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 MIDDLE GRASS is a very small extended semi-detached house of 56m², built sometime between 1996 and 2002, which could now be worth an estimated £225,632. It was last sold for £155,000 in February 2017, which was around 11% below the average February 2017 semi-detached price in the North Northamptonshire local authority area. The most recent EPC inspection was November 2009, where the current energy rating was C, and the potential energy rating was C.
Land registry data shows nine sales for 20 MIDDLE GRASS since 1st January 1995. The below table shows the price paid for the nine sales, along with the average semi-detached price in the North Northamptonshire local authority area for the corresponding sale date. Most of the nine 20 MIDDLE GRASS 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 |
|---|---|---|---|
2017 24 FEB | £155,000 | £173,873 | 11% below HPI |
2014 19 DEC | £128,000 | £144,802 | 12% below HPI |
2007 13 MAR | £130,000 | £135,341 | 4% below HPI |
2006 13 JUL | £124,995 | £128,600 | 3% below HPI |
2002 3 SEP | £81,500 | £82,768 | 2% below HPI |
2002 18 JAN | £66,600 | £69,381 | 4% below HPI |
2001 6 APR | £60,000 | £61,465 | 2% below HPI |
2001 16 JAN | £53,950 | £60,180 | 10% below HPI |
1998 30 JUN | £55,950 | £46,105 | 21% 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 nine 20 MIDDLE GRASS sales between June 1998 and February 2017 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 December 2014 sale was for 12% below the HPI. So the extrapolation line tracks at 12% below the HPI over time, until the February 2017 sale, where it rises to 11% below the HPI. The line then continues to track at 11% below the HPI.

20 MIDDLE GRASS might now be worth an estimated £225,632.
This is based on house price inflation of 45.6%, between February 2017 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 45.6% inflationary increase is applied to the most recent sale price for 20 MIDDLE GRASS of £155,000 on 24th February 2017. For the value to have increased from £155,000 to £225,632 over the eight years and nine months to May 2026, the following assumptions must hold true:
20 MIDDLE GRASS is 56m², which includes one extension, according to the EPC inspection conducted in November 2009. 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 20 MIDDLE GRASS lies on this distribution: 1% of semi-detached houses houses are smaller than 20 MIDDLE GRASS, and 99% of houses are larger. Note that EPC data is not available for all properties in Irthlingborough.

20 MIDDLE GRASS sits on a plot of roughly 0.059 of an acre, or 238m². The below map shows the location of 20 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 20 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.

20 MIDDLE GRASS is located in IRTHLINGBOROUGH, in the NN9 postcode district. The below map shows the position of No. 20 on MIDDLE GRASS.

Most recent sales first: