Abstract: A vertically adjustable rod support assembly for selectively supporting an existing curtain rod and curtain at an elevated height within an existing window frame, and for enabling a user to lower the vertical height of the curtain rod in order to attach or detach the curtain from the rod, without the need for standing upon a ladder or another object. The vertically adjustable rod support assembly comprises two guide tracks, two pulley assemblies, and two selectively movable rod supports, each attached to a different pulley assembly. The rod supports are used for supporting the curtain rod. The pulley assemblies are used to selectively lower the rod supports, and thereby enables the user to lower the vertical height of the curtain rod supported thereupon, without the need for standing upon a ladder or another object.