6, THE KNOLL, GRENDON, NORTHAMPTON, NN7 1JG - £1,300,000

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

6 THE KNOLL is a very large extended detached house of 756m², built sometime between 1950 and 1966, which could now be worth an estimated £2,455,808. It was last sold for £1,300,000 in August 2010, which was around 502% above the average August 2010 detached price in the North Northamptonshire local authority area. The most recent EPC inspection was September 2022, where the current energy rating was D, and the potential energy rating was C.

6 THE KNOLL Sold Prices

Land registry data shows three sales for 6 THE KNOLL since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the North Northamptonshire local authority area for the corresponding sale date. All of the three 6 THE KNOLL 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
2010 27 AUG	£1,300,000	£215,846	502% above HPI
2009 30 SEP	£1,500,000	£202,397	641% above HPI
2003 9 OCT	£675,000	£180,692	274% above HPI

6 THE KNOLL Price Paid vs. HPI Average

The below graph shows the average detached house price in the North Northamptonshire local authority area over time, sourced from the HPI. The three 6 THE KNOLL sales between October 2003 and August 2010 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 September 2009 sale was for 641% above the HPI. So the extrapolation line tracks at 641% above the HPI over time, until the August 2010 sale, where it falls to 502% above the HPI. The line then continues to track at 502% above the HPI.

What might 6 THE KNOLL be worth now?

6 THE KNOLL might now be worth an estimated £2,455,808.

This is based on house price inflation of 88.9%, between August 2010 and February 2025, for detached houses, in the North Northamptonshire local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 88.9% inflationary increase is applied to the most recent sale price for 6 THE KNOLL of £1,300,000 on 27th August 2010. For the value to have increased from £1,300,000 to £2,455,808 over the fifteen years and six months to February 2025, the following assumptions must hold true:

• The value of 6 THE KNOLL has moved in line with the HPI for detached houses in the North Northamptonshire local authority area.
• The August 2010 sale price of £1,300,000 represented a fair market value for the property.
• The size, condition, and specification of 6 THE KNOLL has not materially changed since August 2010.

How Large is 6 THE KNOLL?

6 THE KNOLL is 756m², which includes four extensions, according to the EPC inspection conducted in September 2022. This puts it in the largest 10% of detached houses houses in Grendon, based on EPC data. The below chart shows the distribution of detached houses houses by size in Grendon, and where 6 THE KNOLL lies on this distribution: More than 99% of detached houses houses are smaller than 6 THE KNOLL, and less than 1% of houses are larger. Note that EPC data is not available for all properties in Grendon.

6 THE KNOLL: Plot and Title Map

6 THE KNOLL sits on a plot of roughly 3.8 acres, or 15,330m². The below map shows the location of 6 THE KNOLL, 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 6 THE KNOLL). 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 6 THE KNOLL?

6 THE KNOLL is located in GRENDON, in the NN7 postcode district. The below map shows the position of No. 6 on THE KNOLL.