20, TREM Y DYFFRYN, MOUNTAIN ASH, CF45 4AQ - £260,000

The information on this page is based on a number of underlying datasets, most of which are updated monthly. We maintain an update schedule which explains which version of each dataset we are currently relying on.

20 TREM Y DYFFRYN is a very large detached house of 187m², built sometime from 2007 onwards, which could now be worth an estimated £354,194. It was last sold for £260,000 in October 2019, which was around 33% above the average October 2019 detached price in the Rhondda Cynon Taf local authority area. The most recent EPC inspection was August 2019, where the current energy rating was C, and the potential energy rating was C.

20 TREM Y DYFFRYN Sold Prices

Land registry data shows two sales for 20 TREM Y DYFFRYN since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Rhondda Cynon Taf local authority area for the corresponding sale date. Both of the two 20 TREM Y DYFFRYN sales were for above 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
2019 18 OCT	£260,000	£196,106	33% above HPI
2007 11 APR	£209,950	£160,264	31% above HPI

20 TREM Y DYFFRYN 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 two 20 TREM Y DYFFRYN sales from April 2007 and October 2019 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 April 2007 sale was for 31% above the HPI. So the extrapolation line tracks at 31% above the HPI over time, until the October 2019 sale, where it rises to 33% above the HPI. The line then continues to track at 33% above the HPI.

What might 20 TREM Y DYFFRYN be worth now?

20 TREM Y DYFFRYN might now be worth an estimated £354,194.

This is based on house price inflation of 36.2%, between October 2019 and February 2025, for detached houses, in the Rhondda Cynon Taf local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 36.2% inflationary increase is applied to the most recent sale price for 20 TREM Y DYFFRYN of £260,000 on 18th October 2019. For the value to have increased from £260,000 to £354,194 over the six years and eight months to February 2025, the following assumptions must hold true:

• The value of 20 TREM Y DYFFRYN has moved in line with the HPI for detached houses in the Rhondda Cynon Taf local authority area.
• The October 2019 sale price of £260,000 represented a fair market value for the property.
• The size, condition, and specification of 20 TREM Y DYFFRYN has not materially changed since October 2019.

How Large is 20 TREM Y DYFFRYN?

20 TREM Y DYFFRYN is 187m² according to the EPC inspection conducted in August 2019. This puts it in the largest 10% of detached houses houses in Mountain Ash, based on EPC data. The below chart shows the distribution of detached houses houses by size in Mountain Ash, and where 20 TREM Y DYFFRYN lies on this distribution: 93% of detached houses houses are smaller than 20 TREM Y DYFFRYN, and 7% of houses are larger. Note that EPC data is not available for all properties in Mountain Ash.

20 TREM Y DYFFRYN: Plot and Title Map

20 TREM Y DYFFRYN sits on a plot of roughly 0.066 of an acre, or 268m². The below map shows the location of 20 TREM Y DYFFRYN, 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 TREM Y DYFFRYN). 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 TREM Y DYFFRYN?

20 TREM Y DYFFRYN is located in MOUNTAIN ASH, in the CF45 postcode district. The below map shows the position of No. 20 on TREM Y DYFFRYN.