Records from 1297 and 1309 mention Philip de Prendergast’s legal dispute with H. de Capella over the lands of Acmys or Akynnys, an early reference to what would become known as Creggane. By 1583, the site was recorded as Castle Creggan in various administrative documents, whilst the 1654-6 Down Survey map depicts a tower house standing within a square bawn, owned at that time by John Supple, an Irish Catholic landowner. The 1659 Civil Survey provides a vivid snapshot of the property’s condition, describing ‘a Castle and a Bawne out of repaire and an orchard on the p'[re]misses’.

The castle underwent significant alterations in 1840 when it was lowered and given a new roof by Mr. Hutchins, who incorporated the medieval structure into his dwelling house. According to the Ordnance Survey Letters from that period, the modified castle measured 34 feet by 26 feet externally, with walls five feet thick and approximately 45 feet high after the reduction. The building contained three storeys, with the ground floor featuring distinctive medieval vaulting. This blending of old and new was typical of the period, when many landowners sought to preserve ancient structures whilst adapting them for modern living.

Today, only fragments of the medieval castle survive above ground; the western end of the south wall and the western wall still stand as testament to the building’s long history. The 18th century house that now occupies the site, marked as Creggane Castle on Ordnance Survey maps, has been heavily altered over time. Archaeological evidence suggests the original tower house was more substantial, with the 1897 Ordnance Survey map showing it as a rectangular structure at the centre of a range of buildings. Despite its reduced state, the remaining masonry preserves features like loops and evidence of second storey vaulting, offering tangible links to medieval Limerick’s defensive architecture.