As chookchook said in her recommendation about painting, put a drop cloth on the floor. Get a very safe ladder. remove the lightbulbs, and cover the outlets. Turn off the electricity to the chandelier. Then spray it with a mild cleaner (I use one I found at Target that's basically water with vinegar, until it's dripping wet. Start at the bottom and work your way up, so you don't have dirty spray dripping on the bottom of the chandelier.Work your way up and down until the dripping spray is clean. The chandelier may be gorgeous and expensive, but it seems totally out of place in the architecture of the room--more at home in a chalet than a sunny room with a window wall. I would probably try to find a way to get it removed, and sell it to someone who appreciated it better than I.

We are also building in Christchurch :) So also had to look at these kind of requirements for sun, but we had a much smaller section to work with (800sqm). If cost is OK ideally a 2 story would get light into more of the rooms. You also saod the street frontage is 35m but the plans say currently the width of the house is only 15m, so you could run more of the house along the frontage to get it aligned with North. Its a big section are you setting it very far back from the street? Or are you worried about privacy? Is there a view Northwards, otherwise if you can set back from the street and add hedging or plantings to increase privacy I would try and align as much of the living space to get the North and west sun. Depending on what your roof is like you could also add a clerestory to get light towards the back - we are using skylights as well for our back hall and bathrooms to make sure they get as much natural light as possible.

I'm no architect, but I agree with yours. Instead of large windows in the loft above the garage, what about a high, short, but long window....non opening? Here's some examples

Provided there is 1200mm clear between the breakfast bar and the opposite bench then by rights, you should have ample room and if that's the case, I think I would opt for the design with the kitchen on the eastern side. My reason; you get a much greater feeling of open plan by having the dining and lounge on the North/South plane. I like the large WIP in this one - on paper at least. The second plan somehow feels wrong. I personally don't like the idea of having the breakfast bar being located in the lounge. If it were me though, I would ask for a 3D CAD plan of both kitchens [to walk through on the computer] before making up my mind on which one to opt for as it gives you a much clearer vision of what the finished kitchen will be like rather than looking at a flat plan.