Hello Jad,
although I agree to Julia's remark (do you need a house or just a room, or did you mean you need only a room but this room should be in a small house and not in a high-rise building?) you could start an apartment retrieval in Berlin here:
Wohnungen für Flüchtlinge
Beratung und Vermittlung
Turmstr. 21, Haus K
10559 Berlin (Moabit)
bit.ly/1sExC9J
Flat sharing in Berlin
bit.ly/1sExQO2
Kind Regards, Jan