Flat Holm Lighthouse

Tapering circular tower, of white painted lined-out render (over rubble), 30m in height, on an octagonal base largely enclosed by service accommodation. Tower has plain moulded band just below its top, and a strongly projecting moulded cornice to the railed platform surrounding the lantern. This has ribbed cast-iron base (housing the service room) and lattice glazing, drum-cowl surmounted by arrow weather vane. Narrow stair windows aligned over the entrances to the tower, and a single rectangular splayed window in its upper stage. Single storeyed building which encloses the tower has original doorway now blocked on the sea-ward side: Chamfered 4-centred archway flanked by narrow side-lights, with Trinity House arms in chamfered pedimented centre-piece of parapet.

Symmetrically arranged flanking ranges with renewed fenestration. Projecting porch in N-facing elevation, possibly a later addition or modification. It seems likely that these buildings were originally built in c1820, but they have been added to and altered in more recent times. The lighthouse is enclosed by low rendered rubble walls.

Tower is open through to its upper stage, and has cantilevered spiral stone stair with cast-iron rail. Ornate cast-iron brackets to lantern-walkway and short spiral access stair. Helical 'beehive' lens with red sector lights.