No, your landlord cannot engage in this type of secret surveillance conduct. It is a breach of the warranty of Peaceful possession, and would typically justify termination of lease agreement. To be on the safe side, you should contact law-enforcement and have them determine whether there is in fact evidence of illegal surveillance equipment that is functioning. A conviction Might greatly increase the ease of prosecuting a civil action for violation of your right to privacy, and in any event would better document the conduct justifying the immediate termination of lease.
Answered on Oct 10th, 2013 at 12:37 PM