Ha Ha Wall Around Mausoleum is a Grade II listed building in the Northumberland local planning authority area, England. First listed on 15 July 1987. A C18 Ha-ha wall.

Ha Ha Wall Around Mausoleum

WRENN ID
narrow-pilaster-crag
Grade
II
Local Planning Authority
Northumberland
Constituency
Cramlington and Killingworth MP: Emma Foody (Lab)
Country
England
Date first listed
15 July 1987
Type
Ha-ha wall
Address
Ha Ha Wall Around Mausoleum, Seaton Valley
OS grid reference
NZ 328 765
Coordinates
55.08198, -1.48751
Source
Historic England listing

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

Description

The ha-ha wall around the mausoleum at Seaton Delaval Hall dates from around 1766. It is constructed of rock-faced stone and forms a circular enclosure around the mausoleum. The wall stands 3 metres high and features an overhanging square coping. To the west, there is a large slab that marks the location of the former bridge access.

Local climate

Ha Ha Wall Around Mausoleum receives an average of 770 mm of rain a year. This makes it drier than 63% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 80% of listed buildings.

It experiences an average of 22 freeze-thaw cycles a year, fewer than 77% of listed buildings. Of these, 12 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. Ha Ha Wall to South of the Old Vicarage Grade II 329 m
  2. The Old Vicarage and Attached Walls Grade II 345 m
  3. Former farmbuilding ranges to north and east of Lookout Farmhouse Grade II 360 m
  4. Garden Walls to North, East and South of Walled Garden Grade II 388 m
  5. Coach House and Attached Yard Walls to East of Seaton Delaval Hall Grade II 556 m
  6. The Hall Grade I 572 m
  7. The Dene Cottage Grade II 585 m
  8. Primrose Cottage Grade II 606 m
  9. Church of Our Lady Grade I 633 m
  10. Statue of Samson Slaying Philistine in Garden to West of Seaton Delaval Hall Grade II 642 m