Inna Khodorkovskaya, Khodorkovsky's wife, told RFE/RL's Russian Service in a July 25 interview that authorities in May froze a housing complex in the Moscow suburb of Zhukovka where Khodorkovsky and other former executives of the Yukos oil company he founded have homes.
Khodorkovskaya said the authorities did not explain the action.
"So now I am thinking that I need to find a place to rent," Khodorkovskaya said. "How soon that might happen -- I don't know their plans."
She added that neither she nor her three children plan to leave Russia, even if their home is seized.
Khodorkovsky is serving an eight-year prison sentence for tax evasion and fraud, in a case viewed by many supporters and observers as political.
Khodorkovskaya explained that in order to visit her husband at the Far Eastern prison where he is being held, she must fly for nine hours, followed by a 15-hour train ride and 40 minutes in a car.