I think the answer is possibly. Certainly the frontage is added , probably built over what was a small bit of garden, or an open area. This happened a lot. The building might not have been wholly private however, as often , particulalry in the jewellery quarter but also elsewhere, buildings contained living accomodation with a workshop or business in the back, possibly as extra buildings (though the 1889 map shows that no 69 (second from the corner of Manchester st) was of similar outline then to that in 1951)
mike