(also Crosshill) House stood on the east side of the Corsehill or Clerkland Burn and only a few remains were said to exist to show its site, however the 1860 OS indicates no ruins of any description and nothing now remains on the site (2015). Corsehill House is shown in one old print of 1791, drawn in 1789 by Grose with the comment that "At a small distance from this ruin are some small remains of a more ancient building belonging to the same family." referring to the old Corsehill castle whilst drawing Corsehill House, the home of the laird at that time. Substantial remains of Corsehill House were thought to exist until the railway was constructed and that most of the ruins were used to build the embankment with the course of the burn also being partly altered at this time, however a contemporary record states that the Corsehill House site had been entirely robbed by circa 1800. Armstrong's 1775 map clearly shows Corsehill as being on the east bank of the Corsehill Burn. The single section of tower wall that remains today (2020) of Corsehill Castle has had extensive consolidation works to stabilise it and this gives it its unusual appearance, accentuated by the existence of a fireplace and aumbry on the eastern side. The Ardrossan and Saltcoats Herald from 28.11.1863 records that "Much of its beauty as a ruin was unfortunately destroyed a few years ago. The proprietor, from an idea that it might fall or be blown over in a storm, very wisely gave orders to have it strengthened; but the mason who executed the work, either from a want of taste, or from ignorance, converted it into the pillar-like object that we can see at present". The proprietor in question was Sir Thomas Montgomery Cunningham of Corsehill whose wife restored the family monument in Kilmaurs's Glencairn Aisle. The dressed stone work blocks suggests that two phases of consolidation were carried out, possibly years apart. the lower level appears as possible robbed dressed ashlar from Corsehill House and the second phase is distinguished by a raised rectangular area, typically intended to empasise that this is not original work. A number of authors have assumed that the surviving remnant of the typical tower castle equates to a distinctive part of Grose's engraving however the thickness at nearly 3 metres and the other features such as the lack