Lyn,
It looks to me you are right,the house my gt.gran lived in was the one you said.
The house I first thought would have been the living quarters for the gaffer of the pub,remember it's address was Brearley St.not Summer Lane and the step had two risers in your photo.No.2,but not in todays photo.
Now,as I cannot see the cellar head or a dropping hook,my guess would be, it was a gravity pull,(the beer goes to the top floor).If this is the case the building between the two homes,was where the pulley was,and also for bottle storage.
Perhaps gt.granny did move her chair closer to the pub,then on the other hand,she could have been the bouncer,she only had one complete hand, she had an accident on a power press when she was 13 years old,but my dad reckons even the stump was deadly.
Thanks for all your efforts bab.
ray.