square footage/layout
The size, or square footage, of your design will have the most impact on your cost to build because size affects all of the other variables. Your M.T.N designer will explain how your layout will affect the total cost to build and offer ideas for getting the most from your space.

what is livable square footage?
Spaces included in livable square footage must be conditioned spaces. This means that they are heated or cooled for normal use. This usually includes the main level, second stories and basements.