The North Warehouse was built in the mid-19th century. It stands between the River Exe (on the pictures) and Exeter's Canal Basin and opens onto the latter. The basin opened in 1830, five years after work on the extension and widening of the Exeter Canal was completed.
In 1969 Exeter's Maritime Museum opened in the North Warehouse and the adjacent building but it closed down in 1997.
Unfortunately I haven't found any information about the previous occupiers of the building.
Location: Haven Banks, Exeter, Devon / Pictures taken in April 2012