According to data from HM Land Registry, 1, William Street, Caerphilly sits on a plot of 103 m².

We have plot size data on 37 out of 42 other houses in the postcode and 1, William Street, Caerphilly sits on the 36th largest plot.

1, William Street, Caerphilly has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 27 Jan 2023.

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, 1, William Street, Caerphilly was last sold on 14th May 2013 for £75,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since May 2013, the market for similar properties has risen by 127.9%.

• Sold May 2013£75,000

According to the Land Registry and our network of Estate Agents, there have been 198 sales of properties similar to 1, William Street, Caerphilly within a radius of 1.1 kilometres since 2022.

The most recent example is 12, Coronation Street, Caerphilly, CF83 8DL, a freehold house which sold for £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 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 Nov 2022£161,000 | 3 Bed House9, William Street, Caerphilly, CF83 8DQ9, William Street, Caerphilly, CF83 8DQ
• Sold Jun 2022£155,000 | 3 Bed House35, William Street, Caerphilly, CF83 8DQ35, William Street, Caerphilly, CF83 8DQ

William Street, Trethomas, Caerphilly, CF83 has a total of 71 addresses. According to our analysis of all the public data, 1, William Street, Caerphilly is the 57th largest and the 50th most expensive property on the street.

When compared to the postcode district it is £59k less expensive than the average property in CF83.

• 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

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