The Perfect Doozer Building is located in Echo Cavern in Fraggle Rock, and featured in the book Cotterpin's Perfect Building. Cotterpin Doozer has taken over command of the Doozer Design Office until Architect Doozer is healthy, and she decides to design the Perfect Doozer Building. After its construction, the Doozers attempt to keep the Fraggles from eating it, but after having nothing else to build, they invite the Fraggles to an "All You Can Eat" feast in Echo Cavern, to essentially destroy the building.