Welcome to Three Boroughs Housing Cooperative Three Boroughs is a fully mutual housing cooperative based in Southeast London. We are managed by our members in the form of a committee elected at the AGM. We act as managing agents for a number of Housing Associations operating in the boroughs of Lewisham, Southwark and formerly, Greenwich. ... <a title="Home" class="read-more" href="https://threeboroughs.org.uk/" aria-label="Read more about Home">Read more</a>