HM Land Registry records the plot of land for 37, Northwick Avenue, Harrow as measuring 434 m².

That makes it the 13th largest plot in the postcode, where 25 of the 27 other houses have recorded plot data.

37, Northwick Avenue, Harrow has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 25 Jun 2010.

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

The most recent sale of 37, Northwick Avenue, Harrow completed on 23rd September 2010 at £462,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 49.3% over the period since September 2010.

• Sold Sep 2010£462,000

Since 2011 52 properties similar to 37, Northwick Avenue, Harrow have sold within a radius of 570 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 18th August 2025, was 4, Hawthorne Avenue, Harrow, HA3 8AG, a freehold house which sold for £727,500.

Read more about house prices in HA3.

• Sold Aug 2025£727,500 | 4 Bed House4, Hawthorne Avenue, Harrow, HA3 8AG4, Hawthorne Avenue, Harrow, HA3 8AG
• Sold Mar 2025£770,000 | 4 Bed House6, Mayfield Avenue, Harrow, HA3 8EU6, Mayfield Avenue, Harrow, HA3 8EU
• Sold Feb 2025£670,000 | 4 Bed House23, Elmwood Avenue, Harrow, HA3 8AJ23, Elmwood Avenue, Harrow, HA3 8AJ
• Sold Jan 2025£655,000 | 4 Bed House39, Rushout Avenue, Harrow, HA3 0AS39, Rushout Avenue, Harrow, HA3 0AS
• Sold Sep 2024£662,075 | 4 Bed House46, Churchill Avenue, Harrow, HA3 0AY46, Churchill Avenue, Harrow, HA3 0AY
• Sold Jul 2023£750,000 | 4 Bed House14, Flambard Road, Harrow, HA1 2NA14, Flambard Road, Harrow, HA1 2NA
• Sold Jul 2023£742,000 | 4 Bed House58, Gayton Road, Harrow, HA1 2LS58, Gayton Road, Harrow, HA1 2LS
• Sold Oct 2022£815,000 | 4 Bed House11, Hawthorne Avenue, Harrow, HA3 8AG11, Hawthorne Avenue, Harrow, HA3 8AG
• Sold Aug 2022£700,000 | 4 Bed House88, Kenton Road, Harrow, HA3 8AE88, Kenton Road, Harrow, HA3 8AE
• Sold Feb 2022£656,000 | 4 Bed House1, Northwick Avenue, Harrow, HA3 0AA1, Northwick Avenue, Harrow, HA3 0AA
• Sold Apr 2021£680,000 | 4 Bed House26, Northwick Avenue, Harrow, HA3 0AB26, Northwick Avenue, Harrow, HA3 0AB
• Sold Nov 2020£755,000 | 4 Bed House57, Northwick Avenue, Harrow, HA3 0AU57, Northwick Avenue, Harrow, HA3 0AU
• Sold May 2019£622,000 | 4 Bed House34, Carlton Avenue, Harrow, HA3 8AY34, Carlton Avenue, Harrow, HA3 8AY
• Sold Feb 2017£676,000 | 4 Bed House16, Hawthorne Avenue, Harrow, HA3 8AG16, Hawthorne Avenue, Harrow, HA3 8AG
• Sold Feb 2016£617,200 | 4 Bed House24, Northwick Avenue, Harrow, HA3 0AB24, Northwick Avenue, Harrow, HA3 0AB
• Sold Jan 2016£685,000 | 4 Bed House27, Hawthorne Avenue, Harrow, HA3 8AG27, Hawthorne Avenue, Harrow, HA3 8AG
• Sold Apr 2013£485,000 | 4 Bed House20, Carlton Avenue, Harrow, HA3 8AY20, Carlton Avenue, Harrow, HA3 8AY
• Sold Sep 2012£487,000 | 4 Bed House35, Northwick Avenue, Harrow, HA3 0AA35, Northwick Avenue, Harrow, HA3 0AA
• Sold Oct 2011£475,000 | 4 Bed House29, Northwick Avenue, Harrow, HA3 0AA29, Northwick Avenue, Harrow, HA3 0AA
• Sold Feb 2011£420,000 | 4 Bed House44, Northwick Avenue, Harrow, HA3 0AB44, Northwick Avenue, Harrow, HA3 0AB

Of the 162 addresses on Northwick Avenue, Harrow, HA3, 37, Northwick Avenue, Harrow comes out as the 46th largest and the 54th most expensive in our analysis of the public data.

It is also £127k more expensive than the average property across the HA3 district.

• Saint Jerome Church of England Bilingual School

  1.1 km away
• Elmgrove Primary School & Nursery

  1.1 km away
• Mount Stewart Infant School

  1.3 km away

• Harrow High School

  500 m away
• St Gregory's Catholic Science College

  1.2 km away
• Claremont High School

  1.9 km away

• Northwick Park

  |

  100 m away
• Kenton

  |

  300 m away
• Harrow-on-the-Hill

  |

  1.1 km away

The flood risk here is rated Very Low, based on Environment Agency data.