 He commissioned architect Francis Johnston to rebuild Townley Hall, the family seat between Drogheda and Slane.He was a magistrate for counties Louth and Meath, High Sheriff of Louth in 1792, and deputy Lord Lieutenant of Louth in 1852.Blayney Townley-Balfour married Lady Florence Cole, daughter of William Cole, 1st Earl of Enniskillen; they had ten children.