12, Northwick Avenue, Harrow occupies a 506 m² plot as recorded by HM Land Registry.

All 33 other houses in this postcode have recorded plot sizes, and this one ranks as the 5th largest.

12, Northwick Avenue, Harrow has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 31 Jul 2012.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and underfloor heating (mains gas).

12, Northwick Avenue, Harrow last changed hands on 16th October 2008, selling for £600,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has risen by 68.1% since October 2008.

• Sold Oct 2008£600,000
• Sold Dec 1998£247,500
• Sold Jul 1996£158,000

Land Registry records and our Estate Agent network show 25 sales of comparable properties within 600 metres of 12, Northwick Avenue, Harrow since 2008.

Most recently, 3, Flambard Road, Harrow, HA1 2NB, a freehold house, sold at £915,000 on the 2nd April 2026.

Read more about house prices in HA3.

• Sold Apr 2026£915,000 | 5 Bed House3, Flambard Road, Harrow, HA1 2NB3, Flambard Road, Harrow, HA1 2NB
• Sold Mar 2025£975,000 | 5 Bed House10, Flambard Road, Harrow, HA1 2NA10, Flambard Road, Harrow, HA1 2NA
• Sold Dec 2024£1,510,777 | 5 Bed House74, Kenton Road, Harrow, HA3 8AE74, Kenton Road, Harrow, HA3 8AE
• Sold Oct 2024£927,000 | 5 Bed House21, Kenton Road, Harrow, HA1 2BW21, Kenton Road, Harrow, HA1 2BW
• Sold May 2024£890,000 | 5 Bed House10, Churchill Avenue, Harrow, HA3 0AY10, Churchill Avenue, Harrow, HA3 0AY
• Sold Mar 2024£880,000 | 5 Bed House16, Woodway Crescent, Harrow, HA1 2NQ16, Woodway Crescent, Harrow, HA1 2NQ
• Sold Feb 2024£815,000 | 5 Bed House6 Croft Villas, Bonnersfield Lane, Harrow, HA1 2LF6 Croft Villas, Bonnersfield Lane, Harrow, HA1 2LF
• Sold Sep 2023£850,000 | 5 Bed House9, Northwick Park Road, Harrow, HA1 2NY9, Northwick Park Road, Harrow, HA1 2NY
• Sold Sep 2023£760,000 | 5 Bed House27, Flambard Road, Harrow, HA1 2NB27, Flambard Road, Harrow, HA1 2NB
• Sold May 2023£960,000 | 5 Bed House1, Rushout Avenue, Harrow, HA3 0AS1, Rushout Avenue, Harrow, HA3 0AS
• Sold Mar 2023£900,000 | 5 Bed House12, Elmwood Avenue, Harrow, HA3 8AH12, Elmwood Avenue, Harrow, HA3 8AH
• Sold Feb 2022£810,000 | 5 Bed House14, Ashburnham Gardens, Harrow, HA1 2JH14, Ashburnham Gardens, Harrow, HA1 2JH
• Sold Aug 2021£900,000 | 5 Bed House63, Gayton Road, Harrow, HA1 2LU63, Gayton Road, Harrow, HA1 2LU
• Sold Apr 2021£930,000 | 5 Bed House9A, Elmwood Avenue, Harrow, HA3 8AJ9A, Elmwood Avenue, Harrow, HA3 8AJ
• Sold Oct 2017£780,000 | 5 Bed House61, Gayton Road, Harrow, HA1 2LU61, Gayton Road, Harrow, HA1 2LU
• Sold Dec 2016£600,000 | 5 Bed House20, Northwick Avenue, Harrow, HA3 0AB20, Northwick Avenue, Harrow, HA3 0AB
• Sold Oct 2016£845,000 | 5 Bed House112, Northwick Avenue, Harrow, HA3 0AT112, Northwick Avenue, Harrow, HA3 0AT
• Sold Oct 2015£770,000 | 5 Bed House45, Kenton Road, Harrow, HA3 0AH45, Kenton Road, Harrow, HA3 0AH
• Sold May 2015£550,000 | 5 Bed House52, Northwick Avenue, Harrow, HA3 0AB52, Northwick Avenue, Harrow, HA3 0AB
• Sold Jan 2008£800,000 | 5 Bed House20, Gerard Road, Harrow, HA1 2NE20, Gerard Road, Harrow, HA1 2NE

Our analysis of the public data ranks 12, Northwick Avenue, Harrow as the 13th largest and the 12th most expensive of the 162 addresses on Northwick Avenue, Harrow, HA3.

Against the HA3 postcode district average, it is £363k more expensive than the typical property.

• Saint Jerome Church of England Bilingual School

  1.0 km away
• Elmgrove Primary School & Nursery

  1.1 km away
• Harris Primary Academy South Kenton

  1.3 km away

• Harrow High School

  500 m away
• St Gregory's Catholic Science College

  1.2 km away
• Wembley High Technology College

  1.9 km away

• Northwick Park

  |

  200 m away
• Kenton

  |

  300 m away
• Harrow-on-the-Hill

  |

  1.0 km away

Environment Agency data suggests this area has a Very Low risk of flooding.