A landlord can enforce the terms contained within the signed lease.
If a condition of the lease has been violated by the tenant’s actions, then a landlord can proceed against the tenant under the terms stated explicitly within the lease.
Read the content of your lease carefully and see if the change of a lock (or if preventing access to the landlord at all times) is in violation of any of the covenants of the agreement.
Past that, Standard Legal cannot make assumptions about what is written in your lease, nor can we give you legal advice as we have no attorney-client relationship. If you feel you need advice from an attorney, you can find one for FREE at our Attorney Finder page.
If you wish to have a well-written lease document to use for future tenants of your properties, review Standard Legal’s Lease Agreements legal forms software options.