Quote Originally Posted by travajante View Post
For the same area, sprawling roof cost, esp w/ clay option, can shoot up the expense significantly to offset the added structural requirements of suspended slabs. Then, there's the likelihood of greater wall+roof beam perimeter/volume....this could swing the comparison in favor of a boxy multi-storey.
That said, one can never take for granted the architectural side of things. The gap between a good, experienced 1 who focuses on function, cost over form vs 1 that 'just designs' can be wide.
Just too many factors to generalize the comparison. Apologies if this won't satisfy the inquiry. It's not as simple as one would like to think.

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How about a ballpark figure? Like is it 10-20% cheaper per sqm if 1-storey vs 2-storey?