Stepping aside from legality, and speaking purely from ethics, there&#x27;s a big difference between &quot;hiring someone to provide a service for your own private home&quot; and &quot;renting out a temporary place of residence for someone&quot;.<p>Ethically speaking I&#x27;d say it&#x27;s completely okay to monitor the former, whether that service is a plumber or a babysitter, and whether the monitoring is done with a camera or your own human eyes. Those service personnel shouldn&#x27;t be expecting privacy while they provide services, anyway.<p>Ethically speaking I&#x27;d say it&#x27;s wrong and a violation of privacy to monitor the latter, regardless of whether it is done with camera or eyes, without prior warning. This is because providing a place of residence implies providing some level of privacy. Forget cameras, you shouldn&#x27;t generally enter a tenant&#x27;s place of residence even with your human eyes, without letting them know in advance (e.g. at the very least by knocking).