What is the minimum ceiling height for a basement that does not contain habitable spaces?

The minimum ceiling height for a basement that does not contain habitable spaces is 6'-8". This height requirement is derived from building codes that establish guidelines for spaces that are not intended for living but still must be functional and safe.

In basements that are classified as uninhabitable or utility spaces, such as storage or mechanical areas, a height of 6'-8" allows for sufficient clearance for users moving around and for the installation of necessary equipment. This height also ensures that the space can adequately accommodate any necessary sewer and plumbing lines, ductwork, or electrical wiring without resulting in impractical low points that could hinder access or usability.

The other specified heights either fall below the requirement or exceed what is necessary for non-habitable spaces. Maintaining a minimum ceiling height of 6'-8" balances safety, usability, and compliance with regulations set forth by building codes.