This is a very important indicator for the estimation process. Bali Hip Roofs and Steel Frames with SIP panels start usually at the Mid Level. The chosen quality level influences also the choice of your finishes like flooring, bathroom tiles, countertops, doors windows, and detail level in general.
Additional rooms like, extra guest rooms, office, library, yoga room, gym, ...
A small powder room accessible usually from the main public area with a toilet and a small sink.
This is the total of your square feet so far.