HM Land Registry records the plot of land for 31, William Street, Caerphilly as measuring 113 m².

That makes it the 14th largest plot in the postcode, where 37 of the 42 other houses have recorded plot data.

The most recent sale of 31, William Street, Caerphilly completed on 14th December 2007 at £120,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 93.9% over the period since December 2007.

• Sold Dec 2007£120,000

Since 2019 188 properties similar to 31, William Street, Caerphilly have sold within a radius of 1.1 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 23rd February 2026, was 44, Mary Street, Caerphilly, CF83 8HN, a freehold house which sold for £170,000.

Read more about house prices in CF83.

• 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 Jul 2025£162,000 | 4 Bed House56, William Street, Caerphilly, CF83 8FX56, William Street, Caerphilly, CF83 8FX
• Sold Jun 2025£155,000 | 3 Bed House11, Thomas Street, Caerphilly, CF83 8DP11, Thomas Street, Caerphilly, CF83 8DP
• 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 Nov 2024£149,500 | 3 Bed House34, Thomas Street, Caerphilly, CF83 8DP34, Thomas Street, Caerphilly, CF83 8DP
• Sold Oct 2024£172,000 | 3 Bed House14, Standard Street, Caerphilly, CF83 8DE14, Standard Street, Caerphilly, CF83 8DE
• Sold Oct 2024£160,000 | 3 Bed House13, William Street, Caerphilly, CF83 8DQ13, William Street, Caerphilly, CF83 8DQ
• 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£180,000 | 3 Bed House48, Thomas Street, Caerphilly, CF83 8DP48, Thomas Street, Caerphilly, CF83 8DP
• Sold Jun 2024£178,000 | 4 Bed House7, Coronation Street, Caerphilly, CF83 8DL7, Coronation Street, Caerphilly, CF83 8DL
• Sold Apr 2024£175,000 | 4 Bed House17, William Street, Caerphilly, CF83 8DQ17, William Street, Caerphilly, CF83 8DQ
• Sold Feb 2024£150,000 | 3 Bed House6, Mary Street, Caerphilly, CF83 8HN6, Mary Street, Caerphilly, CF83 8HN
• Sold Nov 2023£153,000 | 3 Bed House49, William Street, Caerphilly, CF83 8DQ49, William Street, Caerphilly, CF83 8DQ
• Sold Apr 2022£138,500 | 3 Bed House31, Mary Street, Caerphilly, CF83 8HN31, Mary Street, Caerphilly, CF83 8HN
• Sold Sep 2021£158,000 | 3 Bed House50, Mary Street, Caerphilly, CF83 8HN50, Mary Street, Caerphilly, CF83 8HN
• Sold Apr 2021£120,000 | 4 Bed House29, Mary Street, Caerphilly, CF83 8HN29, Mary Street, Caerphilly, CF83 8HN
• Sold Aug 2019£100,000 | 3 Bed House19, Thomas Street, Caerphilly, CF83 8DP19, Thomas Street, Caerphilly, CF83 8DP

Of the 71 addresses on William Street, Trethomas, Caerphilly, CF83, 31, William Street, Caerphilly comes out as the 12th largest and the 20th most expensive in our analysis of the public data.

It is also £44k less expensive than the average property across the CF83 district.

• Caerphilly

  |

  3.5 km away
• Energlyn & Churchill Park

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  3.5 km away
• Llanbradach

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  3.8 km away

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