| EntityId | FB1EntityId | The entity ID of the site being initialized. | |
| OwnerHouseholdEntityId | FB1EntityId | The entity ID of the household that owns this site. | |
| BuiltData | FB1SiteAreaBuiltSaveData | The built area structure data for this site. | |
| SaveVersion | EB1SaveVersion | The save version associated with this site initialization. | |
| CompatibilitySaveVersion | EB1SaveVersion | The compatibility save version, updated only when site size changes. | |
| UserEditedTime | FDateTime | The last time a user edited this site. | |
| WorldLocation | FVector | The world location where this site is placed. | |
| WorldRotation | FRotator | The world rotation of this site. | |
| Scale | FVector | The world scale of this site. | |
| RefreshSite | bool | Whether this site should be fully refreshed upon initialization. | |