Home Expansion is a side quest in the Fallout 76 update Steel Dawn. The quest will automatically start after viewing a Shelters Claim Center poster or upon entering the Shelters Claim Center, located just west of Vault 51's entrance. This quest introduces the Shelters feature and offers the reward of basic Shelter building items.
Enter the Shelters Claim Center and interact with Mr. Clark. The robot will introduce the player character to Shelters, an instanced building feature introduced with Steel Dawn. Listen to Mr. Clark and then select the "Yes! I am here for a Shelter!" dialogue option to proceed with the quest.
Before Mr. Clark can unlock the Shelters, there is one small step to complete. One must access the nearby terminal and register as a Shelter owner. To do this, just click the "Shelter Owner Registration System" and then "Register New Owner" to proceed.
Return to Mr. Clark to complete the quest by selecting the "There's nothing else I need to know" dialogue option. One can also ask basic questions to learn more about the Shelters system before completing the quest.
Discussing the Shelters Claim Center's previous occupant, Reuben Gill, with Mr. Clark will start a miscellaneous quest to find the key to Gill's safe in the shelter. The area surrounding the isolated cabin will be highlighted on the map, and another miscellaneous quest to search the cabin occupant's remains will be started upon entering the cabin area. After acquiring Reuben's safe key from Reuben's corpse, the safe can be unlocked and the Passwords note can be looted, allowing access to Reuben's personal logs on the Shelters Claim Center terminal.