For each upgrade from the town hall,from level 5 upward., base enlargement warning is received by the player..the enlargement cost varies from how wide and how long your base enlargement is.
What's the deal?
*players will have more space to place their new buildings.
*to balance the new buildings requested by the players,if ever it will be granted
*to help players plan their bases smoothly without the worries of having a crowded bases.
What's the consequences?
Many, like having an easy to loot base or an accidental crevices in the base..but as I say,certain level of town hall is required to have this upgrade,thus minimizing the consequences.
What's the cost and the size?
For a level 5 th,the cost will be 1700000.and it goes up when you buy more..the upgrade size is the size of an army camp..always..and the limit upgrade is when you completed the whole side by side..
This should be considered as a must because the ever growing and upgrading community will soon have no space for the new buildings.