View fullsize Living room wall prior to built-in. There's a cold air return behind the Tansu (cabinet). View fullsize New built-in bookcase with all shelves adjustable. The light switch was relocated into the finished end of the bookcase. View fullsize The bookcase was designed to join seamlessly with the existing base. The stain was custom matched to the millwork in the home. View fullsize Close up showing the period style wood grille inset into the base. The ductwork was extended from the wall to the back side of the new grille.