Best 2nd floor layout! I love the idea of splitting the new octagon like that. The Octagon is a little too low (does nto connect properly with the other one) so you actually have even more room. I liked the mudroom area as well. I will switch the toilet and the shower to give a better view. I think the nook and the dining table seem too similar. I appreciate the cost estimate. Note that the new octagon should about 3' further up to connect properly to the current octagon. Also, more room dimensions would have been helpful.