Hi, Welcome to OpenStreetMap.

Reviewing your mapping as requested I can see a few inadvertent mistakes. 

The garages are crossing over each other, (warning given above). I think there would only be two garages, one for each house.

The two houses north of the garages look to be semi-detached, so they should be joined at the party wall.

The three other buildings tagged as building=house actually look like three pairs of semi-detached houses. So they are not a single residence, mapped thus the tag should be building=residential. If the building is split forming the two residences then each should be tagged building=house and house=semi-detached could also be added if desired.

If you need help please just ask.
Regards Bernard.