18, LON GWESYN, BIRCHGROVE, SWANSEA, SA7 9LD - £100,000

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

18 LON GWESYN is a small semi-detached house of 86m², built sometime between 1950 and 1966, which could now be worth an estimated £158,902. It was last sold for £100,000 in September 2006, which was around 23% below the average September 2006 semi-detached price in the Swansea local authority area. The most recent EPC inspection was December 2024, where the current energy rating was C, and the potential energy rating was B.

18 LON GWESYN Sold Prices

Land registry data shows two sales for 18 LON GWESYN 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 Swansea local authority area for the corresponding sale date. Both of the two 18 LON GWESYN 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
2006 29 SEP	£100,000	£129,963	23% below HPI
1997 15 AUG	£31,000	£45,910	32% below HPI

18 LON GWESYN Price Paid vs. HPI Average

The below graph shows the average semi-detached house price in the Swansea local authority area over time, sourced from the HPI. The two 18 LON GWESYN sales from August 1997 and September 2006 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 August 1997 sale was for 32% below the HPI. So the extrapolation line tracks at 32% below the HPI over time, until the September 2006 sale, where it rises to 23% below the HPI. The line then continues to track at 23% below the HPI.

What might 18 LON GWESYN be worth now?

18 LON GWESYN might now be worth an estimated £158,902.

This is based on house price inflation of 58.9%, between September 2006 and December 2024, for semi-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 58.9% inflationary increase is applied to the most recent sale price for 18 LON GWESYN of £100,000 on 29th September 2006. For the value to have increased from £100,000 to £158,902 over the seventeen years and nine months to December 2024, the following assumptions must hold true:

• The value of 18 LON GWESYN has moved in line with the HPI for semi-detached houses in the Swansea local authority area.
• The September 2006 sale price of £100,000 represented a fair market value for the property.
• The size, condition, and specification of 18 LON GWESYN has not materially changed since September 2006.

How Large is 18 LON GWESYN?

18 LON GWESYN is 86m² according to the EPC inspection conducted in December 2024. This puts it in the smallest 30% of semi-detached houses houses in Swansea, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Swansea, and where 18 LON GWESYN lies on this distribution: 21% of semi-detached houses houses are smaller than 18 LON GWESYN, and 78% of houses are larger. Note that EPC data is not available for all properties in Swansea.

18 LON GWESYN: Plot and Title Map

18 LON GWESYN sits on a plot of roughly 0.053 of an acre, or 216m². The below map shows the location of 18 LON GWESYN, 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 18 LON GWESYN). 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 18 LON GWESYN?

18 LON GWESYN is located in BIRCHGROVE, in the SA7 postcode district. The below map shows the position of No. 18 on LON GWESYN.