William Street, Trethomas, Caerphilly

House prices, sold prices and local information for CF83 8FX, CF83 8DQ.

Average price (last 12 months)
£223,333
3 sales
Average price (since 2016)
£149,357
36 sales
Price range
£103k – £255k
lowest to highest sale
Last sale
8 May 2026
CF83 8FX

At a glance

House prices£223k average11% below the Caerphilly average Crime70 reportedWithin about a mile, latest month Flood riskNo flood warning areasFrom rivers or the sea Nearest station44 min walkEnerglyn & Churchill Park station Ultrafast broadband100% of homesNational average 80%

36 property sales on William Street, Trethomas, Caerphilly have been recorded by HM Land Registry since 2016. In the last 12 months 3 homes sold here for an average of £223,333. Most sales here are terraced homes, which have sold for an average of £144,613. That is 11% below the Caerphilly average of £251,590 over the same period. 9 homes here have sold more than once since 2016; 8 of them sold for more the second time.

House prices on William Street compared

William Street£223,333
CF83 postcode area£251,590
Caerphilly£251,590
England & Wales£356,718

Average sale price over the last 12 months. See all CF83 house prices.

Average sale price by year

2016: £134,863 (4 sales)2016£135k2017: £111,000 (2 sales)2017£111k2018: £122,800 (3 sales)2018£123k2019: £120,625 (4 sales)2019£121k2020: £131,000 (2 sales)2020£131k2021: £153,875 (4 sales)2021£154k2022: £151,200 (5 sales)2022£151k2023: £153,000 (1 sales)2023£153k2024: £172,333 (3 sales)2024£172k2025: £178,714 (7 sales)2025£179k2026: £210,000 (1 sales)2026£210k

Prices by property type

TypeSalesAverage priceLast sold
Terraced34£144,6138 May 2026
Detached2£230,00012 Nov 2025

Sold prices on William Street

AddressDatePriceTypeTenure
52, William Street CF83 8FX 8 May 2026£210,000 TerracedFreehold
4, William Street CF83 8DQ 30 Jan 2026£132,000 TerracedFreehold
26, William Street CF83 8DQ 19 Dec 2025£205,000 TerracedFreehold
53, William Street CF83 8FX 12 Nov 2025£255,000 DetachedFreehold
6, William Street CF83 8DQ 1 Oct 2025£154,000 TerracedFreehold
7, William Street CF83 8DQ 22 Sep 2025£140,000 TerracedFreehold
84, William Street CF83 8FX 25 Jul 2025£175,000 TerracedFreehold
56, William Street CF83 8FX 18 Jul 2025£162,000 TerracedFreehold
72, William Street CF83 8FX 18 Jul 2025£160,000 TerracedFreehold
78, William Street CF83 8FX 25 Nov 2024£185,000 TerracedFreehold
13, William Street CF83 8DQ 4 Oct 2024£160,000 TerracedFreehold
41, William Street CF83 8DQ 23 Aug 2024£157,000 TerracedFreehold
17, William Street CF83 8DQ 2 Apr 2024£175,000 TerracedFreehold
49, William Street CF83 8DQ 24 Nov 2023£153,000 TerracedFreehold
66, William Street CF83 8FX 5 Dec 2022£160,000 TerracedFreehold
9, William Street CF83 8DQ 1 Nov 2022£161,000 TerracedFreehold
35, William Street CF83 8DQ 20 Jun 2022£155,000 TerracedFreehold
70, William Street CF83 8FX 21 Jan 2022£125,000 TerracedFreehold
49, William Street CF83 8DQ 14 Jan 2022£155,000 TerracedFreehold
92, William Street CF83 8FX 5 Nov 2021£140,000 TerracedFreehold
70, William Street CF83 8FX 29 Jul 2021£125,000 TerracedFreehold
55, William Street CF83 8FX 17 Jun 2021£205,000 DetachedFreehold
78, William Street CF83 8FX 13 May 2021£123,000 TerracedFreehold
26, William Street CF83 8DQ 5 Feb 2021£147,500 TerracedFreehold
37, William Street CF83 8DQ 25 Nov 2020£115,000 TerracedFreehold
52, William Street CF83 8FX 12 Mar 2020£147,000 TerracedFreehold
84, William Street CF83 8FX 13 Dec 2019£128,000 TerracedFreehold
2, William Street CF83 8DQ 14 Feb 2019£122,000 TerracedFreehold
90, William Street CF83 8FX 1 Feb 2019£110,000 TerracedFreehold
13, William Street CF83 8DQ 18 Jan 2019£122,500 TerracedFreehold
9, William Street CF83 8DQ 26 Oct 2018£119,950 TerracedFreehold
66, William Street CF83 8FX 6 Jul 2018£129,950 TerracedFreehold
8, William Street CF83 8DQ 1 Feb 2018£118,500 TerracedFreehold
60, William Street CF83 8FX 13 Dec 2017£103,000 TerracedFreehold
66, William Street CF83 8FX 28 Apr 2017£119,000 TerracedFreehold
20, William Street CF83 8DQ 20 Feb 2017£73,000 TerracedFreehold
52, William Street CF83 8FX 14 Dec 2016£139,950 TerracedFreehold
55, William Street CF83 8FX 29 Sep 2016£175,500 TerracedFreehold
94, William Street CF83 8FX 26 May 2016£121,000 TerracedFreehold
84, William Street CF83 8FX 19 May 2016£103,000 TerracedFreehold

