This rectangular earthwork measures approximately 38 metres from north to south and 30 metres from east to west, its boundaries still visible as slight banks that rise above the surrounding landscape. The site retains its defensive moats on three sides; the northern, eastern, and western edges, with the northern moat reaching depths of up to 2 metres. Only the southern side lacks these characteristic water-filled ditches that once provided both defence and drainage for the medieval settlement within.

These moated sites are distinctive features of the Irish medieval landscape, particularly common in the eastern counties where Anglo-Norman influence was strongest from the 12th century onwards. They typically enclosed farmsteads or small manor houses, with the moats serving multiple purposes: deterring cattle thieves, managing water drainage, and marking the social status of their inhabitants. The Rochestown example, though now overgrown, preserves the classic rectangular plan that characterises these settlements, with moats ranging from 2 to 5 metres in width.

First documented by Barry in 1977 and later included in the Archaeological Inventory of County Wexford published in 1996, this site represents one of many such earthworks scattered across the county. While time and vegetation have softened its edges, the clear definition of the banks and the preservation of the moats on three sides make this a particularly well-preserved example of medieval settlement patterns in southeast Ireland.