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Notice of entry laws are absent from North Carolina law, and as a result, the landlord is not required to provide notice of entry and therefore may enter the premises for the following reasons: Non-emergency maintenance and repairs.
In this way, can landlord let themselves in?
It is in fact illegal for a landlord or agent to enter the property without permission from the tenant. Ultimately, a landlord has no right of entry unless the tenant grants them access or the landlord is given permission by the courts.”
https://findanyanswer.com/can-a-landlord-enter-without-permission-ireland