I believe you are referring to a 1031 Reverse Exchange. The same 45 day Identification Period and 180 day Exchange Period deadlines of IRC §1031 apply to a safe harbor reverse exchange. The identified Relinquished Property must be sold, and the parked Replacement Property transferred to the Exchanger to complete the exchange within 180 days of parking the Replacement Property.Hmmm, look into this. You could sell and keep the money in an account that you don't touch until you buy you're next like property. The closing attorney can set this up. I think you'd have 3 years after the sale to reinvest the money. But like I say, you need to research this