Though the main castle was demolished in the 1930s, substantial remains of its outbuildings still stand, along with sections of a 19th-century Gothic Revival style bawn; a fortified wall that once protected this important stronghold. These surviving structures offer tantalising glimpses into what was once the chief seat of the Molloy family, as noted by historian Cooke in 1875.

Before its destruction, Broughal Castle cut an imposing figure in the Irish landscape. Historical depictions in the Kings County Chronicles show it as a tall rectangular tower, complete with a crenellated wall walk where defenders once stood guard, topped by a distinctive gabled roof. This architectural style was typical of Irish tower houses, blending defensive practicality with the residential needs of the landed gentry who called it home.

The castle's demolition in the 1930s marked the end of centuries of history, but archaeological surveys continue to reveal details about the site. Research by Loeber in 1988 has helped piece together the castle's appearance and significance, whilst the Archaeological Inventory of County Offaly, published in 1997, provides the foundation for our current understanding of the site. Though the main tower is gone, the remaining Gothic Revival additions and outbuildings serve as physical reminders of how Irish castles evolved over time, adapting to changing architectural fashions whilst maintaining their role as symbols of power and prestige in the countryside.