I just read that the HHL has been given a building which previously housed one of the faculties of the university of Leipzig: http://media.fundsters.de/media/1153/hhl_newcampus_english_version.pdf The school is raising money to refurbish the new building. I was at HHL around ten years ago (I have a certificate in entrepreneurship from them) and I'd guess the new building doubles the size of the school.