The Carriage Building Shop arrived with the Engineering Update, It is quite a big building and technically the game allows you to only build one per Territory… ( you can build one and actually move it to another location if needed but since they are enormous, having multiples may prove to be easier said than done. Perhaps just using “urgent orders” will be enough to help you along for the tasks at hand!
Golden Frontier Chimney Recipe
Golden Frontier Forcer Recipe
Golden Frontier Framework Recipe
Golden Frontier Tender Recipe