HM Land Registry records the plot of land for 21, Ynys Street, Porth as measuring 85 m².

That makes it the 12th largest plot in the postcode, where 24 of the 27 other houses have recorded plot data.

21, Ynys Street, Porth has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 28 Jun 2025.

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

The most recent sale of 21, Ynys Street, Porth completed on 23rd July 2010 at £75,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have risen by 80.7% over the period since July 2010.

Since 2018 207 properties similar to 21, Ynys Street, Porth have sold within a radius of 1.2 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 21st April 2026, was 97, Ynyshir Road, Porth, CF39 0EN, a freehold house which sold for £160,000.

Read more about house prices in CF39.

• Sold Apr 2026£160,000 | 3 Bed House97, Ynyshir Road, Porth, CF39 0EN97, Ynyshir Road, Porth, CF39 0EN
• 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 Oct 2025£135,000 | 3 Bed House10, Church Terrace, Porth, CF39 0HE10, Church Terrace, Porth, CF39 0HE
• Sold Sep 2025£125,000 | 3 Bed House23, Ynys Street, Porth, CF39 0HH23, Ynys Street, Porth, CF39 0HH
• Sold Jul 2025£86,500 | 3 Bed House16, Graig Road, Porth, CF39 0NS16, Graig Road, Porth, CF39 0NS
• Sold Jan 2025£120,000 | 3 Bed House3, Weston Terrace, Porth, CF39 0ER3, Weston Terrace, Porth, CF39 0ER
• Sold Feb 2024£80,000 | 3 Bed House7, Standard Terrace, Porth, CF39 0HG7, Standard Terrace, Porth, CF39 0HG
• Sold Apr 2023£60,001 | 3 Bed House35, Standard View, Porth, CF39 0HR35, Standard View, Porth, CF39 0HR
• Sold Feb 2023£92,500 | 3 Bed House30, Graig Road, Porth, CF39 0NS30, Graig Road, Porth, CF39 0NS
• Sold Feb 2023£110,000 | 3 Bed House32, Ynys Street, Porth, CF39 0HL32, Ynys Street, Porth, CF39 0HL
• Sold Nov 2022£136,000 | 3 Bed House29, Graig Road, Porth, CF39 0NS29, Graig Road, Porth, CF39 0NS
• Sold Nov 2022£100,000 | 3 Bed House45, Ynys Street, Porth, CF39 0HL45, Ynys Street, Porth, CF39 0HL
• Sold Apr 2022£105,000 | 3 Bed House20, Weston Terrace, Porth, CF39 0ER20, Weston Terrace, Porth, CF39 0ER
• Sold Mar 2022£108,000 | 3 Bed House24, Graig Road, Porth, CF39 0NS24, Graig Road, Porth, CF39 0NS
• Sold Feb 2022£81,000 | 3 Bed House12, Weston Terrace, Porth, CF39 0ER12, Weston Terrace, Porth, CF39 0ER
• Sold Dec 2021£118,000 | 3 Bed House17, Ynys Street, Porth, CF39 0HH17, Ynys Street, Porth, CF39 0HH
• Sold Mar 2021£125,000 | 3 Bed House15, Weston Terrace, Porth, CF39 0ER15, Weston Terrace, Porth, CF39 0ER
• Sold Oct 2018£65,000 | 3 Bed House46, Ynys Street, Porth, CF39 0HL46, Ynys Street, Porth, CF39 0HL
• Sold Aug 2018£46,003 | 3 Bed House39, Ynys Street, Porth, CF39 0HL39, Ynys Street, Porth, CF39 0HL

Of the 54 addresses on Ynys Street, Porth, CF39, 21, Ynys Street, Porth comes out as the 41st largest and the 30th most expensive in our analysis of the public data.

It is also £17k less expensive than the average property across the CF39 district.

• Porth

  |

  1.8 km away
• Dinas (Rhondda)

  |

  2.3 km away
• Trehafod

  |

  2.8 km away

The flood risk here is rated Very Low, based on Environment Agency data.