On January 16, 1911, M.O, Folsom filed his map for the East Addition subdivision to Susanville. It was located east of the town and north of Halls Addition. The property was familiar to many, since it was the location of the racetrack and fairgrounds that had long since been abandoned. In the summer of 1912 work began to clear the property of sagebrush and grade streets. In addition, two speculative houses were built at North and Spruce Streets. The 300 lot subdivision created the following streets–First, Second, Third, Fourth, Fifth, Grand Avenue, Oak, Fir, Cedar, Spruce, Park and Ash. Folsom had North Street extended to his subdivision. The street had previously terminated at Weatherlow.
The East Addition contained a number of covenants. No property could be sold or transferred to foreigners, i.e. “Chinese, Japanese, negroes, Hindus or other objectionable races,” or as the Lassen Mail noted, “This addition will be for the Caucasian race only.” The East Addition promoted its healthy environment–one with a sewer system and which prohibited stables for livestock. Finally, and, what was important for property values, each house. constructed must cost at least $1,000, though in certain blocks that requirements was raised to $1,500.