Willie has a small red roofed house which he has always lived in. When Ottoborg's World fell apart, Willie was in his house, so he stuck with it. When Hoborg created the Neverhood, he included the house as a part of it.
Klaymen can access the red roofed house using the green car. He can take a look into the room but cannot enter it. The only part seen inside is a bed, some extra klay, clothing, a lamp, and a picture of Ottoborg that says Dad.