District of Columbia Code Division VIII. General Laws. § 47-4474. Redemption of property.

(b)(1) The owners of real property sold as provided in this chapter; their heirs, executors, or administrators; any person having an interest in or a lien on the property; or any person on their behalf, shall be permitted to redeem the property sold at any time within 180 days after the sale.

(2) The property may be redeemed upon payment to the purchaser (or if the purchaser cannot be found, to the Mayor), for the use of the purchaser, his heirs, or assigns, the amount paid by the purchaser and interest thereon at the rate of 18% per year.