Grotto in the Grounds of Mahebourg is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 28 August 1987. Grotto. 2 related planning applications.

Grotto in the Grounds of Mahebourg

WRENN ID
calm-buttress-hawk
Grade
II
Local Planning Authority
Cornwall
Constituency
South East Cornwall MP: Anna Gelderd (Lab)
Country
England
Date first listed
28 August 1987
Type
Grotto
Address
Grotto in the Grounds of Mahebourg, Luxulyan, PL30 5EF
OS grid reference
SX 050 581
Coordinates
50.3912, -4.74421
Source
Historic England listing

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

Description

The grotto in the grounds of Mahebourg is a structure dating from around 1780. It is made of granite and features shell decoration. The grotto has a round arch over a seat, with the front of the arch faced with black volcanic pebbles. The stone roof is built against a granite boulder at the back. Inside, there is a pattern of ormer shells with graded colored pebbles in red and black. The seat has a sloping back, adorned with a star pattern made of shells and large conch shells along the top. This grotto was once part of the Vicarage garden, now known as King's Acre, which is a separate property. Its style is similar to the Shell Seat at Mount Edgcumbe Country Park.

Local climate

Grotto in the Grounds of Mahebourg sits in a wetter-than-average part of the UK, with an average of 990 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.

It experiences an average of 10 freeze-thaw cycles a year, fewer than 91% of listed buildings. Of these, 4 follow 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
  • Related listed building consents — 2 applications
  • 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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