A residential unit is considered uninhabitable if:

A residential unit is considered uninhabitable when it violates provisions of housing and health codes. These codes are established to ensure that basic living conditions are met, such as adequate plumbing, heating, electrical systems, structural integrity, and sanitation. If a property does not meet these fundamental standards, it poses health or safety risks to residents, thus rendering it uninhabitable. This designation protects tenants from living in conditions that could threaten their well-being.

The other options, while they may affect the quality of life or desirability of a rental property, do not automatically render a unit uninhabitable. For example, a unit being unfurnished or lacking internet access does not impact the basic health and safety requirements stipulated by housing codes. Additionally, the location of a unit in a high-crime area may pose safety concerns, but it still does not meet the legal definition of uninhabitability based on structural and health standards.