'aussiehen' is normally a split verb, right? What are the rules for when to put 'aus' where it is in this sentence? I would have expected 'Es sieht wie das Haus meiner Großmutter aus '
That is correct too :)
'It seems like my grandmother's house' ?
'sieht aus' is a conjugation of the separable verb 'aussehen': 'to look' (as in you look pretty etc). So it looks like my grandmother's house.