Navigation Mark, In rear garden of 12 The Square, Annalong, Newry, Co Down, BT34 4TS is a Grade B2 listed building in the Newry, Mourne and Down local planning authority area, Northern Ireland. First listed on 14 August 1981.
Navigation Mark, In rear garden of 12 The Square, Annalong, Newry, Co Down, BT34 4TS
- WRENN ID
- keen-column-mallow
- Grade
- B2
- Local Planning Authority
- Newry, Mourne and Down
- Constituency
- South Down MP: Chris Hazzard (SF)
- Country
- Northern Ireland
- Date first listed
- 14 August 1981
- Irish grid reference
- J 375 197
- Coordinates
- 54.10827, -5.89692
- Source
- NI Environment Agency listing
Description
This unusual structure, likely built between 1800 and 1819, is a significant landmark in the history of local navigation and the development of Annalong Harbour. It stands in the rear garden of 12 The Square, Annalong, Newry, Co Down.
The Navigation Mark is a whitewashed rubble masonry post, approximately 3.0 to 3.7 metres high with a circular cross-section. It tapers to an oversailing conical top, finished with a rounded boulder finial. A television aerial is now attached to the top.
Although not specifically depicted on Alexander Nimmo’s 1821 chart of Annalong Harbour, a line extends from the harbour entrance channel to this location, labelled ‘landing mark SE ¾ by compass’, suggesting the mark was present at that time. While it's possible the land mark was constructed later, perhaps by the Board of Works during harbour improvements in the 1840s, its origins likely predate this.
The structure possesses industrial archaeological interest and contributes to the group value of the area. It is of local interest, reflecting social, cultural and economic importance, and is notably rare. The ownership is private.
Local climate
Navigation Mark, In rear garden of 12 The Square, Annalong, Newry, Co Down, BT34 4TS sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 2 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- No flood data for this area
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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