1A, HEOL ISAF, RADYR, CARDIFF, CF15 8AF - £794,950

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.

1A HEOL ISAF is a very large extended detached house of 240m², built sometime between 1967 and 1975, which could now be worth an estimated £831,126. It was last sold for £794,950 in July 2024, which was around 61% above the average July 2024 detached price in the Cardiff local authority area. The most recent EPC inspection was May 2023, where the current energy rating was C, and the potential energy rating was C.

1A HEOL ISAF Sold Prices

Land registry data shows three sales for 1A HEOL ISAF since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Cardiff local authority area for the corresponding sale date. All of the three 1A HEOL ISAF 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
2024 2 JUL	£794,950	£494,794	61% above HPI
2001 6 APR	£215,000	£151,580	42% above HPI
1997 11 SEP	£135,000	£109,597	23% above HPI

1A HEOL ISAF 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 three 1A HEOL ISAF sales between September 1997 and July 2024 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 April 2001 sale was for 42% above the HPI. So the extrapolation line tracks at 42% above the HPI over time, until the July 2024 sale, where it rises to 61% above the HPI. The line then continues to track at 61% above the HPI.

What might 1A HEOL ISAF be worth now?

1A HEOL ISAF might now be worth an estimated £831,126.

This is based on house price inflation of 4.6%, between July 2024 and June 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 4.6% inflationary increase is applied to the most recent sale price for 1A HEOL ISAF of £794,950 on 2nd July 2024. For the value to have increased from £794,950 to £831,126 over the one year and one month to June 2025, the following assumptions must hold true:

• The value of 1A HEOL ISAF has moved in line with the HPI for detached houses in the Cardiff local authority area.
• The July 2024 sale price of £794,950 represented a fair market value for the property.
• The size, condition, and specification of 1A HEOL ISAF has not materially changed since July 2024.

How Large is 1A HEOL ISAF?

1A HEOL ISAF is 240m², which includes two extensions, according to the EPC inspection conducted in May 2023. This puts it in the largest 10% of detached houses houses in Cardiff, based on EPC data. The below chart shows the distribution of detached houses houses by size in Cardiff, and where 1A HEOL ISAF lies on this distribution: 95% of detached houses houses are smaller than 1A HEOL ISAF, and 5% of houses are larger. Note that EPC data is not available for all properties in Cardiff.

1A HEOL ISAF: Plot and Title Map

1A HEOL ISAF sits on a plot of roughly 0.141 of an acre, or 570m². The below map shows the location of 1A HEOL ISAF, 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 1A HEOL ISAF). 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 1A HEOL ISAF?

1A HEOL ISAF is located in RADYR, in the CF15 postcode district. The below map shows the position of No. 1A on HEOL ISAF.