55, William Street, Caerphilly occupies a 348 m² plot as recorded by HM Land Registry.

Of the 28 other houses in this postcode, 23 have recorded plot sizes, and this one ranks as the largest.

55, William Street, Caerphilly has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 13 Oct 2015.

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

55, William Street, Caerphilly last changed hands on 17th June 2021, selling for £205,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has risen by 50.7% since June 2021.

• Sold Jun 2021£205,000
• Sold Sep 2016£175,500
• Sold Jun 2001£85,000

Land Registry records and our Estate Agent network show 74 sales of comparable properties within 1.1 kilometres of 55, William Street, Caerphilly since 2019.

Most recently, 2, Llanfabon Drive, Caerphilly, CF83 8GJ, a freehold house, sold at £235,000 on the 27th March 2026.

Read more about house prices in CF83.

• Sold Mar 2026£235,000 | 3 Bed House2, Llanfabon Drive, Caerphilly, CF83 8GJ2, Llanfabon Drive, Caerphilly, CF83 8GJ
• Sold Jan 2026£285,000 | 3 Bed House10, Summerfield Lane, Caerphilly, CF83 8RE10, Summerfield Lane, Caerphilly, CF83 8RE
• Sold Jan 2026£270,000 | 3 Bed House26, St. Davids Drive, Caerphilly, CF83 8RH26, St. Davids Drive, Caerphilly, CF83 8RH
• Sold Dec 2025£220,000 | 3 Bed House11, Tyn Y Wern Terrace, Caerphilly, CF83 8FP11, Tyn Y Wern Terrace, Caerphilly, CF83 8FP
• Sold Nov 2025£255,000 | 3 Bed House53, William Street, Caerphilly, CF83 8FX53, William Street, Caerphilly, CF83 8FX
• Sold Jul 2025£268,000 | 3 Bed House24, Summerfield Lane, Caerphilly, CF83 8RE24, Summerfield Lane, Caerphilly, CF83 8RE
• Sold Jul 2025£315,000 | 3 Bed House10A, St. Margarets Close, Caerphilly, CF83 8BH10A, St. Margarets Close, Caerphilly, CF83 8BH
• Sold Jun 2025£200,000 | 3 Bed House16, Summerfield Lane, Caerphilly, CF83 8RE16, Summerfield Lane, Caerphilly, CF83 8RE
• Sold Jun 2025£232,000 | 3 Bed House41, Ridgeway, Caerphilly, CF83 8RD41, Ridgeway, Caerphilly, CF83 8RD
• Sold Apr 2025£270,000 | 3 Bed House29, Ridgeway, Caerphilly, CF83 8RB29, Ridgeway, Caerphilly, CF83 8RB
• Sold Apr 2025£255,000 | 3 Bed House51, Ridgeway, Caerphilly, CF83 8RD51, Ridgeway, Caerphilly, CF83 8RD
• Sold Oct 2023£270,000 | 3 Bed House2, St. Margarets Close, Caerphilly, CF83 8BH2, St. Margarets Close, Caerphilly, CF83 8BH
• Sold Jul 2022£160,000 | 3 Bed House9, Tyn Y Wern Terrace, Caerphilly, CF83 8FP9, Tyn Y Wern Terrace, Caerphilly, CF83 8FP
• Sold Jun 2022£525,000 | 3 Bed House28, Pantglas Industrial Estate, Caerphilly, CF83 8DR28, Pantglas Industrial Estate, Caerphilly, CF83 8DR
• Sold Jun 2022£205,000 | 3 Bed House15, Lower Glyn Gwyn Street, Caerphilly, CF83 8GA15, Lower Glyn Gwyn Street, Caerphilly, CF83 8GA
• Sold Feb 2021£3,360,000 | 3 Bed HouseUnit 12A, Pantglas Industrial Estate, Caerphilly, CF83 8DRUnit 12A, Pantglas Industrial Estate, Caerphilly, CF83 8DR
• Sold Jun 2020£149,200 | 3 Bed House16, Ridgeway, Caerphilly, CF83 8RB16, Ridgeway, Caerphilly, CF83 8RB
• Sold Apr 2020£245,000 | 3 Bed House24A, Pantglas Industrial Estate, Caerphilly, CF83 8DR24A, Pantglas Industrial Estate, Caerphilly, CF83 8DR
• Sold Feb 2020£300,000 | 3 Bed House22, Ridgeway, Caerphilly, CF83 8RB22, Ridgeway, Caerphilly, CF83 8RB
• Sold Nov 2019£165,000 | 3 Bed House12, Tyn Y Wern Terrace, Caerphilly, CF83 8FP12, Tyn Y Wern Terrace, Caerphilly, CF83 8FP

Our analysis of the public data ranks 55, William Street, Caerphilly as the 49th largest and the 3rd most expensive of the 71 addresses on William Street, Trethomas, Caerphilly, CF83.

Against the CF83 postcode district average, it is £22k more expensive than the typical property.

• Energlyn & Churchill Park

  |

  3.6 km away
• Caerphilly

  |

  3.7 km away
• Llanbradach

  |

  3.8 km away

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