Introduction SharePoint site designs are powerful tools for automating site configuration, but they’re typically applied during site creation. What if you need to apply Microsoft’s out-of-the-box site designs to existing sites using automation? The PnP PowerShell, CLI for M365 and other PowerShell module cover applying custom site designs only. We can leverage a PowerShell hack using REST API calls to achieve this functionality. Thanks to Arash Aghajani who pinpointed on feasibility and requested for it to be natively available within PnP PowerShell.