Space area

I need the area of spaces including the area of the walls.
Interior walls to center of wall and exterior walls to outside of wall.

Any ideas?

Assuming your spaces are bound by the interior face of the wall:

Get the bounding elements of the space,
Offset the matching location curve by the full thickness parameter value for walls with an exterior function,
offset the matching location curve by 1/2 of the thickness walls with an interior function.
Create new polycurves by the offset curves.
Get the area of the polycurves.
Write that value to a new parameter (ie: dynamo calculated area) for each space