House prices on William Street
Median value — July 2026
£173,468
Modelled from 67 properties Stede tracks in William Street
Market snapshot
£173,468
Median value
£175,016
Average value
5
Sales in the last 12 months
+4%
Change over the past year
Value over time
- Modelled value
Modelled month by month from the UK House Price Index, averaged across every property type Stede tracks here.
View as a table
| Year | Modelled value |
|---|---|
| 2000 | £55,851 |
| 2001 | £58,800 |
| 2002 | £73,969 |
| 2003 | £95,188 |
| 2004 | £122,267 |
| 2005 | £133,633 |
| 2006 | £139,971 |
| 2007 | £146,530 |
| 2008 | £131,202 |
| 2009 | £128,947 |
| 2010 | £125,273 |
| 2011 | £132,282 |
| 2012 | £126,871 |
| 2013 | £128,863 |
| 2014 | £138,593 |
| 2015 | £141,322 |
| 2016 | £143,194 |
| 2017 | £153,899 |
| 2018 | £166,048 |
| 2019 | £169,037 |
| 2020 | £182,081 |
| 2021 | £204,726 |
| 2022 | £230,373 |
| 2023 | £227,315 |
| 2024 | £237,960 |
| 2025 | £240,282 |
| 2026 | £247,378 |
There aren't enough recorded sales on William Street alone to model a trend for it, so this line shows Caerphilly instead.
Property types
- Mid-terrace house87%£172,369
- Detached house7%£259,263
- Semi-detached house4%£228,813
- Property1%£27,414
Recent sales
- 8 William Street, Abertridwr, Caerphilly, CF83 4DJ£134,000 · 2026£134,000
- 52 William Street, Trethomas, Caerphilly, CF83 8FX£210,000 · 2026£209,000
- 4 William Street, Trethomas, Caerphilly, CF83 8DQ£132,000 · 2026£136,000
- 26 William Street, Trethomas, Caerphilly, CF83 8DQ£205,000 · 2025£211,000
- 53 William Street, Trethomas, Caerphilly, CF83 8FX£255,000 · 2025£264,000
- 6 William Street, Trethomas, Caerphilly, CF83 8DQ£154,000 · 2025£160,000
- 7 William Street, Trethomas, Caerphilly, CF83 8DQ£140,000 · 2025£146,000
- 84 William Street, Trethomas, Caerphilly, CF83 8FX£175,000 · 2025£182,000
Addresses in William Street
- 1 William Street, Trethomas, Caerphilly, CF83 8DQ£75,000 · 2013£150,000
- 10 William Street, Abertridwr, Caerphilly, CF83 4DJ£122,000 · 2024£136,000
- 11 William Street, Abertridwr, Caerphilly, CF83 4DJ£82,000 · 2004£169,000
- 11A, William Street, Abertridwr, Caerphilly, CF83 4DJ£136,000 · 2020£199,000
- 11B, William Street, Abertridwr, Caerphilly, CF83 4DJ£91,000 · 2004£209,000
- 11C, William Street, Abertridwr, Caerphilly, CF83 4DJ£92,000 · 2004£229,000
- 11D, William Street, Abertridwr, Caerphilly, CF83 4DJ£135,000 · 2025£148,000
- 12 William Street, Trethomas, Caerphilly, Rhymney Valley, Mid Glamorgan, CF83 8DQ£32,000 · 1996£191,000
- 13 William Street, Trethomas, Caerphilly, CF83 8DQ£160,000 · 2024£169,000
- 16 William Street, Trethomas, Caerphilly, CF83 8DQ£79,000 · 2011£153,000
- 17 William Street, Trethomas, Caerphilly, CF83 8DQ£175,000 · 2024£195,000
- 18 William Street, Abertridwr, Caerphilly, CF83 4DJ£87,000 · 2006£149,000
- 19 William Street, Trethomas, Caerphilly, CF83 8DQ£37,950 · 1999£195,000
- 2 William Street, Trethomas, Caerphilly, CF83 8DQ£122,000 · 2019£188,000
- 20 William Street, Abertridwr, Caerphilly, CF83 4DJ£84,000 · 2008£158,000
- 20 William Street, Trethomas, Caerphilly, CF83 8DQ£73,000 · 2017£126,000
- 21 William Street, Trethomas, Caerphilly, CF83 8DQ£41,000 · 2001£182,000
- 22 William Street, Trethomas, Caerphilly, CF83 8DQ£24,000 · 2008£41,000
- 23 William Street, Trethomas, Caerphilly, CF83 8DQ£95,000 · 2011£184,000
- 24 William Street, Abertridwr, Caerphilly, CF83 4DJ£100,000 · 2016£169,000
- 25 William Street, Trethomas, Caerphilly, CF83 8DQ£108,000 · 2015£192,000
- 26 William Street, Abertridwr, Caerphilly, CF83 4DJ£87,606 · 2013£165,000
- 26 William Street, Trethomas, Caerphilly, CF83 8DQ£205,000 · 2025£211,000
- 28 William Street, Abertridwr, Caerphilly, CF83 4DJ£140,000 · 2022£153,000
