CGT - possibly. Revenue may take the view that it is income. And tax you on any profit.
You won't be f.t.b.'s again. Thats a once off situation except in exceptional circumstances.
Who is a first time buyer?
A first time buyer is a person, (or, where there is more than one buyer, each of such persons):
• who has not on any previous occasion, either individually or jointly, purchased or built on his/her own behalf a house (in Ireland or abroad) and
• where the property purchased is occupied by the purchaser, or a person on his behalf, as his/her only or principal place of residence and
• where no rent, other than rent under the rent-a-room-scheme, is derived from the property for five years after the date of the current purchase.
mf