The Quadrangle, former Her Majesty's Prison Northallerton

The Quadrangle is a prison complex of which this listing comprises the northern third, a group of four interconnected buildings arranged around a courtyard. The site originated in 1788 to a design by John Carr, though most of the surviving buildings date from 1818 to 1828, with some sections by George Atkinson. The complex underwent alterations in 1848 to 1852 by the North Riding surveyor of bridges, and extensive 20th-century alterations and additions. The listing excludes the Chapel Wing (the heavily altered original 1788 prison block) and the mid-19th-century Male Cell Block, while the mid-19th-century Female Cell Block to the east of the Governor's House is listed separately.

GOVERNOR'S HOUSE

The house is constructed of variable red brick laid predominantly in Flemish bond, with thinner browner brick in English bond to the rear. Stone forms the portico and window sills. The plan is double pile with a central stair hall.

The north entrance front is symmetrical with five bays arranged over two storeys, the ground floor being raised. A simple Tuscan portico marks the entrance. Above is a blind window, and the other windows feature gauged-brick flat arches with projecting stone sills. The roof is hipped and lacks chimney stacks. The two rear corners are curved, largely filled by large three-light windows with stone lintels and sills, originally designed to overlook the prison exercise yards flanking the Chapel Wing.

The interior retains a simply detailed staircase with a ramped and wreathed handrail set on stick balusters rising from a curtail step. Some modest original cornicing and joinery also survives.

1818 FEMALE WING

This building is constructed of thin mixed brown and red brick laid in English cross bond, with stone window surrounds featuring projecting sills and keystones.

The plan arranges both floors with a broad corridor along the western wall and cells and rooms on the eastern side. Stairs are located in the adjacent link building.

The exterior comprises two storeys. The west elevation has five regular bays of large lunette windows now containing later multi-paned timber windows. The upper floor of the east elevation contains seven smaller lunette windows. The north gable is rebuilt in modern brick following the demolition of the formerly attached courthouse. The northernmost bay facing the courtyard was formally an entrance with a stone surround, now blocked and reduced to a small lunette window. The window on the first floor above has been converted into a fire escape door. Additional doors have been inserted through the ground floor to the south.

The interior retains original iron bars of distinctive interlocking design on all windows. Ceilings are vaulted, and although some cells have been knocked through to form larger offices, the divisions remain readable. The northernmost cell on the ground floor, identified as a punishment isolation cell in 1877, retains 20th-century fittings that contribute to the special interest.

STAFF TENEMENT RANGE

The range is built of browny-red brick mainly in English garden wall bond with projecting stone window sills and a Welsh slate roof.

The external elevations suggest the building originally had two entrances in the eastern elevation with a principal staircase halfway along the range, though the interior has been extensively reconfigured.

The exterior presents three storeys across nine bays with scattered fenestration. Most windows have projecting stone sills and gauged brick flat arches. Central to the east elevation are two tall round-arched stair windows, the lower now partly infilled. The four ground-floor bays to the south have original round-arched openings, all now blocked: two were windows and two were doorways, with the southernmost originally the larger before being reduced to a window and then completely blocked. Both current entrances are modern insertions. The west elevation is more regular and lacks round-arched openings, with scarring to the brickwork on the ground floor marking the removal of attached outbuildings. The roof is shallow pitched and hipped with a large end stack at the north end standing to full height.

The interior has been extensively altered, but retains the original floor plates and the original roof structure of through-bolted kingpost trusses.

LINK BUILDING

This building is originally constructed of thin mixed brown and red brick in English garden wall bond, with original sandstone sills and lintels, though much later alteration in other brickwork and concrete replacements diminish special interest. The roof is Welsh slate.

The plan comprises an axial corridor with rooms to the sides and accesses through to adjoining buildings, with a 20th-century connection to the Governor's House of lesser interest.

The exterior is three storeys across five bays. Its ridgeline continues that of the attached 1852 Female Cell Block, though the link building is narrower with its north side wall set back to abut the south gable of the 1818 Female Wing, which covers most of the eastern three bays. A gap formerly between the link building's west gable and the Governor's House is now infilled in 20th-century work. Most window openings have been altered, reduced in width with new lintels. The roof retains a large tall ventilation chimney on its ridge, aligned with that of the 1818 Female Wing.

The interior has been generally altered and modernised, but retains an exposed jack-arched ceiling, with others possibly surviving concealed beneath modern dropped ceilings. This building provides access to the upper floor of the attached 1818 Female Wing, though the originality of this arrangement is uncertain.