The Brunswick Commercial Historic District was listed in the National Register on January 12, 2016 for its historic commercial and architectural importance. The section of Maine Street that lies between the Cabot Mill on the banks of the Androscoggin River, and the First Parish Church in downtown Brunswick served as the primary commercial business district for the region from the early-nineteenth century through the mid-twentieth century. The Brunswick Commercial Historic District consists of most of the northern half of that historic area, between Mason and School Streets. These buildings retain much of their original design features, and comprise a visually cohesive grouping of commercial buildings constructed between 1820 and 1961. The history of the district reflects both national and local commercial development trends. During the nineteenth century Brunswick followed a common development pattern, in which a very mixed Maine Street, containing homes, businesses, and churches, gave way to a downtown that was almost entirely commercial at the street level, although with living areas on upper floors. Twentieth century changes to the commercial aspect of the district included the introduction of neon-signs, gas stations and a modern grocery store set back from the road. Architecturally, the buildings reflect the predominate styles of the mid-nineteenth through early twentieth century, most notably the Greek Revival and Colonial Revival periods. Many of the buildings are a mix of wood and brick, and of gable-front and flat roofs, but it is the two-story long blocks that give the district its defining look and help pull together the varied styles. There are thirty-seven buildings, structures or objects within the district boundaries, all but three of which contribute to the historic significance of the district.