The Home + Control App allows you to control as many homes as you wish from one single account. To control an existing connected installation, you just need to ask an existing user to invite you. Once you are invited in a home, you get the same access rights than the person who invited you. We suggest you to have max 10 homes for each H+C account.
To set up a new installation, just go in your Home + Control App settings and select ;Install a new home ;.