9, SOUTHERNDOWN AVENUE, MAYALS, SWANSEA, SA3 5EL - £249,000

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

9 SOUTHERNDOWN AVENUE is a very large extended detached house of 238m², built sometime between 1991 and 1995. It was last sold for £249,000 in October 1999, which was around 193% above the average October 1999 detached price in the Swansea local authority area. The most recent EPC inspection was May 2013, where the current energy rating was D, and the potential energy rating was C.

9 SOUTHERNDOWN AVENUE Sold Prices

Land registry data shows two sales for 9 SOUTHERNDOWN AVENUE since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Swansea local authority area for the corresponding sale date. Both of the two 9 SOUTHERNDOWN AVENUE 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
1999 6 OCT	£249,000	£85,088	193% above HPI
1997 21 NOV	£180,000	£78,551	129% above HPI

9 SOUTHERNDOWN AVENUE 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 two 9 SOUTHERNDOWN AVENUE sales from November 1997 and October 1999 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 November 1997 sale was for 129% above the HPI. So the extrapolation line tracks at 129% above the HPI over time, until the October 1999 sale, where it rises to 193% above the HPI. The line then continues to track at 193% above the HPI.

What might 9 SOUTHERNDOWN AVENUE be worth now?

9 SOUTHERNDOWN AVENUE might now be worth an estimated £937,891.

This is based on house price inflation of 276.7%, between October 1999 and December 2024, 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 276.7% inflationary increase is applied to the most recent sale price for 9 SOUTHERNDOWN AVENUE of £249,000 on 6th October 1999. For the value to have increased from £249,000 to £937,891 over the 24 years and ten months to December 2024, the following assumptions must hold true:

• The value of 9 SOUTHERNDOWN AVENUE has moved in line with the HPI for detached houses in the Swansea local authority area.
• The October 1999 sale price of £249,000 represented a fair market value for the property.
• The size, condition, and specification of 9 SOUTHERNDOWN AVENUE has not materially changed since October 1999.

How Large is 9 SOUTHERNDOWN AVENUE?

9 SOUTHERNDOWN AVENUE is 238m², which includes three extensions, according to the EPC inspection conducted in May 2013. This puts it in the largest 10% of detached houses houses in Swansea, based on EPC data. The below chart shows the distribution of detached houses houses by size in Swansea, and where 9 SOUTHERNDOWN AVENUE lies on this distribution: 95% of detached houses houses are smaller than 9 SOUTHERNDOWN AVENUE, and 5% of houses are larger. Note that EPC data is not available for all properties in Swansea.

9 SOUTHERNDOWN AVENUE: Plot and Title Map

9 SOUTHERNDOWN AVENUE sits on a plot of roughly 0.170 of an acre, or 688m². The below map shows the location of 9 SOUTHERNDOWN AVENUE, 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 9 SOUTHERNDOWN AVENUE). 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 9 SOUTHERNDOWN AVENUE?

9 SOUTHERNDOWN AVENUE is located in MAYALS, in the SA3 postcode district. The below map shows the position of No. 9 on SOUTHERNDOWN AVENUE.