I have a powershell script I developed in order to create document libraries across multiple sites under a single site collection. I wish to now add the appropriate Site Administrators with appropriate permissions to the document library, and am having a little difficulty in finding the appropriate group name in order to add it. This is what I have thus far. It will create the document library and I managed to display any Sharepoint group that has a string match to what I am looking for, but this seems too prone to error. I also do not know how to actually add the group once I have properly grabbed it.

$listTemplate = [Microsoft.SharePoint.SPListTemplateType]::DocumentLibrary
$listURL = "mydoclib"
$listTitle = "Document Library"
$listDescription = "Document Library"

$spWeb = Get-SPWeb "http://site.com/aboutme"
  foreach($subWeb in $spWeb)
  if($subWeb -ne $null)
    Write-Host $("Site: "+$subWeb.URL)

    $SiteRoles = $subWeb.RoleAssignments
    foreach($role in $SiteRoles)
      write-Host $role.Member.Name -foregroundcolor "yellow"
      if ($role.Member.Name -like "*Admin*")
        write-host $role.Member.Name -foregroundcolor "cyan"
    $list = $subWeb.Lists[$listURL]
    $list.Title = $ListTitle
    $list.OnQuickLaunch = $True
    Write-Output $($subWeb + "does not exist")

How would I go about properly grabbing any SharePoint group with the "TeamSite Administrator" permission level (a custom permission level) and apply it to the newly created Document Library?

2 Answers 2


You have to break the permission of the list, create a new role and assing it the to group.
Then assign the role to the list.

$group = $web.SiteGroups[$GroupName]
$roleAssignment = new-object Microsoft.SharePoint.SPRoleAssignment($group)
$roleDefinition = $web.RoleDefinitions[$PermissionLevel];

Have a look here Add group to Library permissions using powershell

  • Thank you for your reply - this works wonderfully. The solution provided assumes I have a group name already to work with. Would you happen to know how I can grab a group with specific permission levels on the specific site I am working with? Since I am iterating through sites, I do not have a method to grab specific group names prior to applying them. For example, I would like to grab the "About Me Administrators" group (if I am currently iterating that site) which has the "TeamSite Administrators" permission level and only apply that group to the newly created document library
    – Kolten
    Sep 11, 2014 at 17:55
  • nevermind i found a way :) I mistakenly assumed I needed to ADD the group, but it gets created with inherited permissions anyways, so I actually needed to REMOVE the groups I'm NOT interested in. Using code found here I finalized my solution. Thanks! sharepointthinking.wordpress.com/2012/10/01/…
    – Kolten
    Sep 11, 2014 at 21:37

You can get site collection admins from powershell as:

foreach($siteAdmin in $site.RootWeb.SiteAdministrators)



  • I am actually looking to grab site administrators for a specific site with a specific permission level - not the site collection admins.
    – Kolten
    Sep 11, 2014 at 18:01

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