According to data from HM Land Registry, 20, Northwick Avenue, Harrow sits on a plot of 376 m².

We have plot size data on 33 out of 33 other houses in the postcode and 20, Northwick Avenue, Harrow sits on the 24th largest plot.

20, Northwick Avenue, Harrow has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 12 Mar 2019.

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

According to HM Land Registry, 20, Northwick Avenue, Harrow was last sold on 12th December 2016 for £600,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since December 2016, the market for similar properties has dropped by 0.7%.

• Sold Dec 2016£600,000

According to the Land Registry and our network of Estate Agents, there have been 20 sales of properties similar to 20, Northwick Avenue, Harrow within a radius of 590 metres since 2008.

The most recent example is 3, Flambard Road, Harrow, HA1 2NB, a freehold house which sold for £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 Sep 2023£850,000 | 5 Bed House9, Northwick Park Road, Harrow, HA1 2NY9, Northwick Park Road, Harrow, HA1 2NY
• 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 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 2015£680,000 | 5 Bed House22, Kenton Road, Harrow, HA1 2BW22, Kenton Road, Harrow, HA1 2BW
• Sold Mar 2014£810,000 | 5 Bed House6, Ashburnham Avenue, Harrow, HA1 2JQ6, Ashburnham Avenue, Harrow, HA1 2JQ
• Sold Sep 2013£465,000 | 5 Bed House98, Northwick Avenue, Harrow, HA3 0AT98, Northwick Avenue, Harrow, HA3 0AT
• Sold Aug 2012£1,130,000 | 5 Bed House30, Gerard Road, Harrow, HA1 2NE30, Gerard Road, Harrow, HA1 2NE
• Sold Oct 2008£600,000 | 5 Bed House12, Northwick Avenue, Harrow, HA3 0AB12, Northwick Avenue, Harrow, HA3 0AB
• Sold Jan 2008£800,000 | 5 Bed House20, Gerard Road, Harrow, HA1 2NE20, Gerard Road, Harrow, HA1 2NE

Northwick Avenue, Harrow, HA3 has a total of 162 addresses. According to our analysis of all the public data, 20, Northwick Avenue, Harrow is the 12th largest and the 11th most expensive property on the street.

When compared to the postcode district it is £380k more expensive than the average property in HA3.

• 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

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.