Crash,
Here is our four seasons room that we added on.
In our four seasons room we also added a half bath so when they come in from the pool they can come right into the bath and four seasons room.
Then above it we added on a huge master bedroom bath and his and her walk in closets.
Here are the pics. of the bathroom:
We ended up putting the toliet in its own "water closet" as they called it I did not take pics. of that. The shower is also tucked into its own area. In total it about 700-750 square feet. We also added a basement underneath the four seasons room.
Hey, I want to see the finished pics. of the bunk beds you made!!!