According to data from HM Land Registry, 18, William Street, Porth sits on a plot of 129 m².

We have plot size data on 30 out of 33 other houses in the postcode and 18, William Street, Porth sits on the 6th largest plot.

18, William Street, Porth has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 02 Dec 2011.

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

According to HM Land Registry, 18, William Street, Porth was last sold on 10th February 2017 for £80,000 and was recorded as a freehold house.

The property has had 3 sales since 1995.

Since February 2017, the market for similar properties has risen by 67.4%.

• Sold Feb 2017£80,000
• Sold Mar 2012£76,000
• Sold Mar 2009£65,000

According to the Land Registry and our network of Estate Agents, there have been 301 sales of properties similar to 18, William Street, Porth within a radius of 1.1 kilometres since 2019.

The most recent example is 2, Llanwonno Road, Porth, CF39 0HU, a freehold house which sold for £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 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 Mar 2025£140,000 | 3 Bed House29, Standard View, Porth, CF39 0HR29, Standard View, Porth, CF39 0HR
• 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 Jan 2025£125,000 | 3 Bed House7, Weston Terrace, Porth, CF39 0ER7, Weston Terrace, Porth, CF39 0ER
• Sold Nov 2024£170,000 | 3 Bed House26, Church Terrace, Porth, CF39 0ET26, Church Terrace, Porth, CF39 0ET
• Sold Oct 2024£132,500 | 3 Bed House8, Llanwonno Road, Porth, CF39 0HU8, Llanwonno Road, Porth, CF39 0HU
• Sold Sep 2024£90,000 | 4 Bed House85, Ynyshir Road, Porth, CF39 0EN85, Ynyshir Road, Porth, CF39 0EN
• Sold Jul 2024£112,000 | 3 Bed House22, Graig Road, Porth, CF39 0NS22, Graig Road, Porth, CF39 0NS
• Sold Jun 2024£110,000 | 3 Bed House31, William Street, Porth, CF39 0EU31, William Street, Porth, CF39 0EU
• Sold May 2024£109,000 | 3 Bed House24, Standard View, Porth, CF39 0HR24, Standard View, Porth, CF39 0HR
• Sold Apr 2024£130,000 | 3 Bed House48, Ynys Street, Porth, CF39 0HL48, Ynys Street, Porth, CF39 0HL
• Sold Dec 2023£100,000 | 3 Bed House76, Ynyshir Road, Porth, CF39 0EN76, Ynyshir Road, Porth, CF39 0EN
• 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 Jul 2022£123,000 | 3 Bed House60, William Street, Porth, CF39 0EY60, William Street, Porth, CF39 0EY
• Sold Oct 2019£95,000 | 3 Bed House42, William Street, Porth, CF39 0EY42, William Street, Porth, CF39 0EY

William Street, Porth, CF39 has a total of 68 addresses. According to our analysis of all the public data, 18, William Street, Porth is the 19th largest and the 42nd most expensive property on the street.

When compared to the postcode district it is £15k less expensive than the average property in CF39.

• Porth

  |

  1.4 km away
• Dinas (Rhondda)

  |

  2.1 km away
• Trehafod

  |

  2.6 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.