The Green Hall is in one of the buildings located in Christiania Freetown, an icon of hippie life in Copenhagen. Alongside a fantastic variety of self-built homes, the Green Hall is a multi-purpose timber shed, housing a recycling centre where Christiania residents can get the most of their building material. Also doubling as a craft centre for kids, and an evening concert hall.

While not solely a buildings materials resource centre, nor focused on reused materials, the Green Hall integrates these into its wider alternative supermarket, with new as well as re-cycled materials available alongside fuel, hardware, office supplies, work clothes, hobby materials, sewing materials, used clothes, Christiania merchandise re-cycled furniture and much more.