CALVERTON, MD. — Merritt Properties has purchased a 123,144-square-foot office building in Calverton from SSK VP Calverton for $6 million. Located at 3901 Calverton Blvd., the four-story building was built in 1983. Merritt will undertake extensive renovations to the property with the goal of achieving LEED-CS Gold certification. Renovations, which include installing T5 lighting with occupant sensors and waterless urinals, should be complete by next summer.