The rectangular structure, measuring approximately 10 metres north to south and 17 metres east to west, was built with thick walls of about 1.5 metres that featured a pronounced base batter; a sloping foundation designed to deflect attacks and strengthen the structure. Inside, a cross wall divided the castle into two distinct areas, whilst the eastern side appears to have had an attached bawn wall, creating an enclosed courtyard typical of Irish tower houses.

The church itself sits on the site of an ancient abbey founded by St. Illand in the sixth century, positioned on a slight rise that commands extensive views of the surrounding countryside. Though poorly preserved, the rectangular church likely dates from the late medieval period, making it contemporary with the nearby tower house. During recent renovations to the graveyard, archaeologists discovered evidence of the original enclosure that once surrounded the church, though a modern pathway to the south has since replaced this historic boundary.

One of the most intriguing surviving features is a decorated stone set into the graveyard wall, bearing the remnants of what was once a pair of ogee headed niches with hollowed spandrels, framed by a punch dressed border. This architectural fragment likely served as an aumbry, a small cupboard used to store sacred vessels in medieval churches. Unfortunately, well-intentioned but heavy-handed local restoration work has obscured many of the original features of both the church and its possible enclosure, making it difficult to fully appreciate the site's medieval character. The entire complex has been under a preservation order since 1986, recognising its significance to Ireland's architectural heritage.