If you scroll down your Main Game screen you soon find that there are more Workbenches you can put to use but you must first Unlock the Area. This is done by Upgrading your Workbenches and completing Quests.
A (Below) The Padlock Banner tells you what you must do and Quests you must complete to Unlock the respective area.
Also you are provided with B the Unlock time (time it takes to Unlock the Area after completing your tasks and quests). Once completed Quest Icons will have little Green Check marks in their top left corners.
Once the requirements have been meet to Unlock the Area you tap on the Start Unlock button and you will see the timer counting down, you may skip this process by paying Super Cash.