TREWEN, HEOL Y PARC, PENTYRCH, CARDIFF, CF15 9NB - £1,020,000

Based on the January 2025 Price Paid Data (released on 3rd March 2025), the December 2024 House Price Index (released on 19th February 2025), and the January 2025 Energy Performance of Buildings Data (released on 27th February 2025). Sources

TREWEN is a very large extended detached house of 345m², built sometime between 1900 and 1929, which could now be worth an estimated £1,396,651. It was last sold for £1,020,000 in February 2018, which was around 167% above the average February 2018 detached price in the Cardiff local authority area. The most recent EPC inspection was November 2017, where the current energy rating was C, and the potential energy rating was C.

TREWEN Sold Prices

Land registry data shows two sales for TREWEN since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Cardiff local authority area for the corresponding sale date. Both of the two TREWEN 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
2018 7 FEB	£1,020,000	£381,758	167% above HPI
2001 14 DEC	£499,000	£166,773	199% above HPI

TREWEN Price Paid vs. HPI Average

The below graph shows the average detached house price in the Cardiff local authority area over time, sourced from the HPI. The two TREWEN sales from December 2001 and February 2018 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 December 2001 sale was for 199% above the HPI. So the extrapolation line tracks at 199% above the HPI over time, until the February 2018 sale, where it falls to 167% above the HPI. The line then continues to track at 167% above the HPI.

What might TREWEN be worth now?

TREWEN might now be worth an estimated £1,396,651.

This is based on house price inflation of 36.9%, between February 2018 and February 2025, for detached houses, in the Cardiff local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 36.9% inflationary increase is applied to the most recent sale price for TREWEN of £1,020,000 on 7th February 2018. For the value to have increased from £1,020,000 to £1,396,651 over the seven years to February 2025, the following assumptions must hold true:

• The value of TREWEN has moved in line with the HPI for detached houses in the Cardiff local authority area.
• The February 2018 sale price of £1,020,000 represented a fair market value for the property.
• The size, condition, and specification of TREWEN has not materially changed since February 2018.

How Large is TREWEN?

TREWEN is 345m², which includes four extensions, according to the EPC inspection conducted in November 2017. This puts it in the largest 10% of detached houses houses in Pentyrch, based on EPC data. The below chart shows the distribution of detached houses houses by size in Pentyrch, and where TREWEN lies on this distribution: 98% of detached houses houses are smaller than TREWEN, and 1% of houses are larger. Note that EPC data is not available for all properties in Pentyrch.

TREWEN: Plot and Title Map

TREWEN sits on a plot of roughly 0.654 of an acre, or 2,647m². The below map shows the location of TREWEN, 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 TREWEN). 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 TREWEN?

TREWEN is located on HEOL Y PARC in PENTYRCH, in the CF15 postcode district. The below map shows the position of TREWEN on HEOL Y PARC.