Many of the "over and under" houses or "double decker" or “top and bottom” houses in Hebden Bridge are legally referred to as "flying freeholds". Wikipedia describes them as:
Flying freehold is an English legal term to describe a freehold which…
The Manchester and Leeds Railway (later the Lancashire and Yorkshire) opened the Normanton to Hebden Bridge section of a line to Manchester in 1840. This station building dates from 1893 but was renovated in the Lancashire and Yorkshire Railway style…