The crenellations were added as a folly, a fashionable eighteenth or nineteenth century affectation, long after the building had ceased to function as a windmill. The result is a structure that has been at least two things in its lifetime and now reads as neither quite one nor the other.

The tower itself is a solid piece of work: a cylindrical shell with an external diameter of 4.65 metres and walls thick enough to leave an interior of just 3.15 metres across, spread across three floors. Two opposing doorways were cut into the northwest and southeast faces, though the southeastern one was later converted into a pointed window, narrowing to 0.74 metres wide. Inside, steps protrude from the south wall near the northwest entrance and climb to the second floor, emerging on the northeast side. The ground floor retains box niches in the south and southwest walls and what appears to be a recess or ledge on the northeast side, likely related to the original milling machinery. Upper floor joists were set directly into the masonry rather than supported on timber plates, a detail that tells something about how the building was put together. By 1839, when the first edition of the Ordnance Survey six-inch map was produced, it was already being recorded as a stump, a word that implies the sails and cap were long gone. A windmill at Bargy does appear in the Civil Survey of 1654 to 1656, where it is listed among the property of one William Rossiter, but the structure standing today is thought unlikely to be the same building. Approximately 170 metres to the northeast sits Bargy Castle, making this a corner of Wexford with a notable concentration of old stonework in a quietly unremarkable stretch of countryside.