State retrenchment, public input requirements, and local budgetary constraints make advocacy organization’s (AO) work vital to the adoption and implementation of local plans. Yet, the strategies AOs use to influence policies have gone understudied in planning literature. The current study fills this gap through a case study of how AOs exert influence in planning for affordable housing in four cities in Los Angeles County. Data were collected through interviews (AO leaders and city officials), document review (AO materials), and content analysis of Housing Elements. The study found that the range of tactics depends on the political context and organizational resources.