Undercroft beneath 3, Queen Street, Norwich

The undercroft beneath 3 Queen Street in Norwich is a 15th-century brick structure. It is entirely below ground and situated beneath a late 20th-century commercial building, which is not of special architectural interest and is not included in the listing.

Access to the undercroft is provided from the ground floor of the building above, via a winder stair within a circular stair turret, one of only two known in the city. The turret's opening at the basement level features a Tudor arch with right-angled depressions on either side, indicating that a door may have been inset there at one time. The undercroft itself has an irregular rectangular shape, measuring approximately 7 meters by 7.5 meters. A modern breeze block wall runs across the center from west to east, with a central opening. The roof is designed as a slightly pointed barrel vault.

To the north, there is a low arched recess, above which is a rectangular window-sized recess, and a small arched niche is set into the wall to the west. The south wall also features a rectangular window-sized recess.

It is noted that the part of 3 Queen Street above the undercroft is not of special architectural or historic interest. The undercroft has been mapped as accurately as possible using survey and office plans, with some allowances made for the thickness of medieval walls and the depth of recesses.