Whilst this early arrival lacks solid evidence, the family certainly established themselves at Ballywich and Rathaspick, their original fiefs, before acquiring the manor of Carne, sometimes called Maliordocke, possibly through marriage. The estate at Carne was held by various owners including Geoffrey de Karrn in 1247 and the Rochforts around 1425, but by the late 15th century, the Codd pedigree at Carne was firmly established. They maintained ownership through nine generations, weathering religious upheaval when Martin Codd converted to Protestantism in 1609, and surviving the Confederate Catholic confiscations of 1641 when Nicholas Codd fled to Wales, only to have his lands restored under Cromwell’s Commonwealth.

In 1712, the last Codd owner, Nicholas, sold the 950 acre estate to Colonel Thomas Palliser, a Yorkshireman who’d served in the Williamite army in Ireland and was nephew to the Archbishop of Cashel. Palliser, who already owned Portobello House at Campile on Great Island, lived at Castletown until his death in 1756. The estate passed through his descendants, including his grandson Philip and eventually to Admiral Hugh Palliser, Thomas’s nephew who died in 1796. The Pallisers built Castletown House, a five bay, two storey building that cleverly incorporated the medieval tower house into its western wing; the design echoed their other property, Castlepaliser House, which was completed around 1780.

Today, only the ground and first floors of the original tower house survive, measuring approximately 9.45 metres east to west and 8.65 metres north to south. The structure retains impressive defensive features including a granite lintelled doorway with a murder hole above it in the entrance lobby, operated from the now destroyed second floor. The ground floor chamber, accessed through a doorway with a projecting drawbar stone, contains multiple embrasures that once served as defensive positions; two of these were later converted to doorways when the Pallisers integrated the castle into their mansion. A mural staircase winds through the eastern and southern walls, leading to the first floor which sits beneath an east to west barrel vault, now plastered but still showing traces of its medieval origins. About 165 metres southeast stands the parish church, completing this historic landscape that witnessed centuries of conquest, religious change, and architectural adaptation.