40, BRON Y DERI, MOUNTAIN ASH, CF45 4LL - £220,000

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.

40 BRON Y DERI is a very small semi-detached house of 73m², built sometime between 1983 and 1990. It was last sold for £220,000 in July 2026, which was around 23% above the average July 2026 semi-detached price in the Rhondda Cynon Taf local authority area. The most recent EPC inspection was April 2026, where the current energy rating was C, and the potential energy rating was C.

40 BRON Y DERI Sold Prices

Land registry data shows two sales for 40 BRON Y DERI since 1^st January 1995. The below table shows the price paid for the two sales, along with the average semi-detached price in the Rhondda Cynon Taf local authority area for the corresponding sale date. Both of the two 40 BRON Y DERI 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
2026 6 JUL	£220,000	£178,914	23% above HPI
2002 11 FEB	£57,000	£38,763	47% above HPI

40 BRON Y DERI Price Paid vs. HPI Average

The below graph shows the average semi-detached house price in the Rhondda Cynon Taf local authority area over time, sourced from the HPI. The two 40 BRON Y DERI sales from February 2002 and July 2026 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 February 2002 sale was for 47% above the HPI. So the extrapolation line tracks at 47% above the HPI over time, until the July 2026 sale, where it falls to 23% above the HPI. The line then continues to track at 23% above the HPI.

How Large is 40 BRON Y DERI?

40 BRON Y DERI is 73m² according to the EPC inspection conducted in April 2026. This puts it in the smallest 10% of semi-detached houses houses in Mountain Ash, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Mountain Ash, and where 40 BRON Y DERI lies on this distribution: 7% of semi-detached houses houses are smaller than 40 BRON Y DERI, and 92% of houses are larger. Note that EPC data is not available for all properties in Mountain Ash.

40 BRON Y DERI: Plot and Title Map

40 BRON Y DERI sits on a plot of roughly 0.061 of an acre, or 247m². The below map shows the location of 40 BRON Y DERI, 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 40 BRON Y DERI). 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 40 BRON Y DERI?

40 BRON Y DERI is located in MOUNTAIN ASH, in the CF45 postcode district. The below map shows the position of No. 40 on BRON Y DERI.