RHOSWEN, LLANRUG, CAERNARFON, LL55 4AN - £405,000

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.

RHOSWEN is a large detached house of 152m², built sometime between 1983 and 1990, which could now be worth an estimated £422,232. It was last sold for £405,000 in August 2025, which was around 34% above the average August 2025 detached price in the Gwynedd local authority area. The most recent EPC inspection was September 2023, where the current energy rating was E, and the potential energy rating was D.

RHOSWEN Sold Prices

Land registry data shows three sales for RHOSWEN since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Gwynedd local authority area for the corresponding sale date. All of the three RHOSWEN 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 14 AUG	£405,000	£302,861	34% above HPI
2012 10 MAY	£230,000	£191,722	20% above HPI
2011 27 OCT	£240,000	£202,571	18% above HPI

RHOSWEN 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 three RHOSWEN sales between October 2011 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 May 2012 sale was for 20% above the HPI. So the extrapolation line tracks at 20% above the HPI over time, until the August 2025 sale, where it rises to 34% above the HPI. The line then continues to track at 34% above the HPI.

What might RHOSWEN be worth now?

RHOSWEN might now be worth an estimated £422,232.

This is based on house price inflation of 4.3%, between August 2025 and May 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 4.3% inflationary increase is applied to the most recent sale price for RHOSWEN of £405,000 on 14th August 2025. For the value to have increased from £405,000 to £422,232 over the one year and three months to May 2026, the following assumptions must hold true:

• The value of RHOSWEN has moved in line with the HPI for detached houses in the Gwynedd local authority area.
• The August 2025 sale price of £405,000 represented a fair market value for the property.
• The size, condition, and specification of RHOSWEN has not materially changed since August 2025.

How Large is RHOSWEN?

RHOSWEN is 152m² according to the EPC inspection conducted in September 2023. This puts it in the largest 30% of detached houses houses in Llanrug, based on EPC data. The below chart shows the distribution of detached houses houses by size in Llanrug, and where RHOSWEN lies on this distribution: 80% of detached houses houses are smaller than RHOSWEN, and 20% of houses are larger. Note that EPC data is not available for all properties in Llanrug.

RHOSWEN: Plot and Title Map

RHOSWEN sits on a plot of roughly 0.141 of an acre, or 569m². The below map shows the location of RHOSWEN, 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 RHOSWEN). 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 RHOSWEN?

RHOSWEN is located in LLANRUG, in the LL55 postcode district. The below map shows the position of RHOSWEN in LLANRUG.