This particular fortification was among the '18 or 20 ruinous remains of small castles or defensive towers' that met their fate around 1747, when Lord Limerick reportedly ordered their removal. Whether motivated by concerns about public safety, a desire to modernise the landscape, or perhaps to prevent these structures from becoming hideouts for outlaws, this wholesale clearance marked the end of an era for these medieval remnants.

Tower houses like Mortimer's Castle were a distinctly Irish solution to the turbulent conditions of the late medieval period, particularly from the 15th to 17th centuries. These vertical stone fortresses served as both residence and stronghold for the lesser gentry and prosperous merchants who couldn't afford larger castles but still needed protection in uncertain times. Typically rising three to six storeys, they featured thick walls, narrow windows, and often a single entrance at ground level that could be easily defended. The Townparks example would have been typical of its type; a compact yet formidable structure that balanced domestic comfort with military necessity.

The archaeological record of Mortimer's Castle, documented in the Archaeological Inventory and Survey of County Louth from the 1980s and 1990s, provides tantalising glimpses of what once stood here. Researchers O'Sullivan and Gosling pieced together fragments of its history from various sources, though much remains unknown about who built it, who lived there, and what daily life within its walls might have been like. Its demolition in the mid-18th century reflects a broader pattern across Ireland, where countless medieval structures were sacrificed to the Georgian era's appetite for agricultural improvement and orderly estates.