CityVille City Hall upgrades coming soon
Our friends over at CityVille Chat tell us that that you will soon be able to upgrade your City Hall in the CityVille. Some of the benefits for upgrading your City Halll will be higher population limits and extra rewards, such as Zoning Permits.
The images above show how the City Hall upgrades affect the appearance on the building, from Level 1 to Level 3.
Please note that this is an unreleased item -- so that means there's no guarantee on when/how/if this new feature will make its appearance in game.