I am phd student (Mathematics), looking for accommodation well conected with the Instituto superior tecnico.

I am a Ph.D. student in mathematics (last year). I am looking for accommodation for my research stay in the Instituto superior tecnico (25/set/2017-- 25/jan/2018). I will spend at least 8 hours per day in the university, thus I prefer to be in a quiet and clean place. I need a room with double bed and private bathroom because my wife (who is also a Ph.D. student) will visit me one weekend per month. Usually, I prepare my food on the weekend, thus I will need space into the freezer to keep 5 tupperware. I don't smoke and I don't have a pet. I speak Portuguese, Spanish and English.