In 1948, Siegel was selected to serve on the Southern California Advisory Committee for the California Housing Initiative. The committee circulated petitions and advocated in favor of the California Housing Initiative (Proposition 14) that was taken before voters in the November, 1948 statewide election. Proposition 14, which sought to implement a statewide public housing program for low-income individuals and families, ultimately failed at the ballot box but nonetheless laid the groundwork for similar legislation that was drafted at the federal level soon thereafter. The filed consist primarily of correspondence exchanged between Siegel and other public housing advocates regarding Proposition 14. Also included are handwritten notes; pamphlets; a voter guide; an operating budget; press releases; reports and summaries; and a copy of the petition that was circulated in order for the initiative to qualify for the November, 1948 ballot.