A Vault-Tec Rep on the front walk of the Sole Survivor's House in Fallout 4. A Vault-Tec Van can be seen parked behind him.

The front walk of the Protagonist's House in Fallout 4.

Located in the Front Yard of the house.

This walkway leads from the sidewalk to the Front Door.

The Vault-Tec Rep walks from his Van to the house on this walkway. He rings the bell and when you open the Door he informs you that you have been accepted to the vault program.