The Off-White House was one of the large-scale architectural achievements of Dr. Koepp. The exact date of this construction is unknown, but his Gray Mountains Asylum project is dated at 680 GUE. Dr. Koepp later miniaturized this building, and resolved major construction issues such as faulty foundations, weak support beams, and potential flood and slide zones by performing extensive testing on the miniature models. Certain functions of the large-scale buildings were restricted to being controlled by manipulating a switch or button on the miniature models.

SOURCE(S): Zork: Nemesis (game, design documents)