15, OLD DOWNS, HARTLEY, LONGFIELD, DA3 7AA - £910,000

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.

15 OLD DOWNS is a large extended detached house of 176m², built sometime between 1967 and 1975, which could now be worth an estimated £924,842. It was last sold for £910,000 in November 2025, which was around 9% below the average November 2025 detached price in the Sevenoaks local authority area. The most recent EPC inspection was July 2024, where the current energy rating was C, and the potential energy rating was C.

15 OLD DOWNS Sold Prices

Land registry data shows six sales for 15 OLD DOWNS since 1^st January 1995. The below table shows the price paid for the six sales, along with the average detached price in the Sevenoaks local authority area for the corresponding sale date. Most of the six 15 OLD DOWNS 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
2025 14 NOV	£910,000	£1,004,330	9% below HPI
2022 11 JUL	£881,500	£957,653	8% below HPI
2016 26 JUL	£700,000	£758,629	8% below HPI
2007 20 FEB	£535,000	£497,692	7% above HPI
2003 27 NOV	£349,500	£426,526	18% below HPI
1997 19 MAR	£185,000	£183,935	1% above HPI

15 OLD DOWNS Price Paid vs. HPI Average

The below graph shows the average detached house price in the Sevenoaks local authority area over time, sourced from the HPI. The six 15 OLD DOWNS sales between March 1997 and November 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 2022 sale was for 8% below the HPI. So the extrapolation line tracks at 8% below the HPI over time, until the November 2025 sale, where it falls to 9% below the HPI. The line then continues to track at 9% below the HPI.

What might 15 OLD DOWNS be worth now?

15 OLD DOWNS might now be worth an estimated £924,842.

This is based on house price inflation of 1.6%, between November 2025 and April 2026, for detached houses, in the Sevenoaks local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 1.6% inflationary increase is applied to the most recent sale price for 15 OLD DOWNS of £910,000 on 14th November 2025. For the value to have increased from £910,000 to £924,842 over the one year and seven months to April 2026, the following assumptions must hold true:

• The value of 15 OLD DOWNS has moved in line with the HPI for detached houses in the Sevenoaks local authority area.
• The November 2025 sale price of £910,000 represented a fair market value for the property.
• The size, condition, and specification of 15 OLD DOWNS has not materially changed since November 2025.

How Large is 15 OLD DOWNS?

15 OLD DOWNS is 176m², which includes one extension, according to the EPC inspection conducted in July 2024. This puts it in the largest 30% of detached houses houses in Hartley, based on EPC data. The below chart shows the distribution of detached houses houses by size in Hartley, and where 15 OLD DOWNS lies on this distribution: 73% of detached houses houses are smaller than 15 OLD DOWNS, and 26% of houses are larger. Note that EPC data is not available for all properties in Hartley.

15 OLD DOWNS: Plot and Title Map

15 OLD DOWNS sits on a plot of roughly 0.185 of an acre, or 750m². The below map shows the location of 15 OLD DOWNS, 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 15 OLD DOWNS). 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 15 OLD DOWNS?

15 OLD DOWNS is located in HARTLEY, in the DA3 postcode district. The below map shows the position of No. 15 on OLD DOWNS.