ISFRYN, BLAENFFOS, BONCATH, SA37 0HY - £270,000

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.

ISFRYN is a very small detached house of 89m², built sometime between 1976 and 1982, which could now be worth an estimated £275,853. It was last sold for £270,000 in September 2025, which was around 14% below the average September 2025 detached price in the Pembrokeshire local authority area. The most recent EPC inspection was October 2024, where the current energy rating was E, and the potential energy rating was C.

ISFRYN Sold Prices

Land registry data shows two sales for ISFRYN since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Pembrokeshire local authority area for the corresponding sale date. Both of the two ISFRYN 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 5 SEP	£270,000	£314,821	14% below HPI
2007 22 AUG	£170,000	£237,644	28% below HPI

ISFRYN Price Paid vs. HPI Average

The below graph shows the average detached house price in the Pembrokeshire local authority area over time, sourced from the HPI. The two ISFRYN sales from August 2007 and September 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 August 2007 sale was for 28% below the HPI. So the extrapolation line tracks at 28% below the HPI over time, until the September 2025 sale, where it rises to 14% below the HPI. The line then continues to track at 14% below the HPI.

What might ISFRYN be worth now?

ISFRYN might now be worth an estimated £275,853.

This is based on house price inflation of 2.2%, between September 2025 and May 2026, for detached houses, in the Pembrokeshire local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 2.2% inflationary increase is applied to the most recent sale price for ISFRYN of £270,000 on 5th September 2025. For the value to have increased from £270,000 to £275,853 over the one year and four months to May 2026, the following assumptions must hold true:

• The value of ISFRYN has moved in line with the HPI for detached houses in the Pembrokeshire local authority area.
• The September 2025 sale price of £270,000 represented a fair market value for the property.
• The size, condition, and specification of ISFRYN has not materially changed since September 2025.

How Large is ISFRYN?

ISFRYN is 89m² according to the EPC inspection conducted in October 2024. This puts it in the smallest 10% of detached houses houses in Blaenffos, based on EPC data. The below chart shows the distribution of detached houses houses by size in Blaenffos, and where ISFRYN lies on this distribution: 7% of detached houses houses are smaller than ISFRYN, and 93% of houses are larger. Note that EPC data is not available for all properties in Blaenffos.

ISFRYN: Plot and Title Map

ISFRYN sits on a plot of roughly 0.153 of an acre, or 620m². The below map shows the location of ISFRYN, 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 ISFRYN). 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 ISFRYN?

ISFRYN is located in BLAENFFOS, in the SA37 postcode district. The below map shows the position of ISFRYN in BLAENFFOS.