Hey @TheDomo, sounds like something with this building is so complicated your Hearthlings can’t even figure out how to start 
! Can you save the building as a template and upload it to the thread I linked below? @not_owen_wilson has been working really hard on building related fixes in this alpha, and always likes getting new things that he can get working. Instructions on uploading a template are at the link. BTW, what version of the game is this?
http://discourse.stonehearth.net/t/the-buildings-my-hearthling-will-not-build-thread/14704/45?u=jomaxro