1, KEYSTONE, NORTHAMPTON, NN4 9QZ - £485,000

Based on the December 2024 Price Paid Data (released on 29th January 2025), the November 2024 House Price Index (released on 15th January 2025), and the December 2024 Energy Performance of Buildings Data (released on 31st January 2025). Sources

1 KEYSTONE is a large extended detached house of 136m², built sometime between 2003 and 2006. It was last sold for £485,000 in September 2024, which was around 5% above the average September 2024 detached price in the West Northamptonshire local authority area. The most recent EPC inspection was July 2015, where the current energy rating was C, and the potential energy rating was B.

1 KEYSTONE Sold Prices

Land registry data shows two sales for 1 KEYSTONE since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the West Northamptonshire local authority area for the corresponding sale date. Both of the two 1 KEYSTONE 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
2024 3 SEP	£485,000	£462,848	5% above HPI
2001 29 JUN	£214,000	£159,838	34% above HPI

1 KEYSTONE Price Paid vs. HPI Average

The below graph shows the average detached house price in the West Northamptonshire local authority area over time, sourced from the HPI. The two 1 KEYSTONE sales from June 2001 and September 2024 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 June 2001 sale was for 34% above the HPI. So the extrapolation line tracks at 34% above the HPI over time, until the September 2024 sale, where it falls to 5% above the HPI. The line then continues to track at 5% above the HPI.

How Large is 1 KEYSTONE?

1 KEYSTONE is 136m², which includes one extension, according to the EPC inspection conducted in July 2015. This puts it in the largest 30% of detached houses in Northampton, based on EPC data. The below chart shows the distribution of detached houses by size in Northampton, and where 1 KEYSTONE lies on this distribution: 73% of detached houses are smaller than 1 KEYSTONE, and 27% of houses are larger. Note that EPC data is not available for all properties in Northampton.

1 KEYSTONE: Plot and Title Map

1 KEYSTONE sits on a plot of roughly 0.095 of an acre, or 383m². The below map shows the location of 1 KEYSTONE, 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 1 KEYSTONE). 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 1 KEYSTONE?

1 KEYSTONE is located in NORTHAMPTON, in the NN4 postcode district. The below map shows the position of No. 1 on KEYSTONE.