20, BLACKTHORN GRANGE, THAME, OX9 3GG - £1,250,000

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.

20 BLACKTHORN GRANGE is a very large detached house of 293m², which could now be worth an estimated £1,224,812. It was last sold for £1,250,000 in January 2025, which was around 62% above the average January 2025 detached price in the South Oxfordshire local authority area. The most recent EPC inspection was July 2018, where the current energy rating was B, and the potential energy rating was B.

20 BLACKTHORN GRANGE Sold Prices

Land registry data shows two sales for 20 BLACKTHORN GRANGE since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the South Oxfordshire local authority area for the corresponding sale date. Both of the two 20 BLACKTHORN GRANGE 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
2025 27 JAN	£1,250,000	£773,228	62% above HPI
2018 30 JUL	£975,000	£633,392	54% above HPI

20 BLACKTHORN GRANGE Price Paid vs. HPI Average

The below graph shows the average detached house price in the South Oxfordshire local authority area over time, sourced from the HPI. The two 20 BLACKTHORN GRANGE sales from July 2018 and January 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 2018 sale was for 54% above the HPI. So the extrapolation line tracks at 54% above the HPI over time, until the January 2025 sale, where it rises to 62% above the HPI. The line then continues to track at 62% above the HPI.

What might 20 BLACKTHORN GRANGE be worth now?

20 BLACKTHORN GRANGE might now be worth an estimated £1,224,812.

This is based on house price deflation of 2%, between January 2025 and July 2025, for detached houses, in the South Oxfordshire local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 2% deflationary decrease is applied to the most recent sale price for 20 BLACKTHORN GRANGE of £1,250,000 on 27th January 2025. For the value to have decreased from £1,250,000 to £1,224,812 over the six months to July 2025, the following assumptions must hold true:

• The value of 20 BLACKTHORN GRANGE has moved in line with the HPI for detached houses in the South Oxfordshire local authority area.
• The January 2025 sale price of £1,250,000 represented a fair market value for the property.
• The size, condition, and specification of 20 BLACKTHORN GRANGE has not materially changed since January 2025.

How Large is 20 BLACKTHORN GRANGE?

20 BLACKTHORN GRANGE is 293m² according to the EPC inspection conducted in July 2018. This puts it in the largest 10% of detached houses houses in Thame, based on EPC data. The below chart shows the distribution of detached houses houses by size in Thame, and where 20 BLACKTHORN GRANGE lies on this distribution: More than 99% of detached houses houses are smaller than 20 BLACKTHORN GRANGE, and less than 1% of houses are larger. Note that EPC data is not available for all properties in Thame.

20 BLACKTHORN GRANGE: Plot and Title Map

20 BLACKTHORN GRANGE sits on a plot of roughly 0.149 of an acre, or 601m². The below map shows the location of 20 BLACKTHORN GRANGE, 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 BLACKTHORN GRANGE). 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 BLACKTHORN GRANGE?

20 BLACKTHORN GRANGE is located in THAME, in the OX9 postcode district. The below map shows the position of No. 20 on BLACKTHORN GRANGE.