Yes, it is legal to install surveillance cameras at home in most countries. However, there may be restrictions on where and how the surveillance cameras can be used. For example, in the United States, it is generally illegal to use surveillance cameras to record audio without the consent of all parties involved.

There is no universal answer to this question as it may vary from country to country. It is advisable to speak with an attorney in your area to get a definitive answer. Generally speaking, as long as you are not filming or recording people without their consent, and as long as the camera is pointed at your property and not someone else's, then it is generally legal to install a surveillance camera at home.