Under Common Travel Area arrangements any British citizen has the right to live and work in (the Republic of) Ireland and likewise any Irish citizen has the right to live and work in the UK. I lived there myself for a couple of years and still own half of a property in County Clare.What requirements do you need to live or buy property in the South?
Information for UK and Irish citizens on their rights under the Common Travel Area arrangements (CTA).
"The Common Travel Area (CTA) is a long-standing arrangement between the UK, the Crown Dependencies (Bailiwick of Jersey, Bailiwick of Guernsey and the Isle of Man) and Ireland.
Under the CTA, British and Irish citizens can move freely and reside in either jurisdiction. British and Irish citizens enjoy associated reciprocal rights and privileges, including the right to work, study and vote in certain elections, as well as to access social welfare benefits and health services."