21109 Hamburg-Wilhelmsburg: The International Building Exhibition IBA Hamburg is one of the largest urban development projects in Europe. To date, 70 projects have been realised as part of IBA Hamburg. In 2013, IBA Hamburg had a total of 1,733 apartments under construction or completed, 516 of which were modernizations. Added to this are over 100,000 square metres of commercial space, eight educational facilities, two senior citizens' residential homes, three daycare centres, four sports facilities, a commercial courtyard, a centre for artists and creative people, the extension of the Aßmann Canal and over 70 hectares of green space.