A folding trowel assembly has multiple trowel blades of assorted types and sizes housed in a casing. The folding trowel assembly allows for different trowel blades to be unfolded and used as needed. A pivot mechanism includes a pivot pin for positioning each of the trowel blades into a working position at an adjustable angle relative to the casing. A release mechanism applies compression to the stacked trowel blades to inhibit rotation of the trowel blades about the pivot pin and relieves compression from the stacked trowel blades to permit rotation of the trowel blades about the pivot pin. An angle between the casing body and the casing neck tab allows trowel blades to be pivoted such that sufficient clearance is provided between the casing body and a work surface to permit the casing body to be used as a handle for each of the trowel blades.