When builders discovered an underground shopping arcade in Keighley, much of the Victorian building work on the cellars of seven shops was still intact, while wooden shop-fronts and stable pens were in place.
Constructors also found doors, signs and fittings from some of the original shops in the street, which was then owned by Frank Booth and Mark Holroyd.
Now Nick Holroyd, manager of the Royal Arcade, which is above the discovery, is investigating whether the street - once at ground level - can be restored.
He has enlisted an architect and structural engineer - and plans are being made to develop the street, which has space for up to eight units.
More top news
Tuesday morning weather: Bright spells. Mainly dry.
Weather tonight: Showery outbreaks of rain.
The victim, a Leeds woman aged in her fifties, was walking her animal along Bootham in York on Friday evening at around 8pm.