Abstract: A foundation anchor system for a building structure is disclosed herein. The foundation anchor system includes a positioning member for setting and aligning a sill plate anchor component in a foundation wall of a building structure, an anchor member configured to be disposed in the foundation wall, and an anchor bolt configured to secure a sill plate member to the foundation wall. The positioning member includes a body portion, first and second downwardly extending tab portions for overlapping opposite sides of the foundation wall, and an anchor component engagement portion configured to removably engage an end of a sill plate anchor or an end of a sill plate anchor bolt. The anchor member includes a tubular body portion with a threaded interior bore, and a frustoconical skirt portion for retaining the anchor member in the foundation wall. An installation method utilizing the foundation anchor system is also disclosed herein.