Sale prices are as recorded by HM Land Registry. Some sales (for example repossessions and company purchases) are listed but left out of the averages.

Sale history: homes sold more than once

AddressSalesChange
52, William Street £139,950 (Dec 2016) → £147,000 (Mar 2020) → £210,000 (May 2026) +50%
over 9 yrs
26, William Street £147,500 (Feb 2021) → £205,000 (Dec 2025) +39%
over 5 yrs
84, William Street £103,000 (May 2016) → £128,000 (Dec 2019) → £175,000 (Jul 2025) +70%
over 9 yrs
78, William Street £123,000 (May 2021) → £185,000 (Nov 2024) +50%
over 4 yrs
13, William Street £122,500 (Jan 2019) → £160,000 (Oct 2024) +31%
over 6 yrs
49, William Street £155,000 (Jan 2022) → £153,000 (Nov 2023) -1%
over 2 yrs
66, William Street £119,000 (Apr 2017) → £129,950 (Jul 2018) → £160,000 (Dec 2022) +34%
over 6 yrs
9, William Street £119,950 (Oct 2018) → £161,000 (Nov 2022) +34%
over 4 yrs
55, William Street £175,500 (Sep 2016) → £205,000 (Jun 2021) +17%
over 5 yrs

Buying on William Street?

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Crime and flood risk near William Street

Crime

70 crimes were reported within about a mile of William Street in August 2026.

Anti-social behaviour25
Violence & sexual offences21
Public order7
Criminal damage & arson5
Other theft4
Shoplifting2

Source: data.police.uk. Locations are approximate and cover the surrounding area, not just this street.

Flood risk

William Street is not in or near any Environment Agency flood warning or alert area.

Flood warning areas cover places at risk from rivers and the sea. Surface water risk isn't included. Check the long-term flood risk for a postcode on GOV.UK.

Getting around and local GPs

Train stations

  • Energlyn & Churchill Park station 2.2 mi · 44 min walk
  • Caerphilly station 2.3 mi · 46 min walk
  • Llanbradach station 2.4 mi · 47 min walk

Nearest bus stops

  • Trethomas Clinic (adj, Standard Street) 1 min walk
  • Upper Glyn-gwyn Street (before, Addison Way) 2 min walk
  • Upper Glyn-gwyn Street (after, Addison Way) 2 min walk
  • Navigation Street (after, Llanfabon Drive) 4 min walk

GP surgeries

  • Ty Bryn Surgery
    The Bryn, Trethomas, Caerphilly · 0.4 mi
  • Court House Medical Centre
    Heol Bro Wen, Caerphilly · 1.8 mi
  • Market Street Practice
    Tonyfelin Medical Centre, Tonyfelin Surgery, Caerphilly · 1.9 mi
  • The Village Surgery
    Llanbradach Centre For Health, 12 Pencerrig Street, Caerphilly · 2.3 mi

Sources: Department for Transport (NaPTAN) and NHS England practice data. Walking times are estimates from straight-line distance.

Area profile

Homes

HereEng & Wales
Owned67.9%62.5%
Private rented17.1%20.3%
Social rented15.0%17.1%
Households655

People

HereEng & Wales
Under 1520.3%17.4%
Aged 15–6459.2%64.1%
Aged 65+20.5%18.6%
Residents1,529

Broadband

HereUK
Superfast (30Mbit+)100%95%
Ultrafast (300Mbit+)100%80%
Gigabit-capable100%80%

Share of homes on this street's postcodes that can get each speed. UK figure is the average across all postcodes. Source: Ofcom Connected Nations.

Neighbourhood figures cover the surrounding Lower Layer Super Output Area (about 1,500 residents). Sources: Census 2021 (ONS) and the English Indices of Deprivation 2025.

Nearby streets in CF83

See all streets in Caerphilly All streets in CF83