The rectangular tower, measuring approximately 9 metres north to south and 7 metres east to west, dates likely to the 16th or 17th century. Its limestone walls, though partially collapsed, still reach impressive heights of up to 6 metres at the corners, offering visitors a tangible connection to Ireland’s turbulent past when such fortified dwellings were essential for local landowners.

The castle’s current state reveals both its original construction and centuries of decay. While the exterior walls remain relatively intact, particularly at the corners, the interior dividing walls have fared less well, standing only 2 to 3 metres high. Breaches in the southern and western walls have been partially repaired with dry stone walling, though when these repairs were made remains unclear. Notably absent are any decorative architectural features or dressed stonework, suggesting this was a functional defensive structure rather than an elaborate residence. Mounds of loose stone both inside and outside the walls hint at the gradual collapse of upper storeys and internal structures over the centuries.

Adjacent to the castle’s eastern wall, the remnants of a small walled enclosure can still be traced, measuring roughly 13 metres by 7 metres. This addition, now largely levelled, appears to post-date the main tower and was likely constructed after 1700, possibly serving as a bawn or courtyard area. The site appeared on the 1913 Ordnance Survey map marked as “Stremmingstown Castle (in ruins)”, indicating it had already reached its current ruinous state by the early 20th century. Today, the castle stands alone in its field with no other earthworks or defensive features visible in the surrounding landscape.