D.C. Mun. Regs. tit. 9, r. 9-309
The estimated assessment roll, all maps, field books, assessment sales-ratio studies, copies of any documents received from the Office of the Surveyor, and plats shall be available for public inspection during normal business hours.
Records of individual real properties, including any notes, memoranda, and statement(s) indicating the basis upon which the real estate has been assessed, shall be open for inspection by the owner or the owner's duly authorized representative during normal business hours; Provided, that an owner may be required to give the Deputy Chief Financial Officer notice of his or her intention to inspect records at least twenty-four (24) hours before the inspection.
Copies of all material shall be furnished to any person after the submission of a Freedom of Information Act request pursuant subchapter II of the District of Columbia Administrative Procedure Act (D.C. Official Code § 2-531, et seq.). The Deputy Chief Financial Officer shall collect a fee as permitted by law for the costs of such copies, unless the fee shall be waived under authority of law. Material shall be deemed available and delivered when published and accessible on the Internet.
Copies of documents recorded and indexed at the Recorder of Deeds shall not be subject to a Freedom of Information Act request, as such documents are already available to the public generally.
Copies of real property tax bills or assessment notices shall be furnished to the owner or the owner's duly authorized representative without charge. A duly authorized representative is one who has a properly completed Letter of Agent Authorization on file and in force for the tax year or tax years requested. The duly authorized representative shall submit a copy of the Letter of Agent Authorization at the time the request for copies of real property tax bills or assessment notices is made.
Any person may request a copy of a real property tax bill or assessment notice of a real property by submitting a Freedom of Information Act request pursuant to subchapter II of the District of Columbia Administrative Procedure Act (D.C. Official Code § 2-531, et seq.).
Freedom of Information Act requests should be made in writing and delivered to: Freedom of Information Officer, Office of Tax and Revenue, 941 N. Capitol Street, NE, Suite 810, Washington, DC 20002. Such requests may also be faxed to the attention of the Freedom of Information Officer at (202) 442-6479.
D.C. Mun. Regs. tit. 9, r. 9-309