Here's the law:
Chap. 58, Art. 8, §58-814.
Storage facility not to be used for residential purposes.
(a) An operator may not knowingly permit a leased space at a self-service storage facility to be used for residential purposes.
(b) An occupant may not use a leased space for residential purposes.
(c) An operator may enter leased space at times reasonably necessary.
State Self Storage Lien Laws