21, Sion Street, Pontypridd occupies a 193 m² plot as recorded by HM Land Registry.

Of the 62 other houses in this postcode, 59 have recorded plot sizes, and this one ranks as the 6th largest.

21, Sion Street, Pontypridd has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 19 Sep 2025.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

21, Sion Street, Pontypridd last changed hands on 20th February 2026, selling for £150,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold twice since 1995.

The market for similar properties has risen by 2.5% since February 2026.

• Sold Feb 2026£150,000
• Sold Oct 2003£112,500

Land Registry records and our Estate Agent network show 143 sales of comparable properties within 610 metres of 21, Sion Street, Pontypridd since 2019.

Most recently, 2 New Houses, Foundry Place, Pontypridd, CF37 4SA, a freehold house, sold at £125,000 on the 23rd February 2026.

Read more about house prices in CF37.

• Sold Feb 2026£125,000 | 3 Bed House2 New Houses, Foundry Place, Pontypridd, CF37 4SA2 New Houses, Foundry Place, Pontypridd, CF37 4SA
• Sold Jul 2025£148,000 | 3 Bed House60, Middle Street, Pontypridd, CF37 4PP60, Middle Street, Pontypridd, CF37 4PP
• Sold May 2025£170,000 | 3 Bed House63, Middle Street, Pontypridd, CF37 4PP63, Middle Street, Pontypridd, CF37 4PP
• Sold Jan 2025£175,000 | 4 Bed House31, Middle Street, Pontypridd, CF37 4PP31, Middle Street, Pontypridd, CF37 4PP
• Sold Aug 2024£140,000 | 4 Bed House98, Middle Street, Pontypridd, CF37 4PP98, Middle Street, Pontypridd, CF37 4PP
• Sold Jul 2024£190,000 | 4 Bed House24, East Street, Pontypridd, CF37 4PH24, East Street, Pontypridd, CF37 4PH
• Sold Jan 2024£120,000 | 3 Bed House96, Middle Street, Pontypridd, CF37 4PP96, Middle Street, Pontypridd, CF37 4PP
• Sold Jun 2023£140,000 | 3 Bed House16, East Street, Pontypridd, CF37 4PH16, East Street, Pontypridd, CF37 4PH
• Sold Mar 2023£87,500 | 3 Bed House37, West Street, Pontypridd, CF37 4PS37, West Street, Pontypridd, CF37 4PS
• Sold Oct 2022£154,950 | 3 Bed House35, Middle Street, Pontypridd, CF37 4PP35, Middle Street, Pontypridd, CF37 4PP
• Sold May 2022£160,000 | 3 Bed House39, Middle Street, Pontypridd, CF37 4PP39, Middle Street, Pontypridd, CF37 4PP
• Sold Feb 2022£116,000 | 3 Bed House11, Middle Street, Pontypridd, CF37 4PW11, Middle Street, Pontypridd, CF37 4PW
• Sold Feb 2022£135,000 | 3 Bed House42, West Street, Pontypridd, CF37 4PS42, West Street, Pontypridd, CF37 4PS
• Sold Jun 2021£153,000 | 3 Bed House11, Sion Street, Pontypridd, CF37 4SD11, Sion Street, Pontypridd, CF37 4SD
• Sold Jun 2021£170,000 | 3 Bed HouseThe Chapel, Sion Street, Pontypridd, CF37 4SDThe Chapel, Sion Street, Pontypridd, CF37 4SD
• Sold May 2021£146,000 | 3 Bed House87, Middle Street, Pontypridd, CF37 4PP87, Middle Street, Pontypridd, CF37 4PP
• Sold Jul 2020£108,000 | 3 Bed House16, West Street, Pontypridd, CF37 4PS16, West Street, Pontypridd, CF37 4PS
• Sold Jan 2020£123,500 | 3 Bed House26, West Street, Pontypridd, CF37 4PS26, West Street, Pontypridd, CF37 4PS
• Sold Oct 2019£131,000 | 3 Bed House23, Sion Street, Pontypridd, CF37 4SD23, Sion Street, Pontypridd, CF37 4SD
• Sold Oct 2019£106,000 | 3 Bed House17, West Street, Pontypridd, CF37 4PS17, West Street, Pontypridd, CF37 4PS

Our analysis of the public data ranks 21, Sion Street, Pontypridd as the 7th largest and the 18th most expensive of the 65 addresses on Sion Street, Pontypridd, CF37.

Against the CF37 postcode district average, it is £24k less expensive than the typical property.

• Pontypridd

  |

  900 m away
• Trefforest

  |

  1.9 km away
• Trehafod

  |

  3.1 km away

Environment Agency data suggests this area has a Very Low risk of flooding.