Fraser Bond are the leading lettings and property management agents for Sea Containers House - London SE1. Sea Containers House is a 224,000sq ft office and leisure building in London SE1. Mondrian London at Sea Containers opened here in September 2014. The hotel has a rooftop bar in a glass box structure with outdoor terrace, featuring panoramic views over London. The interiors in 2014 were designed by British designer Tom Dixon, who wanted to capture the essence of the original building, exuding 1920s cruise ship glamour. HISTORY Sea Containers House was originally built as a hotel but became an.