In the United Kingdom, the term listed building refers to a building or other structure officially designated as being of special architectural, historical, or cultural significance; Grade II* structures are those considered to be "particularly important buildings of more than special interest". Listing was begun by a provision in the Town and Country Planning Act 1947. Once listed, strict limitations are imposed on the modifications allowed to a building's structure or fittings. In Wales, the authority for listing under the Planning (Listed Buildings and Conservation Areas) Act 1990 rests with Cadw.
|Name||Location||Date Listed||Grid Ref.[note 1]
|Function||Notes||HB No[note 2]||Image|
|The Town Clock||Tredegar||25 May 1962||Very prominently located in the centre of The Circle.
Media related to Tredegar Town Clock at Wikimedia Commons
|[Clock tower 1861]|
|SW Roundhouse at Roundhouse Farm||Nantyglo and Blaina||29 June 1950||Farm building||Roundhouse Farm is situated on the valley bottom, W of Nantyglo. Farm reached off the end of Waun Ebbw Road. SW tower located some 40 metres away from farmyard.||1863|
|St Illtyd's Church||Llanhilleth||6 June 1962||Church||Set in centre of small settlement of St Illtyd, on N side of by-road. Large circular churchyard with remains of medieval churchyard cross some 10 metres N of church.||1866|
|Former boiler house at Dunlop Semtex rubber factory||Brynmawr||5 August 1986||Boiler House||Prominently sited on the E side of the A467 on the S edge of Brynmawr, opposite main Dunlop Semtex factory complex (separately listed within Nantyglo and Blaina Community).
Media related to Dunlop Semtex rubber factory, Brynmawr at Wikimedia Commons
|NE Roundhouse at Roundhouse Farm||Nantyglo and Blaina||29 June 1950||Farm building||Roundhouse Farm is situated on the valley bottom, W of Nantyglo. Farm reached off the end of Waun Ebbw Road. NE tower located alongside main entrance to farmyard.||17086|
|Agricultural Range at Roundhouse Farm||Nantyglo and Blaina||30 July 1996||Farm building||Roundhouse Farm is situated on the valley bottom, W of Nantyglo. Farm reached off the end of Waun Ebbw Road, with the agricultural range situated S of the early C20 farmhouse.||17087|
|Milgatw||Tredegar||14 October 1999||House||Blaen-y-cwm is reached off the Tredegar-Trefil Road, from Nant-y-bwch. Located some 1 km N of Tredegar. Milgatw is located at the end of the no-through road.||22494|
|Sirhowy Ironworks||Tredegar||14 October 1999||Ironworks||Graham’s Yard is located off Dukestown Road. Ironworks is set into hillside to E.||22496|
|British Steel Tinplate Works General Office||Ebbw Vale||29 October 1999||Works office||Prominently located along Steelworks Road, on E fringe of massive steelworks complex.||22530|
|Furnace Bank||Ebbw Vale||29 October 1999||Furnaces||Set back from the E side of Steelworks Road, to rear of factory buildings, and opposite the main entrance to Ebbw Vale Steelworks.||22531|
|Wikimedia Commons has media related to Grade II* listed buildings in Blaenau Gwent.|