Once again, thanks everyone for your thoughts. The idea of a skylight is definitely on the cards - the glass doors are something that we just like on all the other doors, with the toilet just being the question. Also, a skylight might be a bit beyond our DIY (sky-tube maybe less so?) and trade work down here takes time (I'm not just in Snowy Mountains rural, but then down a country road 25km, plus another 2km of uphill dirt driveway, and the trades don't always show willing) - things we can't do ourselves take time and frustration. What Maguire Architects says about heat loss is important to us though (thus the double-glazing, storage heaters, etc.), so I've particularly taken that on-board. As for IKEA (jajlynn, Belinda)... jajlynn, that kitchen looks fantastic. I love those overhead lights - they really suit the style. Brisbane IKEA did delivery to Sunshine Coast, but the cost was pretty exorbitant, and they wanted to charge that each time more of the ordered stock came in. It got so frustrating having an incomplete kitchen, waiting for stock, we eventually brow-beat them into sending the stuff from a Sydney store (something they were very unwilling to do, even transfers between stores). They sent whole cupboards by Australia Post, slathered in standard stamps - it was weird. But it got done, and it got put together. Before and afters below Belinda, I'll be honest with you: as much as the IKEA kitchen is better than the Mitre10 kitchen, instruction-wise, you're gonna swear. You're gonna have to paint over the blue when you're done. ;) Just remember, when you're swearing, and probably at each other (assuming there's an other here - otherwise, at yourself and everything else), but it's just a kitchen - you'll get it done, it'll look great, you'll be justly proud and you'll want to do your next one (maybe not straight away though ;) ). That's why we're doing stuff here straight away in the new house - it gave us confidence to do it or learn trying. Now if you'll all excuse me I've got to get back to swearing at pantry wall cabinets, at my partner, at Mitre10, at the government, at that thing over there whatever it is, and at cursed fate that placed these suddenly-discovered slightly-wonky walls between me and happiness. ;)

I put a lot of thought into what kind of sink to install ino my new kitchen: single vs double, stainless steel vs other materials, dish drainer or not, and finally undermount vs top mount. I went safe and chose industrial grade steinless steel, double sink without a drainer but with aditional part with multi purpose. I was very indecisive about the last thing: undermount vs top mount sink and finally decided after reading this - I will go top mount.

I have a separate guest toilet without windows using a ceiling extractor fan - not a problem. I also have internal cavity sliding doors to bathrooms and toilets and love how they give extra space and options regarding placement of items. Another location alternative for you may be between the cinema room and the kitchen, depending on what you had planned for that extra space in the kitchen. Two metres is a wide hallway, if that is what it is? Ours is 1.3 which is considered wide (as we need to accommodate a wheelchair which has to turn into doorways). An advantage of a very wide hallway is it gives room for extra furniture placement such as bookshelves, linen or other cupboards if needed. I don't see a linen cupboard or pantry cupboard in your plans. Something else to think about is future proofing - try to cover future possibilities with regard to function, as making structural or fittings changes later can be more expensive, and may come at a time when you can least afford it (e.g. injured, disabled, children, aging or other such people visiting your home). Lives change, sometimes over time, sometimes in an instant, and suddenly the doors are not wide enough (especially the toilet door!), or the walls are not strong enough for a weight-bearing rail, and a host of other things. We put 900cm doors as a minimum and it makes life a lot easier, including moving furniture in and out. Universal Design principles are worth a look. Sadly these considerations are currently considered special or optional, although there are moves to change that, so that builders and architects will consider these things as standard.

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.