This is a lovely hotel near my parents house in Sandycove, so if you plan to stay before or after the wedding it may be a great option for you!
Its near the Dún Laoghaire DART station and many shops. As the name suggests it is near the Ocean similar to Haddington House.
This is a fancy hotel right by Dún Laoghaire pier! Close to my parent's house also, walking distance to the DART that can take you right into Dublin City Center. Dún Laoghaire town is walkable from here and there is a great view of Dublin Bay!