415, BLACKFEN ROAD, SIDCUP, DA15 9NN - £392,500

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.

415 BLACKFEN ROAD is a midsized extended semi-detached house of 144m², built sometime between 1930 and 1949, which could now be worth an estimated £631,043. It was last sold for £392,500 in November 2014, which was around 21% above the average November 2014 semi-detached price in the Bexley local authority area. The most recent EPC inspection was December 2024, where the current energy rating was C, and the potential energy rating was B.

415 BLACKFEN ROAD Sold Prices

Land registry data shows two sales for 415 BLACKFEN ROAD since 1^st January 1995. The below table shows the price paid for the two sales, along with the average semi-detached price in the Bexley local authority area for the corresponding sale date. Both of the two 415 BLACKFEN ROAD 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
2014 7 NOV	£392,500	£323,192	21% above HPI
1997 14 NOV	£95,000	£92,266	3% above HPI

415 BLACKFEN ROAD Price Paid vs. HPI Average

The below graph shows the average semi-detached house price in the Bexley local authority area over time, sourced from the HPI. The two 415 BLACKFEN ROAD sales from November 1997 and November 2014 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 November 1997 sale was for 3% above the HPI. So the extrapolation line tracks at 3% above the HPI over time, until the November 2014 sale, where it rises to 21% above the HPI. The line then continues to track at 21% above the HPI.

What might 415 BLACKFEN ROAD be worth now?

415 BLACKFEN ROAD might now be worth an estimated £631,043.

This is based on house price inflation of 60.8%, between November 2014 and February 2025, for semi-detached houses, in the Bexley local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 60.8% inflationary increase is applied to the most recent sale price for 415 BLACKFEN ROAD of £392,500 on 7th November 2014. For the value to have increased from £392,500 to £631,043 over the eleven years and nine months to February 2025, the following assumptions must hold true:

• The value of 415 BLACKFEN ROAD has moved in line with the HPI for semi-detached houses in the Bexley local authority area.
• The November 2014 sale price of £392,500 represented a fair market value for the property.
• The size, condition, and specification of 415 BLACKFEN ROAD has not materially changed since November 2014.

How Large is 415 BLACKFEN ROAD?

415 BLACKFEN ROAD is 144m², which includes two extensions, according to the EPC inspection conducted in December 2024. This puts it in the largest 50% of semi-detached houses houses in London, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in London, and where 415 BLACKFEN ROAD lies on this distribution: 50% of semi-detached houses houses are smaller than 415 BLACKFEN ROAD, and 50% of houses are larger. Note that EPC data is not available for all properties in London.

415 BLACKFEN ROAD: Plot and Title Map

415 BLACKFEN ROAD sits on a plot of roughly 0.117 of an acre, or 473m². The below map shows the location of 415 BLACKFEN ROAD, 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 415 BLACKFEN ROAD). 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 415 BLACKFEN ROAD?

415 BLACKFEN ROAD is located in SIDCUP, in the DA15 postcode district. The below map shows the position of No. 415 on BLACKFEN ROAD.