There are 3 hotels in Roskilde
Zleep hotel, Scandic hotel and Comwell hotel
Danhostel Roskilde is placed at the habour in Roskilde.
Since there are not that many hotels near Roskilde you will probably need to book in the nearest future.
Please use DTU as reference when you book your hotel room.
For further information, please take a look at Visitroskilde.dk
If you want to stay in Copenhagen, please take a look at visitcopenhagen.dk