 Despite lying mostly within the boundaries of Porirua City, Transmission Gully is sparsely populated, and most of the land is farmland, forest, or scrub.There are some areas with lifestyle blocks, particularly near Pauatahanui, and Transmission Gully is also home to Battle Hill Farm Forest Park.In 1879 a proposed Haywards–Plimmerton Line railway route north from Wellington was to use these valleys but was never built.