31, CLOS THOMAS, OLD ST MELLONS, CARDIFF, CF3 6YR - £348,000

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.

31 CLOS THOMAS is a very small detached house of 90m², which could now be worth an estimated £351,015. It was last sold for £348,000 in February 2025, which was around 32% below the average February 2025 detached price in the Cardiff local authority area. The most recent EPC inspection was November 2020, where the current energy rating was B, and the potential energy rating was A.

31 CLOS THOMAS Sold Prices

Land registry data shows two sales for 31 CLOS THOMAS since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Cardiff local authority area for the corresponding sale date. Both of the two 31 CLOS THOMAS 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
2025 28 FEB	£348,000	£512,867	32% below HPI
2020 17 DEC	£286,995	£423,255	32% below HPI

31 CLOS THOMAS Price Paid vs. HPI Average

The below graph shows the average detached house price in the Cardiff local authority area over time, sourced from the HPI. The two 31 CLOS THOMAS sales from December 2020 and February 2025 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 2020 sale was for 32% below the HPI. So the extrapolation line tracks at 32% below the HPI over time, until the February 2025 sale, which was also at 32% below the HPI.

What might 31 CLOS THOMAS be worth now?

31 CLOS THOMAS might now be worth an estimated £351,015.

This is based on house price inflation of 0.9%, between February 2025 and June 2025, for detached houses, in the Cardiff local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 0.9% inflationary increase is applied to the most recent sale price for 31 CLOS THOMAS of £348,000 on 28th February 2025. For the value to have increased from £348,000 to £351,015 over the eight months to June 2025, the following assumptions must hold true:

• The value of 31 CLOS THOMAS has moved in line with the HPI for detached houses in the Cardiff local authority area.
• The February 2025 sale price of £348,000 represented a fair market value for the property.
• The size, condition, and specification of 31 CLOS THOMAS has not materially changed since February 2025.

How Large is 31 CLOS THOMAS?

31 CLOS THOMAS is 90m² according to the EPC inspection conducted in November 2020. This puts it in the smallest 20% of detached houses houses in Cardiff, based on EPC data. The below chart shows the distribution of detached houses houses by size in Cardiff, and where 31 CLOS THOMAS lies on this distribution: 16% of detached houses houses are smaller than 31 CLOS THOMAS, and 83% of houses are larger. Note that EPC data is not available for all properties in Cardiff.

31 CLOS THOMAS: Plot and Title Map

31 CLOS THOMAS sits on a plot of roughly 0.061 of an acre, or 245m². The below map shows the location of 31 CLOS THOMAS, 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 31 CLOS THOMAS). 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 31 CLOS THOMAS?

31 CLOS THOMAS is located in OLD ST MELLONS, in the CF3 postcode district. The below map shows the position of No. 31 on CLOS THOMAS.