17, William Street, Porth occupies a 123 m² plot as recorded by HM Land Registry.

Of the 33 other houses in this postcode, 30 have recorded plot sizes, and this one ranks as the 20th largest.

17, William Street, Porth has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 19 Nov 2014.

The property is not connected to mains gas and has partial double glazing. It is heated using a boiler and radiators (mains gas).

17, William Street, Porth last changed hands on 22nd January 2016, selling for £85,000. 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 73.2% since January 2016.

• Sold Jan 2016£85,000
• Sold Mar 2015£52,000

Land Registry records and our Estate Agent network show 331 sales of comparable properties within 1.1 kilometres of 17, William Street, Porth since 2017.

Most recently, 2, Llanwonno Road, Porth, CF39 0HU, a freehold house, sold at £135,000 on the 2nd April 2026.

Read more about house prices in CF39.

• Sold Apr 2026£135,000 | 3 Bed House2, Llanwonno Road, Porth, CF39 0HU2, Llanwonno Road, Porth, CF39 0HU
• Sold Jan 2026£142,000 | 3 Bed House23, Standard Terrace, Porth, CF39 0HG23, Standard Terrace, Porth, CF39 0HG
• Sold Dec 2025£128,000 | 3 Bed House38, Church Terrace, Porth, CF39 0ET38, Church Terrace, Porth, CF39 0ET
• Sold Nov 2025£105,000 | 3 Bed House54, Heath Terrace, Porth, CF39 0HS54, Heath Terrace, Porth, CF39 0HS
• Sold Jul 2025£125,000 | 3 Bed House62, Ynyshir Road, Porth, CF39 0EN62, Ynyshir Road, Porth, CF39 0EN
• Sold Mar 2025£90,000 | 3 Bed House13, Graig Road, Porth, CF39 0NS13, Graig Road, Porth, CF39 0NS
• Sold Feb 2025£85,000 | 3 Bed House29, Standard Terrace, Porth, CF39 0HG29, Standard Terrace, Porth, CF39 0HG
• Sold Jan 2025£120,000 | 3 Bed House3, Weston Terrace, Porth, CF39 0ER3, Weston Terrace, Porth, CF39 0ER
• Sold Jun 2024£110,000 | 3 Bed House31, William Street, Porth, CF39 0EU31, William Street, Porth, CF39 0EU
• Sold Dec 2023£100,000 | 3 Bed House76, Ynyshir Road, Porth, CF39 0EN76, Ynyshir Road, Porth, CF39 0EN
• Sold Dec 2023£125,000 | 3 Bed House1, William Street, Porth, CF39 0EU1, William Street, Porth, CF39 0EU
• Sold Apr 2023£75,000 | 3 Bed House47, William Street, Porth, CF39 0EY47, William Street, Porth, CF39 0EY
• Sold Mar 2023£145,000 | 3 Bed House6, Graig Road, Porth, CF39 0NS6, Graig Road, Porth, CF39 0NS
• Sold Nov 2022£105,000 | 3 Bed House15, Graig Road, Porth, CF39 0NS15, Graig Road, Porth, CF39 0NS
• Sold Nov 2022£100,000 | 3 Bed House45, Ynys Street, Porth, CF39 0HL45, Ynys Street, Porth, CF39 0HL
• Sold Jul 2022£123,000 | 3 Bed House60, William Street, Porth, CF39 0EY60, William Street, Porth, CF39 0EY
• Sold Apr 2022£105,000 | 3 Bed House20, Weston Terrace, Porth, CF39 0ER20, Weston Terrace, Porth, CF39 0ER
• Sold Mar 2021£125,000 | 3 Bed House15, Weston Terrace, Porth, CF39 0ER15, Weston Terrace, Porth, CF39 0ER
• Sold Oct 2018£78,000 | 3 Bed House52, William Street, Porth, CF39 0EY52, William Street, Porth, CF39 0EY
• Sold Aug 2017£69,000 | 3 Bed House30, Church Terrace, Porth, CF39 0ET30, Church Terrace, Porth, CF39 0ET

Our analysis of the public data ranks 17, William Street, Porth as the 32nd largest and the 53rd most expensive of the 68 addresses on William Street, Porth, CF39.

Against the CF39 postcode district average, it is £20k less expensive than the typical property.

• Porth

  |

  1.4 km away
• Dinas (Rhondda)

  |

  2.1 km away
• Trehafod

  |

  2.6 km away

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