Normally when referring to the building you use 'house'.
See e.g. :
this is a good question and the person who downvoted you isn't worth commenting on or acknowledging. they are certainly used interchangably in english. (source: native english speaker)
but for the sake of the course, it's probably best to try to separate the two. and if you get the answer wrong, whatever. it just means more practice, right? ;)
That said, many people would automatically use home here. It should be an alternative answer seeing as Polish does not make the distinction. Without wanting to sound too cheeky, we are learning Polish, not English. ;)