GRIANFRYN, NEWBOROUGH, LLANFAIRPWLLGWYNGYLL, LL61 6PY - £250,000

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.

GRIANFRYN is a very small extended detached house of 92m², built sometime before 1900, which could now be worth an estimated £245,014. It was last sold for £250,000 in December 2025, which was around 25% below the average December 2025 detached price in the Isle of Anglesey local authority area. The most recent EPC inspection was May 2025, where the current energy rating was E, and the potential energy rating was A.

GRIANFRYN Sold Prices

Land registry data shows three sales for GRIANFRYN since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Isle of Anglesey local authority area for the corresponding sale date. All of the three GRIANFRYN 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 18 DEC	£250,000	£333,577	25% below HPI
2007 31 OCT	£150,000	£210,722	29% below HPI
2001 2 MAR	£54,000	£72,713	26% below HPI

GRIANFRYN Price Paid vs. HPI Average

The below graph shows the average detached house price in the Isle of Anglesey local authority area over time, sourced from the HPI. The three GRIANFRYN sales between March 2001 and December 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 October 2007 sale was for 29% below the HPI. So the extrapolation line tracks at 29% below the HPI over time, until the December 2025 sale, where it rises to 25% below the HPI. The line then continues to track at 25% below the HPI.

What might GRIANFRYN be worth now?

GRIANFRYN might now be worth an estimated £245,014.

This is based on house price deflation of 2%, between December 2025 and May 2026, for detached houses, in the Isle of Anglesey local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 2% deflationary decrease is applied to the most recent sale price for GRIANFRYN of £250,000 on 18th December 2025. For the value to have decreased from £250,000 to £245,014 over the one year and seven months to May 2026, the following assumptions must hold true:

• The value of GRIANFRYN has moved in line with the HPI for detached houses in the Isle of Anglesey local authority area.
• The December 2025 sale price of £250,000 represented a fair market value for the property.
• The size, condition, and specification of GRIANFRYN has not materially changed since December 2025.

How Large is GRIANFRYN?

GRIANFRYN is 92m², which includes one extension, according to the EPC inspection conducted in May 2025. This puts it in the smallest 20% of detached houses houses in Newborough, based on EPC data. The below chart shows the distribution of detached houses houses by size in Newborough, and where GRIANFRYN lies on this distribution: 18% of detached houses houses are smaller than GRIANFRYN, and 81% of houses are larger. Note that EPC data is not available for all properties in Newborough.

GRIANFRYN: Plot and Title Map

GRIANFRYN sits on a plot of roughly 0.093 of an acre, or 376m². The below map shows the location of GRIANFRYN, 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 GRIANFRYN). 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 GRIANFRYN?

GRIANFRYN is located in NEWBOROUGH, in the LL61 postcode district. The below map shows the position of GRIANFRYN in NEWBOROUGH.