Key Street Insights
William Street is a residential street with 71 addresses.
It ranks as the 1053rd largest and 262nd most expensive of the 1,141 streets in the CF83 area. The most common property type is a period house built between 1800 and 1911.
The street contains a total of 71 properties: 43 houses and 28 other properties.
- Ave. Sale Price
- £181,720
- 10 Year change
- up 65.8%
- Ave. Rental Price
- £1,210pcm
- 10 Year change
- up 71.5%
- Ave. £ per ft²
- £195/ft²
- Ave. Gross Yield
- 8.0%/year/yr
Key Street Insights
William Street is a residential street with 71 addresses.
It ranks as the 1053rd largest and 262nd most expensive of the 1,141 streets in the CF83 area. The most common property type is a period house built between 1800 and 1911.
The street contains a total of 71 properties: 43 houses and 28 other properties.
- Ave. Sale Price
- £181,720
- 10 Year change
- up 65.8%
- Ave. Rental Price
- £1,210pcm
- 10 Year change
- up 71.5%
- Ave. £ per ft²
- £195/ft²
- Ave. Gross Yield
- 8.0%/year/yr
Explore Properties on William Street, Trethomas, Caerphilly, CF83
- Flat A
Flat
- 1 William Street
3 Bed Period House
- 2 William Street
3 Bed Period House
- 3 William Street
House
- 4 William Street
3 Bed Period House
Sales Market Trends
The last sale on William Street sold for £205,000 on 19th December 2025. Since then prices are up an average of 4.3%.
The current average value in the street is £181,720.
The William Street Sales Market has increased by 65.8% over the last 10 years.
| Period | Year on Year | Average Price |
|---|---|---|
| June 2026 | 2.6% | £181,720 |
| June 2025 | 4.6% | £177,075 |
| June 2024 | 3.6% | £169,330 |
| June 2023 | 1.3% | £163,487 |
| June 2022 | 13.3% | £161,316 |
| June 2021 | 10.1% | £142,424 |
| June 2020 | 4% | £129,317 |
| June 2019 | 3.4% | £124,341 |
| June 2018 | 6% | £120,233 |
| June 2017 | 3.5% | £113,477 |
| June 2016 | 2.4% | £109,602 |
| June 2015 | 3.3% | £106,985 |
| June 2014 | 6.4% | £103,547 |
| June 2013 | -0.1% | £97,357 |
| June 2012 | -0.7% | £97,471 |
| June 2011 | -0.8% | £98,153 |
| June 2010 | 3.7% | £98,955 |
| June 2009 | -13.9% | £95,405 |
| June 2008 | -2.5% | £110,839 |
| June 2007 | 0% | £113,711 |
Rental Market Trends
The current average rental value in the street is £1,210.
The William Street Rental Market has increased by 71.5% over the last 10 years.
| Period | Year on Year | Average Price |
|---|---|---|
| June 2026 | 3.1% | £1,210pcm |
| June 2025 | 5.1% | £1,174pcm |
| June 2024 | 6.7% | £1,117pcm |
| June 2023 | 9.4% | £1,047pcm |
| June 2022 | 12.9% | £957pcm |
| June 2021 | 8.7% | £848pcm |
| June 2020 | 4% | £780pcm |
| June 2019 | 2.1% | £750pcm |
| June 2018 | 2.5% | £734pcm |
| June 2017 | 1.5% | £717pcm |
| June 2016 | 3.3% | £706pcm |
| June 2015 | 2% | £683pcm |
| June 2014 | 1.4% | £670pcm |
| June 2013 | 0.3% | £660pcm |
| June 2012 | -0.3% | £658pcm |
| June 2011 | 1.4% | £660pcm |
| June 2010 | 2% | £651pcm |
| June 2009 | -5.2% | £638pcm |
| June 2008 | -0.1% | £672pcm |
| June 2007 | 0% | £673pcm |
Sales History
The last recorded sale was on 19th December 2025 for £205,000 and since then the market in the area has increased by 4.3%.
William Street, Trethomas, Caerphilly, CF83 has had 3 sales since 1995, 3 of them in the last twelve months.
- Sold Dec 2025£205,000 | 3 Bed House26, William Street, Caerphilly, CF83 8DQ26, William Street, Caerphilly, CF83 8DQ
- Sold Nov 2025£255,000 | 3 Bed House53, William Street, Caerphilly, CF83 8FX53, William Street, Caerphilly, CF83 8FX
- Sold Oct 2025£154,000 | 3 Bed House6, William Street, Caerphilly, CF83 8DQ6, William Street, Caerphilly, CF83 8DQ
Top 3 Most Expensive Sales
- Sold Nov 2025£255,000 | 3 Bed House53, William Street, Caerphilly, CF83 8FX53, William Street, Caerphilly, CF83 8FX
- Sold Jun 2021£205,000 | 3 Bed House55, William Street, Caerphilly, CF83 8FX55, William Street, Caerphilly, CF83 8FX
- Sold Dec 2025£205,000 | 3 Bed House26, William Street, Caerphilly, CF83 8DQ26, William Street, Caerphilly, CF83 8DQ
Nearby Streets
William Street, Trethomas, Caerphilly, CF83 is the 1053rd largest and the 262nd most expensive street in the CF83 area.
- Redbrook Avenue, Trethomas, Caerphilly, CF8332 Addresses|63 m away
- Thomas Street, Trethomas, Caerphilly, CF8350 Addresses|77 m away
- Standard Street, Trethomas, Caerphilly, CF8348 Addresses|105 m away
- Lower Glyn Gwyn Street, Trethomas, Caerphilly, CF8320 Addresses|116 m away
- Mary Street, Trethomas, Caerphilly, CF8350 Addresses|129 m away
- James Street, Trethomas, Caerphilly, CF8350 Addresses|168 m away
Sections of this street
There are 2 postcodes on William Street, Trethomas, Caerphilly, CF83.
- House prices in CF83 8DQ42 Addresses
- House prices in CF83 8FX29 Addresses
Property Types
- 37 period houses built between 1800 and 1911
- 2 modern houses built after 1980
- 4 houses of an unknown age
- 28 other addresses of unknown type
- period house (37)
- modern house (2)
- house (4)
- Unknown (28)
Energy Efficiency
- Energy Performance Certificate (EPC) surveys have been conducted for 40 properties.
- The most common rating is D.
- A (0)
- E (7)
- B (0)
- F (0)
- C (9)
- G (0)
- D (24)
- No EPC (31)
Schools Nearby
Public Transport Nearby
The closest station to William Street, Trethomas, Caerphilly, CF83 is Caerphilly station, which is 3.5 kilometres away.
- Caerphilly|3.5 km away
- Energlyn & Churchill Park|3.5 km away
- Llanbradach|3.8 km away
