We know that the rents in Freiburg are very high, compared to other parts of Germany. To help you to find a suitable room for your stay in Freiburg, check the following:

-Studierendenwerk (residental halls) www.swfr.de

-shared flats: www.wg-gesucht.de

-single apartments: www.immobilienscout24.de

Additionally, it's always good to check out the larger facebook groups about accomodation in Freiburg!