Haus Union A warm welcome awaits you at the large, 3x000D star rated Haus Union in Oberhausen. Both on and off site car parking is available. Dining is available at the hotel, which has it's own restaurant. Business users are catered for with wifi and meeting facilities available at the Haus Union. Room Facilities Haus Union. Smoking is permitted in certain bedrooms (please specify when booking) and the public areas of the hotel. Additional Info. An airport shuttle service is available from the hotel. The hotel is pet friendly. A concierge service is provided for guests.