According to data from HM Land Registry, 49, Northwick Avenue, Harrow sits on a plot of 378 m².

We have plot size data on 25 out of 27 other houses in the postcode and 49, Northwick Avenue, Harrow sits on the 19th largest plot.

49, Northwick Avenue, Harrow has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 28 May 2026.

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

According to the Land Registry and our network of Estate Agents, there have been 54 sales of properties similar to 49, Northwick Avenue, Harrow within a radius of 570 metres since 2010.

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

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 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 Aug 2015£625,000 | 4 Bed House23, Rushout Avenue, Harrow, HA3 0AS23, Rushout Avenue, Harrow, HA3 0AS
• Sold May 2014£566,000 | 4 Bed House100, Northwick Avenue, Harrow, HA3 0AT100, Northwick Avenue, Harrow, HA3 0AT
• Sold Apr 2013£485,000 | 4 Bed House20, Carlton Avenue, Harrow, HA3 8AY20, Carlton Avenue, Harrow, HA3 8AY
• Sold Feb 2011£420,000 | 4 Bed House44, Northwick Avenue, Harrow, HA3 0AB44, Northwick Avenue, Harrow, HA3 0AB
• Sold Sep 2010£462,000 | 4 Bed House37, Northwick Avenue, Harrow, HA3 0AA37, Northwick Avenue, Harrow, HA3 0AA

Northwick Avenue, Harrow, HA3 has a total of 162 addresses. According to our analysis of all the public data, 49, Northwick Avenue, Harrow is the 44th largest and the 50th most expensive property on the street.

When compared to the postcode district it is £130k more expensive than the average property in HA3.

• 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

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