D.C. Mun. Regs. tit. 14, r. 14-2515
Where construction work is conducted in an occupied rental unit within an apartment building, the owner shall comply with the District of Columbia Noise Control Act of 1977.
Except as provided in subsection 2515.3, in any case where noise from construction, repair, or maintenance work will continue over a period of more than forty-eight (48) hours from the time the work is first initiated until the conclusion of the job (including periods of time when no work is being done) and the noise from the work will exceed sixty (60) decibels, the landlord shall provide the tenant with not less than five (5) days written notice of the construction, repair, or maintenance work, including the dates and times that the work will occur and a description of the work to be done.
Subsection 2515.2 shall not apply to emergency work which is necessary to restore property to a safe condition following a public calamity or act of God, or work required to protect the health and safety of persons; provided, that the work shall be undertaken promptly and it is not feasible to provide advance notice.
D.C. Mun. Regs. tit. 14, r. 14-2515