Over the past 30 years, there have been 56 property sales recorded in the NN9 5SY postcode area. The highest sale price reached £279,000, while the most recent sale was for a semi-detached house sold in December 2025 for £230,000.

The estimated average property value in NN9 5SY currently stands at £266,247, which is roughly in line with the city average (within ±8%), suggesting property prices reflect broader market trends.

In terms of size, the average price per square metre is approximately £2,796.

Property prices in NN9 5SY have risen by 4.9% over the past year , with a total increase of 26.2% over the past five years , and a long-term rise of 73.8% over the past decade .

The most common type of property sold in the area is semi-detached, making up around 93% of transactions , followed by detached.

Housing in NN9 5SY is predominantly owner-occupied, with an estimated 95% of homes being lived in by the owners.

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Property Sales

1 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Detached
🛏️ 5bed
📐 1093 sq ft
Today
£240,077
streetscan.co.uk estimate
26 Nov 2010
£124,995
More details

11 Mountfield Road, Irthlingborough, Wellingborough, North Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 4bed
📐 807 sq ft
Today
£255,043
streetscan.co.uk estimate
26 Jul 2023
£248,000
15 Aug 2014
£113,500
More details

13 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 797 sq ft
Today
£175,737
streetscan.co.uk estimate
26 Oct 2014
£100,000
More details

14 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 1221 sq ft
Today
£346,167
streetscan.co.uk estimate
17 Jul 2020
£275,500
26 May 2005
£159,000
View +1 more
More details

15 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£233,020
streetscan.co.uk estimate
8 May 2007
£128,000

18 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 904 sq ft
Today
£204,590
streetscan.co.uk estimate
19 Oct 2018
£160,000
More details

20 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 4bed
📐 797 sq ft
Today
£235,206
streetscan.co.uk estimate
7 Nov 2014
£135,000
19 Mar 2004
£112,000
View +1 more
More details

23 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 6bed
📐 1001 sq ft
Today
£300,061
streetscan.co.uk estimate
27 Apr 1999
£58,000
More details

25 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 932 sq ft
Today
£202,800
streetscan.co.uk estimate
3 Nov 2017
£150,000
22 Jun 2012
£124,000
More details

26 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£320,211
streetscan.co.uk estimate
20 Apr 2001
£78,000
30 Apr 1999
£65,300

27 Mountfield Road, Irthlingborough, Wellingborough, North Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 883 sq ft
Today
£241,189
streetscan.co.uk estimate
11 Sep 2025
£240,000
17 Mar 2023
£235,000
More details

28 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 958 sq ft
Today
£285,188
streetscan.co.uk estimate
6 Mar 1998
£49,500
More details

29 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£318,743
streetscan.co.uk estimate
2 Nov 2005
£160,000

3 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Detached
🛏️ 6bed
📐 1081 sq ft
Today
£339,927
streetscan.co.uk estimate
14 Aug 2009
£165,000
More details

31 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 6bed
📐 1302 sq ft
Today
£121,437
streetscan.co.uk estimate
31 Jan 2006
£60,000
22 Nov 2002
£102,000
View +1 more
More details

32 Mountfield Road, Irthlingborough, Wellingborough, North Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 6bed
📐 1227 sq ft
Today
£281,499
streetscan.co.uk estimate
14 Oct 2022
£279,000
24 May 2019
£197,000
View +1 more
More details

33 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 4bed
📐 945 sq ft
Today
£227,568
streetscan.co.uk estimate
21 Aug 2009
£107,500
More details

34 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 4bed
📐 926 sq ft
Today
£293,526
streetscan.co.uk estimate
11 Sep 1998
£55,000
30 Aug 1996
£46,950
More details

35 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£289,690
streetscan.co.uk estimate
15 Oct 1999
£59,995

36 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£316,875
streetscan.co.uk estimate
30 Oct 2002
£105,000

37 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 915 sq ft
Today
£248,255
streetscan.co.uk estimate
8 Oct 2007
£142,000
15 Dec 2006
£136,000
View +4 more
More details

38 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 6bed
📐 1259 sq ft
Today
£293,738
streetscan.co.uk estimate
17 Dec 2012
£146,000
9 Feb 2006
£146,000
View +1 more
More details

39 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£263,127
streetscan.co.uk estimate
13 Sep 1995
£41,000

40 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£318,743
streetscan.co.uk estimate
25 Nov 2005
£160,000

41 Mountfield Road, Irthlingborough, Wellingborough, North Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 947 sq ft
Today
£223,904
streetscan.co.uk estimate
31 Aug 2023
£217,500
31 May 2001
£69,500
More details

43 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 1001 sq ft
Today
£250,421
streetscan.co.uk estimate
22 Dec 2010
£122,000
More details

45 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£251,925
streetscan.co.uk estimate
27 Mar 1997
£40,000

47 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£310,657
streetscan.co.uk estimate
1 Dec 1999
£64,950

49 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 5bed
📐 986 sq ft
Today
£307,212
streetscan.co.uk estimate
6 Jul 2012
£153,000
1 Oct 2004
£166,000
More details

5 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£308,869
streetscan.co.uk estimate
28 Feb 1997
£53,500

6 Mountfield Road, Irthlingborough, Wellingborough, North Northamptonshire, NN9 5SY

🏠 Semi-detached
🛏️ 4bed
📐 797 sq ft
Today
£228,647
streetscan.co.uk estimate
19 Dec 2025
£230,000
4 May 2006
£137,000
More details

7 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

🏠 Detached
🛏️ 5bed
📐 1109 sq ft
Today
£331,000
streetscan.co.uk estimate
7 Apr 1997
£57,000
More details

8 Mountfield Road, Irthlingborough, Wellingborough, East Northamptonshire, Northamptonshire, NN9 5SY

Today
£286,865
streetscan.co.uk estimate
20 Nov 2001
£76,950

Area Insights

Data Sources

Properties at NN9 5SY appear fifty-six times in the Land Registry records, with the latest transaction recorded on 19 Dec 2025. It also has twenty-two Energy Performance Certificates (EPC) entries, the earliest dating back to 24 Jan 2018. We use this data, to estimate the property's characteristics and current market value.

This website uses public sector information from:

These datasets are licensed under the Open Government Licence v3.0.
This website is not affiliated with or endorsed by HM Land Registry or DLUHC.

Disclaimer: StreetScan.co.uk makes all reasonable efforts to ensure the information provided on this website is current and accurate; however, no warranties or representations are made as to its completeness or accuracy. StreetScan.co.uk expressly disclaims any and all liability for any loss, damage, or expense arising directly or indirectly from the use of, or reliance upon, such information.