DERLWYN, PENYBRYN ROAD, MOUNTAIN ASH, CF45 3SJ - £76,975

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

DERLWYN is a large extended detached house of 148m², built sometime between 1900 and 1929, which could now be worth an estimated £111,444. It was last sold for £76,975 in March 2019, which was around 58% below the average March 2019 detached price in the Rhondda Cynon Taf local authority area. The most recent EPC inspection was December 2019, where the current energy rating was D, and the potential energy rating was C.

DERLWYN Sold Prices

Land registry data shows three sales for DERLWYN 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 DERLWYN 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
2019 11 MAR	£76,975	£184,524	58% below HPI
1999 1 APR	£60,000	£61,451	2% below HPI
1996 7 FEB	£49,950	£56,481	12% below HPI

DERLWYN 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 DERLWYN sales between February 1996 and March 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 1999 sale was for 2% below the HPI. So the extrapolation line tracks at 2% below the HPI over time, until the March 2019 sale, where it falls to 58% below the HPI. The line then continues to track at 58% below the HPI.

What might DERLWYN be worth now?

DERLWYN might now be worth an estimated £111,444.

This is based on house price inflation of 44.8%, between March 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 44.8% inflationary increase is applied to the most recent sale price for DERLWYN of £76,975 on 11th March 2019. For the value to have increased from £76,975 to £111,444 over the six years and one month to February 2025, the following assumptions must hold true:

• The value of DERLWYN has moved in line with the HPI for detached houses in the Rhondda Cynon Taf local authority area.
• The March 2019 sale price of £76,975 represented a fair market value for the property.
• The size, condition, and specification of DERLWYN has not materially changed since March 2019.

How Large is DERLWYN?

DERLWYN is 148m², which includes two extensions, according to the EPC inspection conducted in December 2019. This puts it in the largest 30% 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 DERLWYN lies on this distribution: 80% of detached houses houses are smaller than DERLWYN, and 20% of houses are larger. Note that EPC data is not available for all properties in Mountain Ash.

DERLWYN: Plot and Title Map

DERLWYN sits on a plot of roughly 0.192 of an acre, or 776m². The below map shows the location of DERLWYN, 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 DERLWYN). 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 DERLWYN?

DERLWYN is located on PENYBRYN ROAD in MOUNTAIN ASH, in the CF45 postcode district. The below map shows the position of DERLWYN on PENYBRYN ROAD.