This flat-topped earthen mound rises nearly three metres from its base, measuring 21 metres across at ground level and narrowing to 17 metres at its summit. Though now densely overgrown, archaeological testing in 2006 revealed a substantial ditch, over five metres wide and more than a metre deep, which likely marked the perimeter of a bailey that once accompanied this defensive structure.

The motte occupies a strategic position on a bluff overlooking the east bank of a stream that flows through Duncormick village. Its placement wasn’t arbitrary; the Norman lords who built it understood the value of controlling water access and maintaining sight lines across the surrounding landscape. The nearby church site, just 120 metres to the east, and a castle site 120 metres southwest across the river, suggest this was once a significant settlement node in medieval Wexford.

Historical records tell us that by 1247, the manors of Rosegarland and Duncormick were held jointly by Maurice de London, who owed military service of three and a quarter knights to his overlord. By 1324, this obligation had been reduced to three knights, but soon after, the manors were separated and Duncormick disappears from official records, apparently passing into the hands of the Meiler family. Archaeological investigations have uncovered traces of the wider settlement, including field systems to the northeast, a kiln, and house foundations near the modern road, painting a picture of a once-thriving medieval community centred around this imposing earthwork.