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.
MONA is a small extended detached house of 94m², built sometime between 1900 and 1929, which could now be worth an estimated £671,293. It was last sold for £590,000 in January 2021, which was around 123% above the average January 2021 detached price in the Gwynedd local authority area. The most recent EPC inspection was November 2019, where the current energy rating was G, and the potential energy rating was C.
Land registry data shows two sales for MONA since 1st 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 MONA 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 21 JAN | £590,000 | £265,029 | ![]() 123% above HPI |
2004 7 SEP | £235,000 | £178,741 | ![]() 31% above HPI |
The below graph shows the average detached house price in the Gwynedd local authority area over time, sourced from the HPI. The two MONA sales from September 2004 and January 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 September 2004 sale was for 31% above the HPI. So the extrapolation line tracks at 31% above the HPI over time, until the January 2021 sale, where it rises to 123% above the HPI. The line then continues to track at 123% above the HPI.
MONA might now be worth an estimated £671,293.
This is based on house price inflation of 13.8%, between January 2021 and February 2025, 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 13.8% inflationary increase is applied to the most recent sale price for MONA of £590,000 on 21st January 2021. For the value to have increased from £590,000 to £671,293 over the three years and eleven months to February 2025, the following assumptions must hold true:
MONA is 94m², which includes two extensions, according to the EPC inspection conducted in November 2019. This puts it in the smallest 30% of detached houses houses in Abersoch, based on EPC data. The below chart shows the distribution of detached houses houses by size in Abersoch, and where MONA lies on this distribution: 24% of detached houses houses are smaller than MONA, and 75% of houses are larger. Note that EPC data is not available for all properties in Abersoch.
MONA sits on a plot of roughly 0.061 of an acre, or 247m². The below map shows the location of MONA, 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 MONA). 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.
MONA is located in ABERSOCH, in the LL53 postcode district. The below map shows the position of MONA in ABERSOCH.