Ms Trad and her husband signed the contract in late March,however,the property was not declared on the Queensland Parliament's register of members'interests within a month,as required.
In a statement released on Monday,Ms Trad said the matter needed to be"clearly resolved once and for all".
"I want this resolved as quickly as possible and so I have decided to refer this to the CCC[Crime and Corruption Commission] to consider whether it's a matter that requires investigation,"she said.
"While the matter is being considered by the CCC,I have undertaken to remove myself from any decision-making involving Cross River Rail."
Ms Trad pledged to sell the Woolloongabba property for the same price at which it was purchased.
She said she refuted allegations made by the opposition and said Integrity Commissioner Nikola Stepanov had advised against releasing her advice publicly while the matter was being considered.