Hey there @Softis, welcome to the Discourse! Do you by chance have this saved as a template? Stephanie and the devs are looking for examples of buildings that do not build. You can find instructions on how to upload a template over on the thread here:
http://discourse.stonehearth.net/t/the-buildings-my-hearthling-will-not-build-thread/14704/45?u=jomaxro