finyo, also be prepared that the answers from them may be much the same if you received here. If I called a local US homebuilder and asked how much it would cost to build a house, I'm quite sure they wouldn't just throw a number out on the table. I wouldn't expect them to. As many here have said repeatedly, there are a number of variables to be taken into account.

Could you put the laundry behind doors so that you won't see it with the walk through...by the way...I am just over the water in OZ, know what you mean by costs... will get some pics....this would be my option...just going on what you are saying.... The good thing about this is that you can shut the laundry away except for when you are washing...... I would have the washer with the dryer next to it if you can and put a bench over the top of the both of them....for this it is worth getting a front loader if you haven't already got one.. this will avoid the bench on the other side...it can all be contained and done on the one side of the laundry. Don't go for sliding doors ...the glass look great but they will need a bottom track and if they don't have one...they will move a lot....not great for this even though they look great. As for having the bench over the top of the washer and dryer, you can then have overhead shelving, does not need to be cupboards as the bifolds will hide what is in there...double cost other wise. hope this helps...Robyn

~$400 including expedited shipping. My GC just had his regular countertop guy do them, which wasn't great.... he had trouble making clean cuts. If I were going to do it again I would have pressed for someone with expertise to cut them. You can see in the image that the facing is not made of the stone peak, because too much was broken during the cutting to make the mitered edge. I'm a little bummed, but mostly pleased with the surface (which is the important part) thus far.

Well balancing out material and costs labour costs is one thing but 2 story is quite a bit cheaper to build ; far less foundation and roofing area. It also simplifies the plumbing and of course is far more energy effective as downstairs heating will also contribute to upstairs heating. PROs can develop on this. And as Curt points out, modular is a very fast and cost effective solution which can allow you to put your pennies into better quality. Be very careful to select a known and competent professional if you go this way though, i don't know about NZ but europe abounds with cowboys ; low costers are to be strictly avoided.