Each building is unlocked at a certain experience level. The first building is unlocked at xp 2. The last building is unlocked at xp 87.
For a much more comprehensive table see our Production Buildings List. Note that it may not be mobile-friendly, though.
Buying and repairing buildings
The higher the experience level the more expensive the building. The Lure Workbench is the only one given for free.
Building the machines takes time, increasingly so. Players can use diamonds (dia) to speed up the building process.
Production and queue
Each building produces one item at a time, after a few minutes or several hours depending on the product. The Mine is the only one that gives items instantly.
Each machine has one to three slots at the start, which players can use to queue things up. Once queued, products cannot be discarded or switched.
You can have a maximum of 9 slots per building. Completed products are displayed in front of the building. If your barn is full, you can add additional products to the queue without collecting any of the completed products. This technique is called “stacking” and comes in handy when preparing for certain derby tasks. The maximum number of completed products that can be stacked is 52. At that point you must collect a completed product before you can add another product to the machine queue.
The amount of diamonds required to buy additional slots increases with each expansion: the first additional slot costs six diamonds, the second one nine, the third one 12, etc. Additional slots for the Lure Workbench and the Net Maker are much more expensive (the ninth slot costs 415 diamonds!).
Main article: Masteries
Masteries are bonuses players get when they have used the machine for a certain number of hours. The final mastery level or ★★★ level always speeds production up.