Senator Ivor Callely has told the Seanad Committee on Members' Interests that the house in which he resides in West Cork is up for sale but that the property is not in his ownership.
Mr Callely was answering questions about travel and subsistence claims from his home in Cork, while he maintained a base in Dublin.
The committee has adjourned to consider its findings in private.
Senator Callely appeared for the second time before the Select Committee on Members' Interests.
It is investigating complaints that he claimed travel and subsistence expenses from a house in west Cork while retaining a home in Dublin.
Independent Senator Joe O'Toole asked why Mr Callely had not mentioned that the Kilcrohane house was currently on the market given that he had repeatedly insisted it was his principal residence.
However, Senator Callely said that was not relevant and said the Committee was diversifying away from the original complaints.
When Mr O'Toole questioned information on his website, Senator Callely responded by claiming information on the former INTO chief’s own website was itself misleading.
Later, Labour Senator Alex White repeatedly asked if it was not worthy of comment that the Senator justified claiming expenses for staying in his family home in Dublin.
Senator Callely responded by insisting he was within the regulations.
The tension rose when Senator White pressed him on personal circumstances, which he had alluded to in his opening statement.
Senator Callely said he was entitled to a separate private life.
He protested that he would not be bullied when asked repeatedly whether he still attended clinics in Dublin.
Senator Callely forfeited the Fianna Fáil whip over the controversy.