BLACKTHORN COTTAGE, GRESHAM AVENUE, HARTLEY, LONGFIELD, DA3 7BT - £700,000

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.

BLACKTHORN COTTAGE is a small detached house of 127m², built sometime between 1967 and 1975. It was last sold for £700,000 in March 2025, which was around 29% below the average March 2025 detached price in the Sevenoaks local authority area. The most recent EPC inspection was November 2015, where the current energy rating was E, and the potential energy rating was C.

BLACKTHORN COTTAGE Sold Prices

Land registry data shows two sales for BLACKTHORN COTTAGE since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Sevenoaks local authority area for the corresponding sale date. Both of the two BLACKTHORN COTTAGE 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 31 MAR	£700,000	£979,643	29% below HPI
2016 3 OCT	£570,000	£765,869	26% below HPI

BLACKTHORN COTTAGE 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 two BLACKTHORN COTTAGE sales from October 2016 and March 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 October 2016 sale was for 26% below the HPI. So the extrapolation line tracks at 26% below the HPI over time, until the March 2025 sale, where it falls to 29% below the HPI. The line then continues to track at 29% below the HPI.

How Large is BLACKTHORN COTTAGE?

BLACKTHORN COTTAGE is 127m² according to the EPC inspection conducted in November 2015. This puts it in the smallest 40% 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 BLACKTHORN COTTAGE lies on this distribution: 37% of detached houses houses are smaller than BLACKTHORN COTTAGE, and 62% of houses are larger. Note that EPC data is not available for all properties in Hartley.

BLACKTHORN COTTAGE: Plot and Title Map

BLACKTHORN COTTAGE sits on a plot of roughly 0.228 of an acre, or 921m². The below map shows the location of BLACKTHORN COTTAGE, 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 BLACKTHORN COTTAGE). 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 BLACKTHORN COTTAGE?

BLACKTHORN COTTAGE is located on GRESHAM AVENUE in HARTLEY, in the DA3 postcode district. The below map shows the position of BLACKTHORN COTTAGE on GRESHAM AVENUE.