Abstract: An adjustable bracket assembly for securing an edge of a panel relative to a surface. The adjustable bracket assembly includes a mounting member and a bracket member. The mounting member has a body configured for mounting on the surface and defining at least two fastening screw receiving holes. The bracket member includes an extension arm extending perpendicularly to a mounting arm. The extension arm includes a panel clamp and the mounting arm includes a mounting plate extending therefrom. The mounting plate defines at least two fastening screw holes and at least two adjustment screw holes therethrough. A fastening screw extends through each fastening screw hole and is received in a respective fastening screw receiving hole. An adjustment screw is positioned in each adjustment screw hole and is threadably adjustable to contact the mounting member body and adjust the angular relationship between the bracket member and the mounting member.