2310 Mason St 9,974 SF Vacant Office Building San Francisco, CA 94133 $3,500,000 ($350.91/SF)

The American Federation of Teachers began in Chicago in 1916 as an affiliate of the AFL, organized by eight locals. The union represents classroom educators, paraprofessionals, higher education faculty and staff, government employees, nurses, and other healthcare professionals. The American Federation of Teachers works through collective bargaining, organizing, community engagement, and political activism to support public education, healthcare, and public services. The organization remains affiliated with the AFL-CIO and maintains a broad national presence through local affiliates across the United States.

The National Association of Letter Carriers is a labor union representing city delivery letter carriers employed by the United States Postal Service. Established in 1889, the organization advocates for workplace rights, contractual protections, and legislative priorities affecting its members. The union operates from its national headquarters in Washington, DC, and supports a nationwide network of local branches that serve carriers across all states and U.S. territories. Its responsibilities include addressing working conditions, compensation concerns, retirement issues, and occupational safety matters. The association also manages organizational functions such as branch coordination, national business agent support, and training initiatives. NALC is affiliated with the AFL-CIO and participates in broader organized labor efforts. The organization is privately held as a non-profit labor union.