Althorp, Ha Ha on North and West of Garden is a Grade II listed building in the West Northamptonshire local planning authority area, England. First listed on 8 November 1984. Ha-ha.

Althorp, Ha Ha on North and West of Garden

WRENN ID
secret-gateway-curlew
Grade
II
Local Planning Authority
West Northamptonshire
Constituency
Daventry MP: Stuart Andrew (Con)
Country
England
Date first listed
8 November 1984
Type
Ha-ha
OS grid reference
SP 680 651
Coordinates
52.28027, -1.00332
Source
Historic England listing

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

Description

Althorp features a ha-ha located on the north and west sides of the garden, dating from the 19th century. It is constructed of limestone ashlar, with coursed rubble and brick, likely designed by W.M. Teulon. The ha-ha includes a balustrade with panelled stone insets and piers at the corners and ends. At the junction of the north and west walls, there is a raised area with two broad flights of steps that are flanked by the balustrade.

Local climate

Althorp, Ha Ha on North and West of Garden sits in a drier-than-average part of the UK, with an average of 740 mm of rain a year. This makes it drier than 76% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 76% of listed buildings.

It experiences an average of 38 freeze-thaw cycles a year, more than 71% of listed buildings. Of these, 18 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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