The awning topper assembly is designed to be mounted on the interior side of a window. The assembly includes two curtain support rods of conventional design, each having a front and spaced, parallel sides. A valance is provided having upper and lower channels, each adapted to receive one of the support rods. Plastic extenders are provided for each side of the rod in the lower channel. Each extender engages a different side of the lower support rod, so as to retain the front of lower portion of the valance a greater distance from the plane of the window than the front of upper portion of the valance and thus provide an awning like appearance.