- 29 William Street, Trethomas, Caerphilly, CF83 8DQ£100,000 · 2015£174,000
- 30 William Street, Abertridwr, Caerphilly, CF83 4DJ£40,000 · 2004£101,000
- 31 William Street, Trethomas, Caerphilly, CF83 8DQ£120,000 · 2007£200,000
- 32 William Street, Trethomas, Caerphilly, CF83 8DQ£59,950 · 1997£316,000
- 33 William Street, Trethomas, Caerphilly, CF83 8DQ£85,000 · 2003£258,000
- 34 William Street, Abertridwr, Caerphilly, CF83 4DJ£150,000 · 2021£200,000
- 35 William Street, Trethomas, Caerphilly, CF83 8DQ£155,000 · 2022£179,000
- 36 William Street, Abertridwr, Caerphilly, CF83 4DJ£61,700 · 2003£199,000
- 37 William Street, Trethomas, Caerphilly, CF83 8DQ£115,000 · 2020£160,000
- 38 William Street, Abertridwr, Caerphilly, CF83 4DJ£84,000 · 2004£189,000
- 39 William Street, Trethomas, Caerphilly, CF83 8DQ£26,000 · 1997£143,000
- 4 William Street, Abertridwr, Caerphilly, CF83 4DJ£122,000 · 2004£249,000
- 4 William Street, Trethomas, Caerphilly, CF83 8DQ£132,000 · 2026£136,000
- 41 William Street, Trethomas, Caerphilly, CF83 8DQ£157,000 · 2024£168,000
- 43 William Street, Trethomas, Caerphilly, CF83 8DQ£41,500 · 2000£207,000
- 47 William Street, Trethomas, Caerphilly, CF83 8DQ£23,000 · 1998£115,000
- 49 William Street, Trethomas, Caerphilly, CF83 8DQ£153,000 · 2023£167,000
- 5 William Street, Trethomas, Caerphilly, CF83 8DQ£42,500 · 2001£197,000
- 51 William Street, Trethomas, Caerphilly, CF83 8FX£177,000 · 2007£315,000
- 52 William Street, Trethomas, Caerphilly, CF83 8FX£210,000 · 2026£209,000
- 53 William Street, Trethomas, Caerphilly, CF83 8FX£255,000 · 2025£264,000
- 55 William Street, Trethomas, Caerphilly, CF83 8FX£205,000 · 2021£259,000
- 56 William Street, Trethomas, Caerphilly, CF83 8FX£162,000 · 2025£169,000
- 58 William Street, Trethomas, Caerphilly, CF83 8FX£108,000 · 2008£190,000
- 6 William Street, Trethomas, Caerphilly, CF83 8DQ£154,000 · 2025£160,000
- 60 William Street, Trethomas, Caerphilly, CF83 8FX£103,000 · 2017£167,000
About this area
William Street, in Caerphilly, is a street. Stede can model 67 properties there, from HM Land Registry Price Paid Data and the UK House Price Index.
As of July 2026, William Street has a median estimated value of £173,468 and an average of £175,016.
Modelled values in William Street are +4% over the past year and +25% over five years.
The market here is mostly mid-terrace houses, which make up 87% of the properties Stede tracks in William Street.
5 sales were recorded in William Street over the past 12 months.
Common questions
What is the average house price in William Street?
As of July 2026, the average estimated value is £175,016 and the median is £173,468 across 67 properties Stede tracks in William Street. This is not a formal market valuation.
Are house prices in William Street going up or down?
Modelled values in William Street are +4% over the past year and +25% over five years, based on the UK House Price Index.
What types of property are in William Street?
87% of the properties Stede tracks in William Street are mid-terrace houses. detached houses are next most common, at 7%.
How many properties are in William Street?
Stede can model 67 properties in William Street, with 5 recorded sales in the past 12 months.
How does Stede calculate house prices for William Street?
These figures are modelled from HM Land Registry Price Paid Data and the UK House Price Index — the same sources used for every individual property valuation on Stede. Full detail is on the methodology page.
How we calculate this
These figures are modelled from HM Land Registry Price Paid Data and the UK House Price Index — the same sources behind every individual property valuation on Stede.
Read the full methodology and data sources →