Ancient Monuments

History on the Ground

This site is entirely user-supported. See how you can help.

Thomaston Castle

A Scheduled Monument in Girvan and South Carrick, South Ayrshire

More Photos »
Approximate Location Map
Large Map »

If Google Street View is available, the image is from the best available vantage point looking, if possible, towards the location of the monument. Where it is not available, the satellite view is shown instead.


Latitude: 55.348 / 55°20'52"N

Longitude: -4.7776 / 4°46'39"W

OS Eastings: 223978

OS Northings: 609515

OS Grid: NS239095

Mapcode National: GBR 43.547D

Mapcode Global: WH2Q6.LT5Z

Entry Name: Thomaston Castle

Scheduled Date: 7 December 1998

Source: Historic Environment Scotland

Source ID: SM7865

Schedule Class: Cultural

Category: Secular: castle

Location: Kirkoswald

County: South Ayrshire

Electoral Ward: Girvan and South Carrick

Traditional County: Ayrshire


The monument comprises the substantial remains of a large L-plan castle probably dating from the beginning of the 16th century and believed to have been built for the family of Corry of Kelwood. It is said to have been inhabited until ca. 1800.

A small, square staircase tower stands in the re-entrant angle and rises to a corbelled-out parapet. An arched pend, still extant, leads through the smaller wing and would once have given access to the courtyard and, from the courtyard, to the main entrance in the stair tower. The basement floor contains four vaulted cellars in the main block and one in the wing.

The first floor appears to have been divided into a hall and private room in the main block, and a bedroom in the wing. Archaeological survey and monitoring undertaken during work to insert a pipeline to the W of the castle in 1997 revealed the presence of wall footings, one of which may be interpreted as comprising part of the castle's barmkin wall.

The area to be scheduled is nearly square in shape with maximum dimensions of 80m NE-SW by 80m NW-SE to include the castle and an area of ground around it within which associated remains are believed to survive. From the N-most point of the scheduled area the boundary runs along the W side of a stone boundary wall for 30m. The wall itself is excluded from the scheduling.

The scheduling boundary then runs for 3m along the S side of an adjoining wall. This wall too is excluded from the scheduling. The boundary then runs SE for 30m at a distance of 2m from the buildings which lie to the E of the castle. It then continues on the same orientation for a further 20m until it meets the field boundary which runs parallel to the road.

The boundary follows the line of the field boundary for 85m before turning NW for 80m. It then turns NE for 70m to meet the starting point. The area is marked in red on the accompanying map extract. Excluded from the scheduling are the pheasant runs which lie to the NW of the upstanding remains and the fence which lies to the W.

Source: Historic Environment Scotland

Statement of Scheduling

The monument is of national importance as the substantial remains of a 16th-century L-plan tower house which retains considerable potential to enhance our knowledge of Scottish domestic architecture of that period.

Source: Historic Environment Scotland




Davis, M. C. (1991) The Castle and Mansions of Ayrshire, 388.

MacGibbon, D. and Ross, T. (1889) The Castellated and Domestic Architecture of Scotland, Vol. III, 289-90.

Source: Historic Environment Scotland

Other nearby scheduled monuments is an independent online resource and is not associated with any government department. All government data published here is used under licence. Please do not contact for any queries related to any individual ancient or schedued monument, planning permission related to scheduled monuments or the scheduling process itself. is a Good Stuff website.