Join Date: May 2016
Location: Deltona, Florida
Welcome to the site, Butler.
If the shop is attached to the house, it might come under different regulations that require "living space" compliance. I don't know if that's why it would cost so much, but that's my guess.
I'm looking at a concrete foundation and steel building built to hurricane standards here, in Florida ... all for less than $20,000.00. Another couple of thousand to wire and plumb it (if I decide to plumb it).
WAY less than 100K !!!