According to data from HM Land Registry, 21, Llanarth Street, Caerphilly sits on a plot of 200 m².

We have plot size data on 15 out of 21 other houses in the postcode and 21, Llanarth Street, Caerphilly sits on the 12th largest plot.

21, Llanarth Street, Caerphilly has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 11 Feb 2026.

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, 21, Llanarth Street, Caerphilly was last sold on 10th September 2010 for £132,500 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since September 2010, the market for similar properties has risen by 61.4%.

• Sold Sep 2010£132,500

According to the Land Registry and our network of Estate Agents, there have been 128 sales of properties similar to 21, Llanarth Street, Caerphilly within a radius of 2.5 kilometres since 2007.

The most recent example is 21, Graig View, Caerphilly, CF83 8SD, a freehold house which sold for £225,000 on the 23rd January 2026.

Read more about house prices in CF83.

• Sold Jan 2026£225,000 | 3 Bed House21, Graig View, Caerphilly, CF83 8SD21, Graig View, Caerphilly, CF83 8SD
• Sold Dec 2025£227,500 | 3 Bed House40, Graig View, Caerphilly, CF83 8SE40, Graig View, Caerphilly, CF83 8SE
• Sold May 2025£252,000 | 3 Bed House14, Chatham Street, Caerphilly, CF83 8SH14, Chatham Street, Caerphilly, CF83 8SH
• Sold Dec 2022£185,000 | 3 Bed House23, Llanarth Street, Caerphilly, CF83 8SJ23, Llanarth Street, Caerphilly, CF83 8SJ
• Sold Dec 2022£240,000 | 3 Bed House7, Crown Walk, Caerphilly, CF83 8SX7, Crown Walk, Caerphilly, CF83 8SX
• Sold Mar 2022£180,000 | 3 Bed House6, Crown Walk, Caerphilly, CF83 8SX6, Crown Walk, Caerphilly, CF83 8SX
• Sold Dec 2021£235,000 | 3 Bed House19, Graig View, Caerphilly, CF83 8SD19, Graig View, Caerphilly, CF83 8SD
• Sold Oct 2021£143,500 | 3 Bed House27, Graig View, Caerphilly, CF83 8SD27, Graig View, Caerphilly, CF83 8SD
• Sold Jul 2021£157,500 | 3 Bed House28, Graig View, Caerphilly, CF83 8SE28, Graig View, Caerphilly, CF83 8SE
• Sold May 2021£163,000 | 3 Bed House25, Llanarth Street, Caerphilly, CF83 8SJ25, Llanarth Street, Caerphilly, CF83 8SJ
• Sold Nov 2020£198,000 | 3 Bed House13, Llanarth Street, Caerphilly, CF83 8SJ13, Llanarth Street, Caerphilly, CF83 8SJ
• Sold Dec 2019£234,000 | 3 Bed House6, Llanarth Street, Caerphilly, CF83 8SJ6, Llanarth Street, Caerphilly, CF83 8SJ
• Sold Oct 2018£116,000 | 3 Bed House38, Graig View, Caerphilly, CF83 8SE38, Graig View, Caerphilly, CF83 8SE
• Sold Oct 2018£173,000 | 3 Bed House12, Graig View, Caerphilly, CF83 8SE12, Graig View, Caerphilly, CF83 8SE
• Sold Aug 2018£127,500 | 3 Bed House39, Graig View, Caerphilly, CF83 8SD39, Graig View, Caerphilly, CF83 8SD
• Sold Feb 2018£176,500 | 3 Bed House19, Llanarth Street, Caerphilly, CF83 8SJ19, Llanarth Street, Caerphilly, CF83 8SJ
• Sold Oct 2014£127,500 | 3 Bed House44, Graig View, Caerphilly, CF83 8SE44, Graig View, Caerphilly, CF83 8SE
• Sold Dec 2012£105,000 | 3 Bed House15, Llanarth Street, Caerphilly, CF83 8SJ15, Llanarth Street, Caerphilly, CF83 8SJ
• Sold Apr 2009£125,000 | 3 Bed House8, Graig View, Caerphilly, CF83 8SE8, Graig View, Caerphilly, CF83 8SE
• Sold Sep 2007£159,950 | 3 Bed House30, Graig View, Caerphilly, CF83 8SE30, Graig View, Caerphilly, CF83 8SE

Llanarth Street, Machen, Caerphilly, CF83 has a total of 21 addresses. According to our analysis of all the public data, 21, Llanarth Street, Caerphilly is the 9th largest and the 7th most expensive property on the street.

When compared to the postcode district it is £3k more expensive than the average property in CF83.

• Risca & Pontymister

  |

  3.0 km away
• Crosskeys

  |

  3.0 km away
• Rogerstone

  |

  4.5 km away

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