It looks like all the buildings do face a consistent direction. It seems like rotating the scope -90 deg before inserting the model might make the door face the street front. However, a better solution would be to rotate the model 90 deg so that the x axis is along the back of the house and the z axis is along the left side of the house, and then resave the dae file.
Note: After a block subdivision, the scopes of the lots are such that the x axis is in the direction of the first street front edge (that is, one of the edges that touches a street) but positioned at the back of the lot. The z axis is perpendicular to it and points towards the street front edge.