I have created a sub site and I define a custom master page for it. Then I save it as a template. After that I started creating sub sites based on the template, where all the subsites get the custom master page as defined in the template.

Now let say I have 20 sub sites , and I want to do a change to all the sub sites master pages such as changing the footer or the search box location. Currently each of the 20 sub site have a separate master page and to apply such a change I will need to modify the related 20 master pages separately. Now since I will always need the same master page to be used inside all the subsites including any future changes , so is there a way in SP to force the sub sites to be using the same master page (shared master page) , so if I modify the shared master page it will affect all the sub sites at once ? Thanks

2 Answers 2


You can open top level site then

Site Settings -> Master Page -> Check Reset all subsites to inherit this site master page setting and click Ok

This will set top level master page to all Sub Sites.

  • can you advice from where i can get this feature. now i went to our site collection >> site settings >> Web Designer Galleries >>Master pages. then i select the seatle.master but i can not find the option to "reset all subsites to inherit this site master page setting" ??
    – John John
    May 29, 2015 at 1:22
  • You should enable publishing feature May 29, 2015 at 1:27
  • 1
    And you should not go to web designer galleries, what Amal mentioned is inside site collection administration, then "Look and Feel" -> Master Page
    – Gwny
    May 29, 2015 at 6:34
  • @Gwny there is no option named "Master Page " under the "Look and Feel",, should i enable publishing feature inside my site collection , to have this option ?
    – John John
    May 29, 2015 at 9:33
  • Why not try it out? You can deactivate it.
    – Dinerdo
    May 29, 2015 at 14:35

You can try the below script to change the masterpage for all subsites.

$site = Get-SPSite http://portal/sites/collaboration
$site | Get-SPWeb -limit all | ForEach-Object { $_.MasterUrl = "/sites/collaboration/_catalogs/masterpage/custom.master";$_.Update() }

Changing the master page on SharePoint sites with PowerShell

Also check this one: Powershell so all of subsites/sub-sub sites inherit from Parent site's master page


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