20, WILLIAM STREET, YSTRAD, PENTRE, CF41 7QR - £146,000

Based on the January 2025 Price Paid Data (released on 3rd March 2025), the December 2024 House Price Index (released on 19th February 2025), and the January 2025 Energy Performance of Buildings Data (released on 27th February 2025). Sources

20 WILLIAM STREET is a midsized extended detached house of 124m², built sometime between 1900 and 1929. It was last sold for £146,000 in October 2024, which was around 45% below the average October 2024 detached price in the Rhondda Cynon Taf local authority area. The most recent EPC inspection was July 2018, where the current energy rating was E, and the potential energy rating was C.

20 WILLIAM STREET Sold Prices

Land registry data shows three sales for 20 WILLIAM STREET since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Rhondda Cynon Taf local authority area for the corresponding sale date. All of the three 20 WILLIAM STREET sales were for below the average price. The average price is sourced from the Office for National Statistics' House Price Index (HPI).

Date	Price	HPI Price	Variation from HPI
2024 25 OCT	£146,000	£266,704	45% below HPI
2022 13 DEC	£89,950	£275,729	67% below HPI
2002 3 OCT	£36,000	£82,511	56% below HPI

20 WILLIAM STREET Price Paid vs. HPI Average

The below graph shows the average detached house price in the Rhondda Cynon Taf local authority area over time, sourced from the HPI. The three 20 WILLIAM STREET sales between October 2002 and October 2024 have been plotted on the graph. A line has been extrapolated to show what the value of the property might have been over time, following each sale, had it maintained the same margin above or below the HPI (as a percentage). For example, the December 2022 sale was for 67% below the HPI. So the extrapolation line tracks at 67% below the HPI over time, until the October 2024 sale, where it rises to 45% below the HPI. The line then continues to track at 45% below the HPI.

How Large is 20 WILLIAM STREET?

20 WILLIAM STREET is 124m², which includes one extension, according to the EPC inspection conducted in July 2018. This puts it in the largest 50% of detached houses houses in Rhondda, based on EPC data. The below chart shows the distribution of detached houses houses by size in Rhondda, and where 20 WILLIAM STREET lies on this distribution: 48% of detached houses houses are smaller than 20 WILLIAM STREET, and 50% of houses are larger. Note that EPC data is not available for all properties in Rhondda.

20 WILLIAM STREET: Plot and Title Map

20 WILLIAM STREET sits on a plot of roughly 0.061 of an acre, or 246m². The below map shows the location of 20 WILLIAM STREET, an approximate outline of the building(s), and the indicative extent of the property. The plot extent is a Land Registry INSPIRE Index Polygon, and it is important to note that a title may include more than one polygon, whereas only one polygon is shown on the map (the polygon which intersects with the position of 20 WILLIAM STREET). The full extent of the land contained in any registered title can only be identified from the individual title plan. The maps on this page should not be relied upon to establish the extent of a title.

Where is 20 WILLIAM STREET?

20 WILLIAM STREET is located in YSTRAD, in the CF41 postcode district. The below map shows the position of No. 20 on WILLIAM STREET.