Abstract: A lock assembly for a meter housing asembly having a first housing panel fixedly mounted on a support member and a second housing panel mountable on the first housing panel and removable relative thereto along at least one predetermined line of travel, generally consisting of a retainer bracket having a first section detachably mounted on one of the housing panels and a second section engageable with the other of the housing panels when the first retainer bracket section is mounted on the one housing panel for restricting displacement of the second housing panel relative to the first housing panel along the predetermined line of travel in a direction tending to remove the second housing panel from the first housing panel, and means for locking the first retainer bracket section to the one housing panel when the first retainer bracket section is mounted on the one housing panel.