Houses can be built almost anywhere in a variety of styles and sizes. Once built they can be adorned with a wide variety of items, some useful, some purely decorative. They also allow you to log out safely in the wilderness.
To build a house you need a lot of wood, stone, and as many helpers as you can get. The more people available to help, the faster a structure can be built – and engineers build a lot faster than unskilled people.
Castles are large fortifications, that cannot be built from scratch, however the ruins of old castles can be restored by players.
Castles are the only buildable structures that can have walls raised to keep out other players, with mannable battlements.
Each castle location has an inner and outer bailey. The inner bailey controls access to the keep, while the outer bailey is large enough to build several houses and structures safely inside.