21, TWYNIAGO, PONTARDDULAIS, SWANSEA, SA4 8HX - £91,000

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

21 TWYNIAGO is a very small extended detached house of 76m², built sometime between 1950 and 1966, which could now be worth an estimated £125,988. It was last sold for £91,000 in December 2017, which was around 60% below the average December 2017 detached price in the Swansea local authority area. The most recent EPC inspection was May 2012, where the current energy rating was E, and the potential energy rating was B.

21 TWYNIAGO Sold Prices

Land registry data shows three sales for 21 TWYNIAGO since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Swansea local authority area for the corresponding sale date. All of the three 21 TWYNIAGO 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
2017 15 DEC	£91,000	£227,835	60% below HPI
2013 20 DEC	£119,950	£200,432	40% below HPI
2002 26 SEP	£63,500	£108,982	42% below HPI

21 TWYNIAGO Price Paid vs. HPI Average

The below graph shows the average detached house price in the Swansea local authority area over time, sourced from the HPI. The three 21 TWYNIAGO sales between September 2002 and December 2017 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 2013 sale was for 40% below the HPI. So the extrapolation line tracks at 40% below the HPI over time, until the December 2017 sale, where it falls to 60% below the HPI. The line then continues to track at 60% below the HPI.

What might 21 TWYNIAGO be worth now?

21 TWYNIAGO might now be worth an estimated £125,988.

This is based on house price inflation of 38.4%, between December 2017 and February 2025, for detached houses, in the Swansea local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 38.4% inflationary increase is applied to the most recent sale price for 21 TWYNIAGO of £91,000 on 15th December 2017. For the value to have increased from £91,000 to £125,988 over the eight years and ten months to February 2025, the following assumptions must hold true:

• The value of 21 TWYNIAGO has moved in line with the HPI for detached houses in the Swansea local authority area.
• The December 2017 sale price of £91,000 represented a fair market value for the property.
• The size, condition, and specification of 21 TWYNIAGO has not materially changed since December 2017.

How Large is 21 TWYNIAGO?

21 TWYNIAGO is 76m², which includes one extension, according to the EPC inspection conducted in May 2012. This puts it in the smallest 10% of detached houses houses in Pontarddulais, based on EPC data. The below chart shows the distribution of detached houses houses by size in Pontarddulais, and where 21 TWYNIAGO lies on this distribution: 9% of detached houses houses are smaller than 21 TWYNIAGO, and 91% of houses are larger. Note that EPC data is not available for all properties in Pontarddulais.

21 TWYNIAGO: Plot and Title Map

21 TWYNIAGO sits on a plot of roughly 0.123 of an acre, or 498m². The below map shows the location of 21 TWYNIAGO, 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 21 TWYNIAGO). 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 21 TWYNIAGO?

21 TWYNIAGO is located in PONTARDDULAIS, in the SA4 postcode district. The below map shows the position of No. 21 on TWYNIAGO.