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21, MILL ROAD, ISLIP, KETTERING, NN14 3LB - £230,000

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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.

21 MILL ROAD is a small extended semi-detached house of 109m², built sometime between 1900 and 1929, which could now be worth an estimated £300,029. It was last sold for £230,000 in April 2018, which was around 20% above the average April 2018 semi-detached price in the North Northamptonshire local authority area. The most recent EPC inspection was October 2017, where the current energy rating was D, and the potential energy rating was C.

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21 MILL ROAD Sold Prices

Land registry data shows two sales for 21 MILL ROAD since 1st January 1995. The below table shows the price paid for the two sales, along with the average semi-detached price in the North Northamptonshire local authority area for the corresponding sale date. Both of the two 21 MILL ROAD sales were for above the average price. The average price is sourced from the Office for National Statistics' House Price Index (HPI).

DatePriceHPI PriceVariation from HPI
2018
16 APR
£230,000£191,994
up arrow
20% above HPI
1996
20 SEP
£75,000£39,430
up arrow
90% above HPI

21 MILL ROAD Price Paid vs. HPI Average

The below graph shows the average semi-detached house price in the North Northamptonshire local authority area over time, sourced from the HPI. The two 21 MILL ROAD sales from September 1996 and April 2018 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 1996 sale was for 90% above the HPI. So the extrapolation line tracks at 90% above the HPI over time, until the April 2018 sale, where it falls to 20% above the HPI. The line then continues to track at 20% above the HPI.

21, MILL ROAD, ISLIP, KETTERING, NN14 3LB: Price paid vs HM Land Registry's House Price Index

What might 21 MILL ROAD be worth now?

21 MILL ROAD might now be worth an estimated £300,029.

This is based on house price inflation of 30.4%, between April 2018 and April 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 30.4% inflationary increase is applied to the most recent sale price for 21 MILL ROAD of £230,000 on 16th April 2018. For the value to have increased from £230,000 to £300,029 over the eight years to April 2026, the following assumptions must hold true:

  • The value of 21 MILL ROAD has moved in line with the HPI for semi-detached houses in the North Northamptonshire local authority area.
  • The April 2018 sale price of £230,000 represented a fair market value for the property.
  • The size, condition, and specification of 21 MILL ROAD has not materially changed since April 2018.
Disclaimer: Please note that this is a theoretical estimate based on assumptions which may or may not be correct. It should not be relied on for any purpose.

How Large is 21 MILL ROAD?

21 MILL ROAD is 109m², which includes four extensions, according to the EPC inspection conducted in October 2017. This puts it in the smallest 30% of semi-detached houses houses in Islip, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Islip, and where 21 MILL ROAD lies on this distribution: 21% of semi-detached houses houses are smaller than 21 MILL ROAD, and 77% of houses are larger. Note that EPC data is not available for all properties in Islip.

21, MILL ROAD, ISLIP, KETTERING, NN14 3LB: Size of property relative to semi-detached houses in Islip

21 MILL ROAD: Plot and Title Map

21 MILL ROAD sits on a plot of roughly 0.078 of an acre, or 316m². The below map shows the location of 21 MILL ROAD, 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 21 MILL ROAD). 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.

21, MILL ROAD, ISLIP, KETTERING, NN14 3LB: Plot and title map

Where is 21 MILL ROAD?

21 MILL ROAD is located in ISLIP, in the NN14 postcode district. The below map shows the position of No. 21 on MILL ROAD.

21, MILL ROAD, ISLIP, KETTERING, NN14 3LB: Location map and indicative extent of plot

All property sales on MILL ROAD

Most recent sales first:

Full data available
2026
23 FEB
£580,000
Full data available
2024
11 JUL
£192,000
Full data available
2021
2 AUG
£335,000
Full data available
2018
16 APR
£230,000
Limited data available
2017
5 APR
£110,000
Full data available
2016
26 FEB
£214,950
Full data available
2014
16 OCT
£1,275,000
Limited data available
2012
6 JUL
£145,000
Full data available
2010
20 MAY
£800,000
Full data available
2007
24 AUG
£222,000
Full data available
2007
9 FEB
£240,000
Full data available
2007
9 FEB
£185,000
Full data available
2006
5 MAY
£150,000
Limited data available
2005
19 DEC
£159,000
Limited data available
2005
9 SEP
£240,000
Limited data available
2005
6 MAY
£159,000
Limited data available
2003
17 DEC
£235,000
Full data available
2003
5 NOV
£491,000
Full data available
2003
11 APR
£230,000
Limited data available
2003
5 FEB
£128,500
Full data available
2002
9 SEP
£147,500
Limited data available
2002
28 JUN
£105,000
Limited data available
2002
3 APR
£116,995
Limited data available
2002
22 FEB
£80,000
Limited data available
2001
24 SEP
£93,950
Full data available
2001
21 SEP
£139,950
Limited data available
2000
3 NOV
£89,000
Limited data available
2000
1 SEP
£123,000
Limited data available
2000
7 JAN
£73,000
Full data available
1999
19 NOV
£72,000
Limited data available
1999
1 JUL
£78,500
Full data available
1999
15 JAN
£277,000
Full data available
1998
30 APR
£400,000
Limited data available
1998
27 MAR
£125,000
Limited data available
1998
4 MAR
£65,000
Limited data available
1997
10 APR
£72,000
Full data available
1996
20 SEP
£75,000
Source: HM Land Registry Price Paid Data
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Source: HM Land Registry UK House Price Index
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Copyright statement: This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use.