There is an available room for one person (single bed). Residencial area located in the north of the city, 10 minutes walking from Park Guell and bunkers of Carmel. The flat is located just in front of metro station Carmel (it's 25 minutes far from downtown).
It's a residencial area with metro and bus connection. 25 minutes far from downtown. All needed shops are available in the area however is a quiet place with no nightlife.
Best option is metro (faster than bus) but there are bus lines to downtown. There is also a night bus line.