Good question. It's 13 atm, I'll be sure to include that in the update, thanks!
Thanks I appreciate you answering. Does that mean mean building a well allows 14 civs in the four surrounding tiles?
Building a well only contains fires.
If you mean getting the 5 of clubs event and discovering a spring then yes you may increase a 13 civ housing tile to a 14 civ housing tile.
PS. There will be housing cap modifiers in an expansion ;-
