Buildings

Each Building may be upgraded as long as you have the required items in your inventory or you have the option to skip that step with Sunstones. The items needed may be dropped from harvesting crops, rewarded for completing a quest or Board Order, or acquired from other players via the Newspaper.

Special Buildings
These are only available by default or through expanding your farm.
 * Barn
 * Silo
 * Workshop
 * Warehouse

Related

 * Machines