 In 1875 Cogan was reallocated to the new Penarth Local Board in a major administrative reorganisation.The building of Penarth Docks in 1865 and the town's rapid growth prompted an explosion of house building in Cogan providing mostly terraced housing, local shops and public houses for dock workers.Most of the building in the village took place over the ten years between 1859 and 1869 and Cogan contained two busy brickworks, making the local marl bricks still seen today all over Cogan and Penarth.