Plasterers' Local Union No. 31 is currently affiliated with many organizations including:

  • AFL - CIO
  • Pennsylvania Building & Construction Trades Council
  • North Central Pennsylvania Building & Construction Trades Council
  • Great Lakes Building & Construction Trades Council
  • Southwestern Pennsylvania Building & Construction Trades Council
  • Pittsburgh Building & Construction Trades Council
  • Beaver County Building & Construction Trades Council
  • Altoona Building & Construction Trades Council
  • Butler & Venango Counties Building & Construction Trades Council
  • Johnstown Building & Construction Trades Council
  • Lawrence County Building & Construction Trades Council
  • Mercer County Building & Construction Trades Council
  • Central Labor Union & Industrial Union Council
  • Builders Guild
  • Pennsylvania Apprentice Coordinators Association
  • O.P & C.M.I.A. Tri - State Conference
  • O.P & C.M.I.A. North East Conference
  • O.P & C.M.I.A. Ohio State Conference
  • International Foundation for Employee Benefit Plans
  • Foundation for Fair Contracting