Most of the rooms are doubles, but if you travel alone and do not want to share, you can request a double room for single use. So you can have double the closet and desk for you alone: D.
This building, located in Sants-Les Corts, a few meters from the metro stop Sants Estació (Lineas 3 and%). It is the line that goes directly to the University Zone and you are only 4 stops, so you will not waste time on long journeys or transhipments.
The student building has apartments with 2 or 4 bedrooms, and the best, two fantastic penthouses with terrace, the most desired product in a city like Barcelona, where most of the year makes a very pleasant climate that allows you to live in the Exterior.
If you are still looking for room with bathroom for your study stay in Barcelona, the apartments for students of Robrenyo street are a highly recommended option. Here you have more information: http://www.barcelona-student-housing.com/robrenyo-a-en-barcelona-21-en.html