HM Land Registry records the plot of land for 17, William Street, Caerphilly as measuring 109 m².

That makes it the 25th largest plot in the postcode, where 37 of the 42 other houses have recorded plot data.

17, William Street, Caerphilly has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 12 Nov 2015.

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 17, William Street, Caerphilly completed on 2nd April 2024 at £175,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold 4 times.

Values of comparable properties have risen by 33.1% over the period since April 2024.

• Sold Apr 2024£175,000
• Sold Jul 2009£76,750
• Sold Nov 2006£118,000

Since 2018 91 properties similar to 17, 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 10th April 2026, was 2 Central Houses, Caerphilly, CF83 8BS, a freehold house which sold for £205,000.

Read more about house prices in CF83.

• Sold Apr 2026£205,000 | 3 Bed House2 Central Houses, Caerphilly, CF83 8BS2 Central Houses, Caerphilly, CF83 8BS
• Sold Sep 2025£230,000 | 4 Bed House6, Standard Street, Caerphilly, CF83 8DE6, Standard Street, Caerphilly, CF83 8DE
• Sold Aug 2025£215,000 | 4 Bed House6 Ystrad Buildings, Caerphilly, CF83 8BT6 Ystrad Buildings, Caerphilly, CF83 8BT
• Sold Jul 2025£162,000 | 4 Bed House56, William Street, Caerphilly, CF83 8FX56, William Street, Caerphilly, CF83 8FX
• Sold Apr 2025£147,000 | 3 Bed House8, Thomas Street, Caerphilly, CF83 8DP8, Thomas Street, Caerphilly, CF83 8DP
• Sold Nov 2024£185,000 | 4 Bed House78, William Street, Caerphilly, CF83 8FX78, William Street, Caerphilly, CF83 8FX
• Sold Nov 2024£149,500 | 3 Bed House34, Thomas Street, Caerphilly, CF83 8DP34, Thomas Street, Caerphilly, CF83 8DP
• Sold Jun 2024£178,000 | 4 Bed House7, Coronation Street, Caerphilly, CF83 8DL7, Coronation Street, Caerphilly, CF83 8DL
• Sold Nov 2023£153,000 | 3 Bed House49, William Street, Caerphilly, CF83 8DQ49, William Street, Caerphilly, CF83 8DQ
• Sold May 2022£180,000 | 4 Bed House89, James Street, Caerphilly, CF83 8FY89, James Street, Caerphilly, CF83 8FY
• Sold Apr 2022£138,500 | 3 Bed House31, Mary Street, Caerphilly, CF83 8HN31, Mary Street, Caerphilly, CF83 8HN
• Sold Dec 2021£166,000 | 4 Bed House92, James Street, Caerphilly, CF83 8FY92, James Street, Caerphilly, CF83 8FY
• Sold Dec 2021£162,000 | 4 Bed House3 Ystrad Buildings, Caerphilly, CF83 8BT3 Ystrad Buildings, Caerphilly, CF83 8BT
• Sold Sep 2021£158,000 | 3 Bed House50, Mary Street, Caerphilly, CF83 8HN50, Mary Street, Caerphilly, CF83 8HN
• Sold Jun 2021£115,000 | 4 Bed House2, Coronation Street, Caerphilly, CF83 8DL2, Coronation Street, Caerphilly, CF83 8DL
• Sold Jun 2021£158,000 | 4 Bed House68, James Street, Caerphilly, CF83 8FY68, James Street, Caerphilly, CF83 8FY
• 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
• Sold Dec 2018£125,000 | 3 Bed House22, Mary Street, Caerphilly, CF83 8HN22, Mary Street, Caerphilly, CF83 8HN
• Sold May 2018£133,500 | 3 Bed House24, Standard Street, Caerphilly, CF83 8DE24, Standard Street, Caerphilly, CF83 8DE

Of the 71 addresses on William Street, Trethomas, Caerphilly, CF83, 17, William Street, Caerphilly comes out as the 7th largest and the 9th most expensive in our analysis of the public data.

It is also £31k 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

  |

  3.8 km away

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