20, DERWENT AVENUE, LONDON, NW7 3DZ - £455,000

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

20 DERWENT AVENUE is a very small extended detached house of 114m², built sometime between 1930 and 1949. It was last sold for £455,000 in September 2011, which was around 50% below the average September 2011 detached price in the Barnet local authority area. The most recent EPC inspection was June 2011, where the current energy rating was D, and the potential energy rating was D.

20 DERWENT AVENUE Sold Prices

Land registry data shows two sales for 20 DERWENT AVENUE since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Barnet local authority area for the corresponding sale date. Both of the two 20 DERWENT AVENUE sales were for below 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
2011 2 SEP	£455,000	£913,462	50% below HPI
2009 9 JUN	£382,000	£740,513	48% below HPI

20 DERWENT AVENUE Price Paid vs. HPI Average

The below graph shows the average detached house price in the Barnet local authority area over time, sourced from the HPI. The two 20 DERWENT AVENUE sales from June 2009 and September 2011 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 June 2009 sale was for 48% below the HPI. So the extrapolation line tracks at 48% below the HPI over time, until the September 2011 sale, where it falls to 50% below the HPI. The line then continues to track at 50% below the HPI.

What might 20 DERWENT AVENUE be worth now?

20 DERWENT AVENUE might now be worth an estimated £775,858.

This is based on house price inflation of 70.5%, between September 2011 and December 2024, for detached houses, in the Barnet local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 70.5% inflationary increase is applied to the most recent sale price for 20 DERWENT AVENUE of £455,000 on 2nd September 2011. For the value to have increased from £455,000 to £775,858 over the twelve years and nine months to December 2024, the following assumptions must hold true:

• The value of 20 DERWENT AVENUE has moved in line with the HPI for detached houses in the Barnet local authority area.
• The September 2011 sale price of £455,000 represented a fair market value for the property.
• The size, condition, and specification of 20 DERWENT AVENUE has not materially changed since September 2011.

How Large is 20 DERWENT AVENUE?

20 DERWENT AVENUE is 114m², which includes one extension, according to the EPC inspection conducted in June 2011. This puts it in the smallest 20% of detached houses houses in Edgware, based on EPC data. The below chart shows the distribution of detached houses houses by size in Edgware, and where 20 DERWENT AVENUE lies on this distribution: 15% of detached houses houses are smaller than 20 DERWENT AVENUE, and 85% of houses are larger. Note that EPC data is not available for all properties in Edgware.

20 DERWENT AVENUE: Plot and Title Map

20 DERWENT AVENUE sits on a plot of roughly 0.081 of an acre, or 328m². The below map shows the location of 20 DERWENT 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 20 DERWENT 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 20 DERWENT AVENUE?

20 DERWENT AVENUE is located in LONDON, in the NW7 postcode district. The below map shows the position of No. 20 on DERWENT AVENUE.