You’re moving into a house with home security components
A new home may come with an installed security system. All the alarms and cameras work, are placed in the best spaces, and are ready to go. In this instance, just turn on the phone to call and set up a new contract. A Vivint installer will still show up to ensure there are no usability problems, and they might offer options on upgrades. It's a preliminary appointment, and you can get your 24/7 monitoring set up without paying for any new devices -- unless you get some new devices.
The previous owners can give an existing Vivint contract to you for a one-time set-up fee to make the process simpler. If the previous owners are moving to an apartment or retirement community, transferring the Vivint contract may be a condition of the sale.
You need to move and bring your home security components with you
You might need to bring your existing Vivint system with you to a new house when you move. That’s fairly easy to do, as many alarms and smart devices are plug and play. You can remove each alarm or camera by yourself or use a Vivint installer to dismantle everything. Then an expert will hang the same features -- and any smart devices you need to add -- in your new house. The home security contract will stay the same.