The job duties of a live-in house sitter focus on caring for a house or another piece of property while the owner is away. Your responsibilities vary depending on the needs of each client, but as a live-in house sitter, you always stay at the residence for the length of the contract. Some clients expect you to ensure that the home remains secure, while others seek sitters who can take care of pets and perform lawn and garden tasks. Other clients prefer to hire professional house sitters who can perform maintenance tasks on the home during their stay.