At 30-Mile Point Lighthouse, the first associated buildings were a carriage barn and an outhouse, and additional structures were added over the years as the lighthouse's operation changed. The original carriage barn stood directly east of the lighthouse, and the present barn was built in 1904; these barns contained stalls for the light keepers' horses and housed sleighs and carriages that linked the station to Somerset and the outside world. A wooden fence was installed in 1893. Because of the site's relative isolation, the light keepers' families grew much of their own food in a large garden. The outhouse, once located dangerously close to the embankment, was moved in the early 1950s to save it from the eroding shoreline. In 1881, the Lighthouse Service replaced the lard oil lamp with one burning mineral oil, or kerosene, and ten years later installed the first of two round iron oil houses so the more flammable fuel could be stored away from the lighthouse; a second oil house arrived sometime after 1900, and the earlier one was later moved east of the lighthouse for use as a well house. In 1879, the Lighthouse Service built a woodshed east of the lighthouse, replaced it with the existing woodshed in 1905, and later adapted it to store coal for a furnace installed in 1924; each family living at the lighthouse was allotted 8 tons of coal per year, and the shed also sometimes served as a workshop.