permanent tsb, 56/59 St. Stephen's Green, Dublin 2. permanent tsb p.l.c. is regulated by the Central Bank of Ireland. permanent tsb p.l.c. is a tied assurance agent for Irish Life Assurance p.l.c. permanent tsb p.l.c. is a limited liability company registered in Dublin under No. 222332. The company's registered office is: permanent tsb, 56/59 St. Stephen's Green, Dublin 2.