You will be asked in your application form if you want your accomodation to be arranged by us. Our partner hotel is Rodina hotel which is very close to the congress area and to the center of the town. Cost: 20 EUR - double room 30 EUR - single room Here are some other hostels if You choose to arrange your accomodation personally: http://www.cheap-hostels-in.com/sofia.htm http://www.trav.com/cities/hostels/sofia.html