The current building is actually three structures in one: at its core lies a medieval tower house, wrapped within a late 17th or early 18th century mansion, which was then extended with an early 19th century addition to the south. The tower house’s thick walls, measuring over a metre in width, survive to varying heights; the east wall reaches up to the second floor, whilst only fragments of the north and south walls remain. What makes this structure particularly intriguing is the unusual base batter on the north wall, which rises gradually to about five or six metres and was cleverly extended around the later building to create visual harmony between old and new.

The site has deep roots in local history, with the Ormond Deeds recording a Dermot mc Conoghor McTeig of Mobernan witnessing a land grant in 1544. By 1640, according to the Civil Survey, the property belonged to Teig Carran, described as an ‘Irish Papist’, and featured a small castle already in need of repair. The Carran family’s prominence is further evidenced by a 1635 wall monument in Fethard’s Augustinian abbey, commemorating Catherine Carran of Mobarnane and her husband Richard Wale. The basement of the later house, which notably stops short of the tower house area, contains a chamfered mullion fragment, whilst medieval masonry with distinctive tooling appears throughout the surrounding farm buildings, silent witnesses to centuries of continuous occupation.

The landscape around Mobernan is dotted with archaeological features that speak to its long settlement history. Three ringforts lie within 500 metres of the house, suggesting this area has been significant since the early medieval period. Today, the multi period structure stands as a remarkable example of how Irish buildings evolved over time, with each generation adapting and incorporating earlier structures rather than demolishing them, creating a architectural palimpsest that charts the changing fortunes and fashions of rural Irish gentry from the medieval period through to the 19th century.