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 I structures are those considered to be "buildings of exceptional 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|
|Pontypridd Bridge||Pontypridd||25 May 1962||Bridge||Spanning the River Taff on the N side of the town centre.||13497|
|Hetty Engine House||Pontypridd||8 March 1984||Engine House||On the W side of Hopkinstown and in a prominent position set high above the main Pontypridd to Rhondda road behind a rubble-stone wall.||13515|
|Headframe at Hetty Shaft||Pontypridd||8 March 1984||Colliery Headframe||Attached to the N side of the engine house.||24872|
Media related to Grade I listed buildings in Rhondda Cynon Taf at Wikimedia Commons