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.
ALTWOOD is a very large extended detached house of 282m², built sometime between 1967 and 1975, which could now be worth an estimated £801,136. It was last sold for £635,000 in June 2021, which was around 49% above the average June 2021 detached price in the Vale of Glamorgan local authority area. The most recent EPC inspection was August 2020, where the current energy rating was D, and the potential energy rating was C.
Land registry data shows two sales for ALTWOOD since 1st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Vale of Glamorgan local authority area for the corresponding sale date. Both of the two ALTWOOD 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 2 JUN | £635,000 | £427,258 | 49% above HPI |
2014 9 MAY | £445,000 | £317,300 | 40% above HPI |
The below graph shows the average detached house price in the Vale of Glamorgan local authority area over time, sourced from the HPI. The two ALTWOOD sales from May 2014 and June 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 May 2014 sale was for 40% above the HPI. So the extrapolation line tracks at 40% above the HPI over time, until the June 2021 sale, where it rises to 49% above the HPI. The line then continues to track at 49% above the HPI.

ALTWOOD might now be worth an estimated £801,136.
This is based on house price inflation of 26.2%, between June 2021 and July 2026, for detached houses, in the Vale of Glamorgan local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 26.2% inflationary increase is applied to the most recent sale price for ALTWOOD of £635,000 on 2nd June 2021. For the value to have increased from £635,000 to £801,136 over the four years and eleven months to July 2026, the following assumptions must hold true:
ALTWOOD is 282m², which includes one extension, according to the EPC inspection conducted in August 2020. This puts it in the largest 10% of detached houses houses in Graig Penllyn, based on EPC data. The below chart shows the distribution of detached houses houses by size in Graig Penllyn, and where ALTWOOD lies on this distribution: 94% of detached houses houses are smaller than ALTWOOD, and 6% of houses are larger. Note that EPC data is not available for all properties in Graig Penllyn.

ALTWOOD sits on a plot of roughly 0.373 of an acre, or 1,508m². The below map shows the location of ALTWOOD, 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 ALTWOOD). 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.

ALTWOOD is located in GRAIG PENLLYN, in the CF71 postcode district. The below map shows the position of ALTWOOD in GRAIG PENLLYN.
