Camellia or Round House is a Grade II listed building in the West Northamptonshire local planning authority area, England. Greenhouse.

Camellia or Round House

WRENN ID
endless-parapet-larch
Grade
II
Local Planning Authority
West Northamptonshire
Constituency
South Northamptonshire MP: Sarah Bool (Con)
Country
England
Type
Greenhouse
Address
Camellia or Round House, Castle Ashby Park
OS grid reference
SP 863 589
Coordinates
52.22207, -0.73786
Source
Historic England listing

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

Description

The Camellia or Round House is a greenhouse built in the early to mid-19th century. It is constructed from dressed limestone, cast iron, and glass, featuring a rectangular shape with an apsed entrance end. The central door is flanked by Tuscan pilasters, and the glazed bays are separated by piers that have similar pilasters. An entablature and blocking cornice adorn the structure, while pineapple finials are positioned on the parapet at the apsidal end and at either end of the roof ridge. Inside, the roof is supported by cast-iron columns. This greenhouse is located in an Italian garden, although it predates the current layout of the garden. Castle Ashby park and gardens are recognized in the Historic Buildings and Monuments Commission Register of Parks and Gardens for Northamptonshire at Grade I.

Local climate

Camellia or Round House sits in a drier-than-average part of the UK, with an average of 710 mm of rain a year. This makes it drier than 89% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 87% of listed buildings.

It experiences an average of 36 freeze-thaw cycles a year, more than 60% of listed buildings. Of these, 16 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
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  • 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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