Around 1970, the City of Berkeley briefly became an epicenter of radical experimentation in urban planning and design, directly stemming from the counterculture of the late 1960s. This essay examines the ideological and political emergence of Berkeley’s counterculture urbanism, arguing that its experiments left two important legacies in the history of planning. On the level of utopian thought, it articulated a clear alternative to mainstream capitalist urban development, or what Henri Lefebvre called “abstract space.” On the level of contemporary planning practices, it opened up still-unresolved conflicts, especially between localized environmental preservation and the abstract, economic demands for affordable housing.