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.
8 MIDDLE GRASS is a very small semi-detached house of 57m², built sometime between 1983 and 1990, which could now be worth an estimated £221,038. It was last sold for £89,500 in September 2003, which was around 13% below the average September 2003 semi-detached price in the North Northamptonshire local authority area. The most recent EPC inspection was November 2013, where the current energy rating was D, and the potential energy rating was B.
Land registry data shows three sales for 8 MIDDLE GRASS since 1st January 1995. The below table shows the price paid for the three sales, along with the average semi-detached price in the North Northamptonshire local authority area for the corresponding sale date. Two of the three 8 MIDDLE GRASS sales were for below the average price, whilst one was 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 |
|---|---|---|---|
2003 5 SEP | £89,500 | £102,484 | 13% below HPI |
2001 23 MAR | £59,000 | £61,107 | 3% below HPI |
1998 16 OCT | £51,500 | £47,746 | 8% above HPI |
The below graph shows the average semi-detached house price in the North Northamptonshire local authority area over time, sourced from the HPI. The three 8 MIDDLE GRASS sales between October 1998 and September 2003 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 March 2001 sale was for 3% below the HPI. So the extrapolation line tracks at 3% below the HPI over time, until the September 2003 sale, where it falls to 13% below the HPI. The line then continues to track at 13% below the HPI.

8 MIDDLE GRASS might now be worth an estimated £221,038.
This is based on house price inflation of 147%, between September 2003 and May 2026, for semi-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 147% inflationary increase is applied to the most recent sale price for 8 MIDDLE GRASS of £89,500 on 5th September 2003. For the value to have increased from £89,500 to £221,038 over the 23 years and four months to May 2026, the following assumptions must hold true:
8 MIDDLE GRASS is 57m² according to the EPC inspection conducted in November 2013. This puts it in the smallest 10% of semi-detached houses houses in Irthlingborough, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Irthlingborough, and where 8 MIDDLE GRASS lies on this distribution: 1% of semi-detached houses houses are smaller than 8 MIDDLE GRASS, and 99% of houses are larger. Note that EPC data is not available for all properties in Irthlingborough.

8 MIDDLE GRASS sits on a plot of roughly 0.040 of an acre, or 160m². The below map shows the location of 8 MIDDLE GRASS, 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 8 MIDDLE GRASS). 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.

8 MIDDLE GRASS is located in IRTHLINGBOROUGH, in the NN9 postcode district. The below map shows the position of No. 8 on MIDDLE GRASS.

Most recent sales first: