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.
11 BRYN CASEG is a small semi-detached house of 85m², built sometime between 1991 and 1995, which could now be worth an estimated £243,989. It was last sold for £220,000 in November 2021, which was around 19% above the average November 2021 semi-detached price in the Gwynedd local authority area. The most recent EPC inspection was October 2011, where the current energy rating was C, and the potential energy rating was C.
Land registry data shows two sales for 11 BRYN CASEG since 1st January 1995. The below table shows the price paid for the two sales, along with the average semi-detached price in the Gwynedd local authority area for the corresponding sale date. Both of the two 11 BRYN CASEG 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 |
|---|---|---|---|
2021 23 NOV | £220,000 | £185,143 | 19% above HPI |
2012 16 JAN | £158,000 | £134,508 | 17% above HPI |
The below graph shows the average semi-detached house price in the Gwynedd local authority area over time, sourced from the HPI. The two 11 BRYN CASEG sales from January 2012 and November 2021 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 January 2012 sale was for 17% above the HPI. So the extrapolation line tracks at 17% above the HPI over time, until the November 2021 sale, where it rises to 19% above the HPI. The line then continues to track at 19% above the HPI.

11 BRYN CASEG might now be worth an estimated £243,989.
This is based on house price inflation of 10.9%, between November 2021 and April 2026, for semi-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 10.9% inflationary increase is applied to the most recent sale price for 11 BRYN CASEG of £220,000 on 23rd November 2021. For the value to have increased from £220,000 to £243,989 over the five years and seven months to April 2026, the following assumptions must hold true:
11 BRYN CASEG is 85m² according to the EPC inspection conducted in October 2011. This puts it in the smallest 30% of semi-detached houses houses in Bethesda, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Bethesda, and where 11 BRYN CASEG lies on this distribution: 21% of semi-detached houses houses are smaller than 11 BRYN CASEG, and 79% of houses are larger. Note that EPC data is not available for all properties in Bethesda.

11 BRYN CASEG sits on a plot of roughly 0.054 of an acre, or 219m². The below map shows the location of 11 BRYN CASEG, 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 11 BRYN CASEG). 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.

11 BRYN CASEG is located in GERLAN, in the LL57 postcode district. The below map shows the position of No. 11 on BRYN CASEG.

Most recent sales first: