Abstract: A modular building construction and components thereof. A foundation for a building includes anchor bolts extending around its periphery. A metal lower track is installed over the anchor bolts and secured thereto with nuts and rod couplers. Elongated connector rods are threaded onto the upper ends of the couplers. Pre-manufactured modular wall panels, integrally molded with a metal stud along a first lateral edge and a complementary recess along a second lateral edge, are successively installed in the track. A first panel is installed with an open side of the stud surrounding the connector rod. The second, adjacent panel is installed with its second lateral edge facing the stud. The two panels are slid together to surround and enclose the connector rod. The process continues until the entire peripheral wall is formed. A metal upper track is laid over the upper ends of the wall panels with the connector rods extending therethrough.