7, HEOL CEFN ONN, LISVANE, CARDIFF, CF14 0TP - £774,000

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.

7 HEOL CEFN ONN is a very large extended detached house of 190m², built sometime between 1976 and 1982. It was last sold for £774,000 in June 2025, which was around 50% above the average June 2025 detached price in the Cardiff local authority area. The most recent EPC inspection was February 2023, where the current energy rating was C, and the potential energy rating was B.

7 HEOL CEFN ONN Sold Prices

Land registry data shows three sales for 7 HEOL CEFN ONN 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 7 HEOL CEFN ONN 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 6 JUN	£774,000	£517,311	50% above HPI
2023 3 JUL	£760,000	£500,153	52% above HPI
2011 28 OCT	£320,000	£300,023	7% above HPI

7 HEOL CEFN ONN 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 7 HEOL CEFN ONN sales between October 2011 and June 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 July 2023 sale was for 52% above the HPI. So the extrapolation line tracks at 52% above the HPI over time, until the June 2025 sale, where it falls to 50% above the HPI. The line then continues to track at 50% above the HPI.

How Large is 7 HEOL CEFN ONN?

7 HEOL CEFN ONN is 190m², which includes two extensions, according to the EPC inspection conducted in February 2023. This puts it in the largest 20% 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 7 HEOL CEFN ONN lies on this distribution: 88% of detached houses houses are smaller than 7 HEOL CEFN ONN, and 12% of houses are larger. Note that EPC data is not available for all properties in Cardiff.

7 HEOL CEFN ONN: Plot and Title Map

7 HEOL CEFN ONN sits on a plot of roughly 0.114 of an acre, or 462m². The below map shows the location of 7 HEOL CEFN ONN, 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 7 HEOL CEFN ONN). 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 7 HEOL CEFN ONN?

7 HEOL CEFN ONN is located in LISVANE, in the CF14 postcode district. The below map shows the position of No. 7 on HEOL CEFN ONN.