20, SULLIVAN CLOSE, PENARTH, CF64 3QR - £382,500

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.

20 SULLIVAN CLOSE is a very small extended detached house of 90m², built sometime between 1950 and 1966, which could now be worth an estimated £383,239. It was last sold for £382,500 in August 2025, which was around 26% below the average August 2025 detached price in the Vale of Glamorgan local authority area. The most recent EPC inspection was December 2021, where the current energy rating was C, and the potential energy rating was B.

20 SULLIVAN CLOSE Sold Prices

Land registry data shows three sales for 20 SULLIVAN CLOSE since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Vale of Glamorgan local authority area for the corresponding sale date. All of the three 20 SULLIVAN CLOSE 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 22 AUG	£382,500	£519,072	26% below HPI
2022 24 MAR	£300,000	£489,310	39% below HPI
1999 19 NOV	£21,013	£124,658	83% below HPI

20 SULLIVAN CLOSE Price Paid vs. HPI Average

The below graph shows the average detached house price in the Vale of Glamorgan local authority area over time, sourced from the HPI. The three 20 SULLIVAN CLOSE sales between November 1999 and August 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 March 2022 sale was for 39% below the HPI. So the extrapolation line tracks at 39% below the HPI over time, until the August 2025 sale, where it rises to 26% below the HPI. The line then continues to track at 26% below the HPI.

What might 20 SULLIVAN CLOSE be worth now?

20 SULLIVAN CLOSE might now be worth an estimated £383,239.

This is based on house price inflation of 0.2%, between August 2025 and May 2026, for detached houses, in the Vale of Glamorgan local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 0.2% inflationary increase is applied to the most recent sale price for 20 SULLIVAN CLOSE of £382,500 on 22nd August 2025. For the value to have increased from £382,500 to £383,239 over the one year and three months to May 2026, the following assumptions must hold true:

• The value of 20 SULLIVAN CLOSE has moved in line with the HPI for detached houses in the Vale of Glamorgan local authority area.
• The August 2025 sale price of £382,500 represented a fair market value for the property.
• The size, condition, and specification of 20 SULLIVAN CLOSE has not materially changed since August 2025.

How Large is 20 SULLIVAN CLOSE?

20 SULLIVAN CLOSE is 90m², which includes one extension, according to the EPC inspection conducted in December 2021. This puts it in the smallest 20% of detached houses houses in Penarth, based on EPC data. The below chart shows the distribution of detached houses houses by size in Penarth, and where 20 SULLIVAN CLOSE lies on this distribution: 13% of detached houses houses are smaller than 20 SULLIVAN CLOSE, and 87% of houses are larger. Note that EPC data is not available for all properties in Penarth.

20 SULLIVAN CLOSE: Plot and Title Map

20 SULLIVAN CLOSE sits on a plot of roughly 0.102 of an acre, or 412m². The below map shows the location of 20 SULLIVAN CLOSE, 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 20 SULLIVAN CLOSE). 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 20 SULLIVAN CLOSE?

20 SULLIVAN CLOSE is located in PENARTH, in the CF64 postcode district. The below map shows the position of No. 20 on SULLIVAN CLOSE.