40, LLANDENNIS AVENUE, CARDIFF, CF23 6JH - £900,000

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.

40 LLANDENNIS AVENUE is a very large extended detached house of 215m², built sometime between 1930 and 1949. It was last sold for £900,000 in February 2025, which was around 72% above the average February 2025 detached price in the Cardiff local authority area. The most recent EPC inspection was June 2023, where the current energy rating was D, and the potential energy rating was C.

40 LLANDENNIS AVENUE Sold Prices

Land registry data shows three sales for 40 LLANDENNIS AVENUE 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 40 LLANDENNIS AVENUE 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 14 FEB	£900,000	£522,728	72% above HPI
2001 9 MAY	£375,000	£152,226	146% above HPI
1998 4 SEP	£180,000	£117,466	53% above HPI

40 LLANDENNIS AVENUE 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 40 LLANDENNIS AVENUE sales between September 1998 and February 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 May 2001 sale was for 146% above the HPI. So the extrapolation line tracks at 146% above the HPI over time, until the February 2025 sale, where it falls to 72% above the HPI. The line then continues to track at 72% above the HPI.

How Large is 40 LLANDENNIS AVENUE?

40 LLANDENNIS AVENUE is 215m², which includes four extensions, according to the EPC inspection conducted in June 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 40 LLANDENNIS AVENUE lies on this distribution: 92% of detached houses houses are smaller than 40 LLANDENNIS AVENUE, and 7% of houses are larger. Note that EPC data is not available for all properties in Cardiff.

40 LLANDENNIS AVENUE: Plot and Title Map

40 LLANDENNIS AVENUE sits on a plot of roughly 0.131 of an acre, or 531m². The below map shows the location of 40 LLANDENNIS AVENUE, 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 40 LLANDENNIS AVENUE). 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 40 LLANDENNIS AVENUE?

40 LLANDENNIS AVENUE is located in CARDIFF, in the CF23 postcode district. The below map shows the position of No. 40 on LLANDENNIS AVENUE.