Shack

A Shack is a basic residential building that can be purchased with Exposition Points during Exposition.
 * It can be upgraded from wood to stone.
 * It is one-story by default, and it is unknown if it can have a second story added.

Presumably after Exposition, similar buildings may be constructed, but these will require blueprints, materials, etc.

Trivia
During Exposition, shacks can be purchased for 100 EP. Stone variants would cost an additional 50 EP.