By achieving certain levels of population in your city, new buildings will become automatically unlocked that would otherwise not be attainable. Below is a list of those buildings (on the right), along with the necessary population needed for those buildings to be unlocked (on the left).
- 100 - Post Office
- 3,000 - Museum
- 5,000 - Mayor's Mansion
- 25,000 - Court House
- 80,000 - Medical Laboratory
- 100,000 - Center for the Arts