9, William Street, Caerphilly occupies a 115 m² plot as recorded by HM Land Registry.

Of the 42 other houses in this postcode, 37 have recorded plot sizes, and this one ranks as the 11th largest.

9, William Street, Caerphilly has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 22 Feb 2022.

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

9, William Street, Caerphilly last changed hands on 1st November 2022, selling for £161,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 4 times since 1995.

The market for similar properties has risen by 30.0% since November 2022.

• Sold Nov 2022£161,000
• Sold Oct 2018£119,950
• Sold Jul 2006£109,950

Land Registry records and our Estate Agent network show 209 sales of comparable properties within 1.1 kilometres of 9, William Street, Caerphilly since 2022.

Most recently, 12, Coronation Street, Caerphilly, CF83 8DL, a freehold house, sold at £149,000 on the 8th April 2026.

Read more about house prices in CF83.

• Sold Apr 2026£149,000 | 3 Bed House12, Coronation Street, Caerphilly, CF83 8DL12, Coronation Street, Caerphilly, CF83 8DL
• Sold Mar 2026£188,000 | 3 Bed House42, Mary Street, Caerphilly, CF83 8HN42, Mary Street, Caerphilly, CF83 8HN
• Sold Feb 2026£170,000 | 3 Bed House44, Mary Street, Caerphilly, CF83 8HN44, Mary Street, Caerphilly, CF83 8HN
• Sold Dec 2025£205,000 | 3 Bed House26, William Street, Caerphilly, CF83 8DQ26, William Street, Caerphilly, CF83 8DQ
• Sold Oct 2025£154,000 | 3 Bed House6, William Street, Caerphilly, CF83 8DQ6, William Street, Caerphilly, CF83 8DQ
• Sold Jun 2025£155,000 | 3 Bed House11, Thomas Street, Caerphilly, CF83 8DP11, Thomas Street, Caerphilly, CF83 8DP
• Sold Apr 2025£141,000 | 3 Bed House47, Mary Street, Caerphilly, CF83 8HN47, Mary Street, Caerphilly, CF83 8HN
• Sold Apr 2025£147,000 | 3 Bed House8, Thomas Street, Caerphilly, CF83 8DP8, Thomas Street, Caerphilly, CF83 8DP
• Sold Dec 2024£168,650 | 3 Bed House30, Thomas Street, Caerphilly, CF83 8DP30, Thomas Street, Caerphilly, CF83 8DP
• Sold Dec 2024£137,500 | 3 Bed House1, Thomas Street, Caerphilly, CF83 8DP1, Thomas Street, Caerphilly, CF83 8DP
• Sold Oct 2024£160,000 | 3 Bed House13, William Street, Caerphilly, CF83 8DQ13, William Street, Caerphilly, CF83 8DQ
• Sold Sep 2024£160,000 | 3 Bed House21, Thomas Street, Caerphilly, CF83 8DP21, Thomas Street, Caerphilly, CF83 8DP
• Sold Sep 2024£163,500 | 3 Bed House20, Mary Street, Caerphilly, CF83 8HN20, Mary Street, Caerphilly, CF83 8HN
• Sold Aug 2024£157,000 | 3 Bed House41, William Street, Caerphilly, CF83 8DQ41, William Street, Caerphilly, CF83 8DQ
• Sold Aug 2024£159,000 | 3 Bed House29, Thomas Street, Caerphilly, CF83 8DP29, Thomas Street, Caerphilly, CF83 8DP
• Sold Mar 2024£180,000 | 3 Bed House30, Mary Street, Caerphilly, CF83 8HN30, Mary Street, Caerphilly, CF83 8HN
• Sold Feb 2024£145,000 | 3 Bed House16, Mary Street, Caerphilly, CF83 8HN16, Mary Street, Caerphilly, CF83 8HN
• Sold Sep 2023£140,000 | 3 Bed House33, Mary Street, Caerphilly, CF83 8HN33, Mary Street, Caerphilly, CF83 8HN
• Sold Aug 2023£187,500 | 3 Bed House19, Mary Street, Caerphilly, CF83 8HN19, Mary Street, Caerphilly, CF83 8HN
• Sold Jun 2022£155,000 | 3 Bed House35, William Street, Caerphilly, CF83 8DQ35, William Street, Caerphilly, CF83 8DQ

Our analysis of the public data ranks 9, William Street, Caerphilly as the 48th largest and the 44th most expensive of the 71 addresses on William Street, Trethomas, Caerphilly, CF83.

Against the CF83 postcode district average, it is £58k less expensive than the typical property.

• Caerphilly

  |

  3.5 km away
• Energlyn & Churchill Park

  |

  3.5 km away
• Llanbradach

  |

  3.8 km away

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