There's been a call on all the major political parties to do an internal audit.
It comes after the resignation of Junior Minister of State Robert Troy following controversy over his failure to fully declare his property interests.
Aontú's Peader Toibín wants a close eye to be kept on TDs who are also landlords.
"We're calling for Fianna Fáil, Fine Gael and Sinn Fein to carry out an audit of their TD landlords to ensure that none of them are law-breakers in terms of this", he told Newstalk.
"Political parties continuously speak for the need for political reform at Oireachtas level - but political reform should start at home."
"The parties themselves have responsibility here."
"Zero tolerance policy"
Toibín says there should be a "zero tolerance policy" when it comes to evading laws that regulate properties.
Housing Minister Darragh O'Brien has said he welcomes changes to legislation on ethics in public office, but that landlord TDs should still get a vote on housing issues.
He would not give his opinion on the resignation, but he described Troy as "a really effective minister" who O'Brien supported as a TD.
"He made some mistakes. But it has gone on for, you know, eight, ten days, and I think it was obviously having a toll on Robert and his family as well", Minister O'Brien said.
"There's no question that in my mind that Robert Troy will be back at some stage into the future. He was a very effective TD."
Main image shows Peadar Toibin.