Grottos to West of Warmley House is a Grade II listed building in the South Gloucestershire local planning authority area, England. First listed on 15 July 1981. Grotto. 1 related planning application.
Grottos to West of Warmley House
- WRENN ID
- guardian-pavement-tarn
- Grade
- II
- Local Planning Authority
- South Gloucestershire
- Constituency
- North East Somerset and Hanham MP: Dan Norris (Ind)
- Country
- England
- Date first listed
- 15 July 1981
- Type
- Grotto
- Address
- Grottos to West of Warmley House, Tower Road North, Siston, BS30 8XN
- OS grid reference
- ST 668 728
- Coordinates
- 51.45384, -2.47803
- Source
- Historic England listing
Description
The grottos located to the west of Warmley House date from the mid to late 18th century. They are visually appealing and likely served more than just an ornamental purpose. The walls and vaults are lined with black slag material. The central area, which was formerly domed, features four recesses and four axial chambers or tunnels; one of these tunnels is double to the east, while another to the west leads to an icehouse with an exit in the garden. Two of the vaults have pointed barrel shapes.
To the west, there is a wall that likely supported hothouses. This wall is approximately 15 feet high and about 40 feet long, with a slight return to the southwest. It contains four blocked arches filled with patterned brick and slag. There is an arched doorway on the right with a brick head, while a similar doorway on the left now has a wooden lintel. Associated derelict walls extend as far as a tree-clad tumulus. The grottos support the terrace to the west of Warmley House.
Local climate
Grottos to West of Warmley House receives an average of 840 mm of rain a year. This makes it wetter than 56% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 60% of listed buildings.
It experiences an average of 34 freeze-thaw cycles a year, fewer than 52% of listed buildings. Of these, 14 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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- No EPC on record for this property
- No sale records on file
- Related listed building consents — 1 application
- 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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