Yes I would agree, looking at the trades of the people I expect it was high density, back to back housing.
Norah and William must have lived there for about 2 years - after getting 'together' and the birth of their first child.
I will try to see if there are any more likely Williams in the area in 1871 because having researched quite a bit at Worcester and not yet coming up with much, I keep thinking that the 'Worcester' on the 1881 Census could have been a mistake, or a lie.
Oh dont you just love the William Williamses?? I think this name should be banned from ever being used again.

Sue