Replace a Window in a Damaged Frame: What You'll Accomplish in a Weekend

https://high-wiki.win/index.php/Real_Cost_of_New-Construction_Windows:_7_Hidden_Price_Drivers_Contractors_Miss

If your house has windows that rattle, leak, or show rot in the sash or jambs, you can often replace the operable window and keep the existing frame—if the frame is still structurally sound