Bastion Behind No. 50 and Wall Attached is a Grade I listed building in the County Durham local planning authority area, England. First listed on 10 March 1988. A Late medieval Fortification.

Bastion Behind No. 50 and Wall Attached

WRENN ID
lost-garret-burdock
Grade
I
Local Planning Authority
County Durham
Constituency
City of Durham MP: Mary Kelly Foy (Lab)
Country
England
Date first listed
10 March 1988
Type
Fortification
Period
Late medieval
Address
Bastion Behind No. 50 and Wall Attached, Saddler Street, City of Durham
OS grid reference
NZ 274 423
Coordinates
54.77549, -1.57506
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The bastion behind No. 50 and the attached wall is a late medieval structure, likely part of the castle wall. It is constructed from coursed squared sandstone with ashlar dressings. The bastion stands two storeys high with a round north wall and features a high four-course chamfered plinth. There are stone side steps located behind No. 2 Owengate that lead to a first-floor door with a chamfered Tudor arch. The parapet above has sloped coping.

Inside, the bastion includes round-headed openings on three north faces and a chamfered Tudor arched door at the rear, which is set under a corbelled brick arch within the thickness of the wall.

Local climate

Bastion Behind No. 50 and Wall Attached receives an average of 790 mm of rain a year. This makes it drier than 58% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 96% of listed buildings.

It experiences an average of 41 freeze-thaw cycles a year, more than 79% of listed buildings. Of these, 24 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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