House is a building that increase your maximum population limit. It can be upgraded to House II - House III. The House I gives +3 population, the House II gives +4, and the House III gives +5. You can buy and place unlimited houses but the maximum population limit will only be 175. The maximum population limit of 175 can be increased when you buy a Parliament or a Babilonian Temple.

House 2

House II

House 1

House I

House 3

House III