substandard housing conditions

the conditions obtaining in connection with the existence of any dwelling, or dwellings, or housing accommodations for human beings, which because of lack of sanitary facilities, ventilation, or light, or because of dilapidation, overcrowding, faulty interior arrangement, or any combination of these factors, is in the opinion of the Commissioners detrimental to the safety, health, morals, or welfare of the inhabitants of the District of Columbia.

Defined by the Supreme Court in Berman v. Parker a E, 348 U.S. 26 (1954).