A Pig House is a house in which pigs reside. They are frequently seen dotting the landscape and function much like Rabbit Holes. At night, Pigs will enter the houses until the following morning when they come out. If the pig from a house is killed then it will respawn from that house four days later.
Players can build these houses after prototyping them from an Alchemy Engine. Building a house will immediately spawn a pig and then the house will function similarly to one of the naturally occurring buildings. While the houses tend to have lights, if the player gets close to the house then the lights will go out. This will prevent the house from providing the player with protection at night.