Create a subsite in SharePoint Online in 2026

Microsoft recommends a flat hiearchy in SharePoint however if you need to create a subsite this can be done from the New menu in the Site Contents.


If you find that Subsite isn't available on this menu it may be disabled at the tenant level.

You can enable this by going to 

SharePoint Admin Center > Settings > Classic settings page

https://you-admin-site/_layouts/15/online/TenantSettings.aspx








 



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