Hi,

My wife and I are going to build a new house. My father (a builder) is
going to act as the general contractor. We want to take a stock plan
and make some modifications. Primarily, we want to remove vaulted
ceilings where present, and open up the area off the bonus room for use
as a walkup attic. Are these type of modifications simple enough to be
done to stock plans or are they too extensive?

Thanks!