Wall Extending NE from Upnor Castle Along the River Medway is a Grade II listed building in the Medway local planning authority area, England. First listed on 17 April 2009. Wall.

Wall Extending NE from Upnor Castle Along the River Medway

WRENN ID
vacant-passage-pearl
Grade
II
Local Planning Authority
Medway
Constituency
Rochester and Strood MP: Lauren Edwards (Lab)
Country
England
Date first listed
17 April 2009
Type
Wall
Address
Wall Extending NE from Upnor Castle Along the River Medway, Upnor Road, Frindsbury Extra
OS grid reference
TQ 759 707
Coordinates
51.40876, 0.52819
Source
Historic England listing

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

Description

The wall extending northeast from Upnor Castle along the River Medway is an early 19th-century structure made of brick with a stone coping. It features four blocked openings along its length. This wall was part of the seaward boundary of the former ordnance store at Upnor and is a prominent feature along the river. It is historically significant as it relates to Upnor Castle, which is a Scheduled Ancient Monument, and B Magazine, which has been recommended for listing due to its connection to ordnance yards. The wall originally had openings for powder piers that served floating magazines, which were important to the development of naval ordnance sites.

Local climate

Wall Extending NE from Upnor Castle Along the River Medway sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 84% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 74% of listed buildings.

It experiences an average of 23 freeze-thaw cycles a year, fewer than 76% of listed buildings. Of these, 11 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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  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Building Lu001 (Former B Magazine), Upnor Depot Grade II* 32 m
  2. WWI Sentry Post at the Lower Upnor Ordnance Depot Grade II 126 m
  3. Traverse to former Shifting House, Lower Upnor Ordnance Depot Grade II 142 m
  4. Upnor Castle Grade I 218 m
  5. Upnor Castle House Grade II 286 m
  6. The Barracks Grade I 301 m
  7. The Tudor Rose Public House Grade II 314 m
  8. Waterhouse Cottage Grade II 317 m
  9. Castle House and Albermarle Cottage Grade II 323 m
  10. Walsall House Grade II 331 m