Cassillis House is a Grade A listed building in the South Ayrshire local planning authority area, Scotland. First listed on 14 April 1971. Castle. 5 related planning applications.
Cassillis House
- WRENN ID
- dim-pinnacle-curlew
- Grade
- A
- Local Planning Authority
- South Ayrshire
- Constituency
- Ayr, Carrick and Cumnock MP: Elaine Stewart (Lab)
- Country
- Scotland
- Date first listed
- 14 April 1971
- Type
- Castle
- OS grid reference
- NS 340 128
- Coordinates
- 55.3812, -4.62099
- Source
- Historic Environment Scotland listing
Description
Cassillis House is a 14th century quadrilateral keep that underwent significant alterations in the 17th century, including the addition of a tower at the southeast corner, which houses the staircase and entrance doorway. During this period, the upper part of the building was also remodeled. In the Victorian era, a large addition in a baronial style was attached to the castle on the southeast side.
Local climate
Cassillis House sits in one of the wettest parts of the UK, with an average of 1,520 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 10 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- Related listed building consents — 5 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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