[biggrin]Hi there, well Ive been buillding commercial and residential most of my career now not to mention a few bridges, so the best thing about it is, you can basically have what ever you want in size and shape as long as you do have all your designs worked out first, and yes it is a cheaper way to construct the best would to be have foam core in the concrete panels as this eliminates any[cap] problems with services, you will need to have a structual steel frame for internal floor fitout etc and the samr goe’s for the roofthe pre finish to external walls could be off formed concrete which in my view can look really good, cheak out syd airport domestic. if you have any other q?s just e-mail.