. As the kitchen is now, opening it more to the living room could be a good idea except I can see possible safety issues with the hotplates being exposed to passing traffic - especially with young children in the house. I agree with David - you do have to think about how you are going to live in the house and the lifestyle you envisage. For this reason, if you do decide to purchase, I would strongly suggest you live in the house for a year before doing a thing. That way the things that aren't working for you will become very obvious as well as things you need or would make life easier making decision making simpler. You will also get a feel for the lighting in the house, where it can be improved and the aspect of the house - what rooms may need warming (south facing rooms) or what rooms need cooling (west facing rooms).

OP, OKL's plan is better from an energy efficiency point of view than your plan (your plan wastes the northern aspect with bathrooms). But DON'T just flip OKL's plan, as the orientation would then be all wrong! It's important to get the orientation right, this will greatly effect the comfort of your home & your heating/cooling requirements (& hence your bills). Read this. It's all very useful, but maybe focus on the section about orientation first. http://yourhome.gov.au/passive-design Below are some generalisations. As has been requested, it would be nice to know your general location, as climates vary across our big country, so building requirements change. But generally, you want your living areas (& a large proportion of your glazing facing north). If possible, have a smaller portion of your glazing facing south & east, for cross ventilation, & try to eliminate western glazing. Bedrooms to the south & east (if they won't also fit in the north), & rarely used rooms, like garages, bathrooms & laundries to the west. Your verandah is south facing, good, as it won't shade your home in winter. Hopefully you have north facing eaves & they aren't too large. If they are the right size you'll get sun through your northern windows in winter, but the eaves will shade the house in summer, when the sun is higher in the sky. So can you knock out windows & doors wherever you want? Would be good to know where they are currently, the size of the verandah, the block dimensions & any other structures which will influence shading & privacy. I'd also be looking at some tiny house blogs/websites. 72sqm isn't tiny, but you really want an efficient house that works well, & you'll find some ingenious storage solutions that are used in tiny houses. Well designed built in storage is definitely very important in a small home. Can't see if it all fits now, while using the app on my phone. But I'd aim for something like this. The kitchen in the NE corner, running down the eastern wall (so you get good morning sun). An island bench for dining, separating the living area on the northern wall. Master in the NW corner, with the ensuite on the western wall (if it fits - important not to have the master bedroom window facing west). Minor bedrooms (& windows) on the south wall. Main bathroom or powder room somewhere on the southern wall, in the SW corner would be nice if it fits there. No idea is that all fits, just some ideas. If you're not fussed about an easy facing kitchen, you could flip this all, & have the kitchen in the NW corner, & the master in the NE corner. If you're taking off external or internal cladding, this is a good time to insulate you're walls. Also up insulation levels in the roof cavity of they're inadequate. It will greatly effect comfort, is quite cheap & the walls are very hard to do at other times. Edit: as I got the verandah location wrong, then added to my post.

Thank you oklouise. That’s very nice of you to offer. We have had a builder provide some advice around some of the structural walls, etc - one of which is that little storage area under the new ensuite. We had explored removing that to make it a double garage but it really would blow out costs and advice was the extended double garage would probably be cheaper. I do very much see your point about spending money on legal-height extra room though - makes complete sense. I would like to do something with the front porch - with the deck and under deck areas, I don’t foresee us using the porch much at all. The exterior house walls are structural though so again, it could be costly to move. There is also a window into Bed2 that opens onto the porch so this would either have to be filled in (there is another one but not sure we want to decrease light or breeze) or built around. I did want to close in the screen door to the living room and build in a bit but it could be a lot of expense for perhaps a metre wide gain!!? I wasn’t sure how we were going to use the storage under the new ensuite but from your design, I think that garage area would be good as the kids play room and that area as their toy/games storage. With family overseas, we usually travel once a year and have luggage for all of us so happy to have just an extra storage room (such as that under the porch). We only really need 4 bedrooms so I still think sacrificing the upstairs study is probably still the best use of space. We were going to do the reno in two stages - garage, ensuite and stairs before we moved in and then downstairs afterwards. Perhaps we hold off on the stairs to live in and feel first.