Female Cell Block, former Her Majesty's Prison Northallerton

The Female Cell Block at the former Her Majesty's Prison Northallerton is a prison wing originally designed for women, which opened in 1852.

The building is constructed from thicker, browny-red brick, laid in English bond, with sandstone sills and lintels, and features a Welsh slate roof. The layout includes an axial central well that was originally open to the roof, with galleried walkways providing access to the cells on either side. Staircases are located at the west end.

The exterior consists of three storeys with eight regular bays, each featuring nearly square cell windows. The east gable wall has three centrally positioned windows on the first, second, and attic storeys, along with an inserted doorway at ground level. The original entrance to the wing is through the Link Building attached to the east gable.

Inside, the cell block has seen relatively little alteration and retains its original cells, which are accessed via sandstone slab gallery walkways supported by cast iron brackets and columns. There are also cast iron staircases connecting the levels, and the simple iron railings are believed to be original. However, the natural light in the central well is now mostly blocked by a lift shaft and fire escape staircase added in the 20th century, which are not considered of special interest. The well has been floored over at the attic level, and the attic, which still has exposed roof trusses, has been subdivided into offices with modern stud partitions that are also not of special interest.