1, MIDDLE GRASS, IRTHLINGBOROUGH, WELLINGBOROUGH, NN9 5TW - £305,000

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.

1 MIDDLE GRASS is a midsized extended detached house of 107m², built sometime between 1996 and 2002. It was last sold for £305,000 in May 2026, which was around 26% below the average May 2026 detached price in the North Northamptonshire local authority area. The most recent EPC inspection was February 2026, where the current energy rating was C, and the potential energy rating was C.

1 MIDDLE GRASS Sold Prices

Land registry data shows five sales for 1 MIDDLE GRASS since 1^st January 1995. The below table shows the price paid for the five sales, along with the average detached price in the North Northamptonshire local authority area for the corresponding sale date. Most of the five 1 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
2026 29 MAY	£305,000	£409,905	26% below HPI
2011 10 JUN	£185,000	£209,836	12% below HPI
2002 6 SEP	£137,500	£149,807	8% below HPI
2002 11 JUL	£118,000	£143,426	18% below HPI
1999 9 FEB	£96,500	£83,496	16% above HPI

1 MIDDLE GRASS 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 five 1 MIDDLE GRASS sales between February 1999 and May 2026 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 2011 sale was for 12% below the HPI. So the extrapolation line tracks at 12% below the HPI over time, until the May 2026 sale, where it falls to 26% below the HPI. The line then continues to track at 26% below the HPI.

How Large is 1 MIDDLE GRASS?

1 MIDDLE GRASS is 107m², which includes one extension, according to the EPC inspection conducted in February 2026. This puts it in the largest 50% of detached houses houses in Irthlingborough, based on EPC data. The below chart shows the distribution of detached houses houses by size in Irthlingborough, and where 1 MIDDLE GRASS lies on this distribution: 57% of detached houses houses are smaller than 1 MIDDLE GRASS, and 43% of houses are larger. Note that EPC data is not available for all properties in Irthlingborough.

1 MIDDLE GRASS: Plot and Title Map

1 MIDDLE GRASS sits on a plot of roughly 0.084 of an acre, or 340m². The below map shows the location of 1 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 1 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.

Where is 1 MIDDLE GRASS?

1 MIDDLE GRASS is located in IRTHLINGBOROUGH, in the NN9 postcode district. The below map shows the position of No. 1 on MIDDLE GRASS.