17, THORNFIELD AVENUE, LONDON, NW7 1LT - £380,000

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.

17 THORNFIELD AVENUE is a very small detached house of 92m², built sometime between 1930 and 1949, which could now be worth an estimated £806,573. It was last sold for £380,000 in May 2009, which was around 48% below the average May 2009 detached price in the Barnet local authority area. The most recent EPC inspection was April 2009, where the current energy rating was D, and the potential energy rating was D.

17 THORNFIELD AVENUE Sold Prices

Land registry data shows two sales for 17 THORNFIELD 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 17 THORNFIELD 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
2009 29 MAY	£380,000	£733,378	48% below HPI
1999 20 JAN	£125,000	£346,331	64% below HPI

17 THORNFIELD 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 17 THORNFIELD AVENUE sales from January 1999 and May 2009 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 January 1999 sale was for 64% below the HPI. So the extrapolation line tracks at 64% below the HPI over time, until the May 2009 sale, where it rises to 48% below the HPI. The line then continues to track at 48% below the HPI.

What might 17 THORNFIELD AVENUE be worth now?

17 THORNFIELD AVENUE might now be worth an estimated £806,573.

This is based on house price inflation of 112.3%, between May 2009 and February 2025, 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 112.3% inflationary increase is applied to the most recent sale price for 17 THORNFIELD AVENUE of £380,000 on 29th May 2009. For the value to have increased from £380,000 to £806,573 over the sixteen years and three months to February 2025, the following assumptions must hold true:

• The value of 17 THORNFIELD AVENUE has moved in line with the HPI for detached houses in the Barnet local authority area.
• The May 2009 sale price of £380,000 represented a fair market value for the property.
• The size, condition, and specification of 17 THORNFIELD AVENUE has not materially changed since May 2009.

How Large is 17 THORNFIELD AVENUE?

17 THORNFIELD AVENUE is 92m² according to the EPC inspection conducted in April 2009. This puts it in the smallest 20% of detached houses houses in London, based on EPC data. The below chart shows the distribution of detached houses houses by size in London, and where 17 THORNFIELD AVENUE lies on this distribution: 14% of detached houses houses are smaller than 17 THORNFIELD AVENUE, and 86% of houses are larger. Note that EPC data is not available for all properties in London.

17 THORNFIELD AVENUE: Plot and Title Map

17 THORNFIELD AVENUE sits on a plot of roughly 0.096 of an acre, or 387m². The below map shows the location of 17 THORNFIELD 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 17 THORNFIELD 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 17 THORNFIELD AVENUE?

17 THORNFIELD AVENUE is located in LONDON, in the NW7 postcode district. The below map shows the position of No. 17 on THORNFIELD AVENUE.