D.C. Code § 47-1070
Certain real property, described as parcels 319/2, 319/3, and 319/4, at the Walter Reed U.S. Army Medical Center, together with the improvements thereon and any future improvements constructed thereon, shall be exempt from all taxation, including ordinary and special taxes and use or possessory interest taxes, on real property or the use thereof, so long as the property is used for the purposes of housing military personnel or their families, as contemplated by 10 U.S.C. §§ 2871 through 2885 , subject to the provisions of §§ 47-1005, 47-1007, and 47-1009. The transfer of a leasehold or fee interest in the property, or the improvements thereon, from the United States of America, or any branch of the U.S. military; the recordation of any lease, deed, deed of trust, other security instrument, or financing used for the improvement or construction of military housing; and the transfer from any entity to the United States government, or any branch of the U.S. military, shall be exempt from all transfer and recordation taxes of or imposed by the District of Columbia.
D.C. Code § 47-1070