There is nothing like getting excited about architectural features that look beautiful on a 2D floor plan and feel even nicer when standing inside of the finished home. Details like expansive floor to ceiling windows, skylights and other architectural features could have an impact on heating and cooling your home when your energy bill arrives. While it may not be a concern now, think of green cost savings on your architectural features of your floor plan for future living too.
The other thing to consider is the quality of the space. The rooms created would be just under 3m x 3m (approx 9ft x 9ft) which would be very tight for a double bedroom. So this means this space could be used for a small bedroom or perhaps bathroom or dressing room depending on how the internal layout turns out.