Today, visitors to this spot in North Tipperary will find a modern house occupying the site, with no visible traces of the medieval stronghold that once commanded this strategic position overlooking the water.

Historical records paint a picture of a castle already in ruins by the mid-17th century. The Civil Survey, conducted between 1654 and 1656, describes it simply as "an old ruined castle the walls onely standing", suggesting the structure had been abandoned for some time before Cromwell's surveyors arrived. The Down Survey maps from the same period also mark the castle's location, providing cartographic evidence of its existence even in its deteriorated state.

The complete disappearance of Tomona Castle's physical remains represents a common fate for many of Ireland's lesser-known medieval fortifications. Unlike the grand castles that drew restoration efforts or tourist interest, smaller defensive structures like Tomona often became quarries for local building projects, their stones repurposed over centuries until nothing remained above ground. The modern house that now occupies the site serves as the only marker of where this piece of Tipperary's medieval landscape once stood, its foundations possibly incorporating the last physical remnants of the old castle.