BWTHYN DIDDOS, LLANFAIR, HARLECH, LL46 2SA - £350,000

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.

BWTHYN DIDDOS is a midsized extended detached house of 103m², built sometime before 1900, which could now be worth an estimated £348,611. It was last sold for £350,000 in November 2025, which was around 13% above the average November 2025 detached price in the Gwynedd local authority area. The most recent EPC inspection was April 2024, where the current energy rating was E, and the potential energy rating was C.

BWTHYN DIDDOS Sold Prices

Land registry data shows two sales for BWTHYN DIDDOS since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Gwynedd local authority area for the corresponding sale date. Both of the two BWTHYN DIDDOS 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
2025 6 NOV	£350,000	£308,717	13% above HPI
2002 25 SEP	£140,000	£103,926	35% above HPI

BWTHYN DIDDOS Price Paid vs. HPI Average

The below graph shows the average detached house price in the Gwynedd local authority area over time, sourced from the HPI. The two BWTHYN DIDDOS sales from September 2002 and November 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 September 2002 sale was for 35% above the HPI. So the extrapolation line tracks at 35% above the HPI over time, until the November 2025 sale, where it falls to 13% above the HPI. The line then continues to track at 13% above the HPI.

What might BWTHYN DIDDOS be worth now?

BWTHYN DIDDOS might now be worth an estimated £348,611.

This is based on house price deflation of 0.4%, between November 2025 and April 2026, for detached houses, in the Gwynedd local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 0.4% deflationary decrease is applied to the most recent sale price for BWTHYN DIDDOS of £350,000 on 6th November 2025. For the value to have decreased from £350,000 to £348,611 over the one year and seven months to April 2026, the following assumptions must hold true:

• The value of BWTHYN DIDDOS has moved in line with the HPI for detached houses in the Gwynedd local authority area.
• The November 2025 sale price of £350,000 represented a fair market value for the property.
• The size, condition, and specification of BWTHYN DIDDOS has not materially changed since November 2025.

How Large is BWTHYN DIDDOS?

BWTHYN DIDDOS is 103m², which includes one extension, according to the EPC inspection conducted in April 2024. This puts it in the smallest 50% of detached houses houses in Llanfair, based on EPC data. The below chart shows the distribution of detached houses houses by size in Llanfair, and where BWTHYN DIDDOS lies on this distribution: 47% of detached houses houses are smaller than BWTHYN DIDDOS, and 51% of houses are larger. Note that EPC data is not available for all properties in Llanfair.

BWTHYN DIDDOS: Plot and Title Map

BWTHYN DIDDOS sits on a plot of roughly 0.319 of an acre, or 1,291m². The below map shows the location of BWTHYN DIDDOS, 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 BWTHYN DIDDOS). 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 BWTHYN DIDDOS?

BWTHYN DIDDOS is located in LLANFAIR, in the LL46 postcode district. The below map shows the position of BWTHYN DIDDOS in LLANFAIR.