According to data from HM Land Registry, 46, Northwick Avenue, Harrow sits on a plot of 391 m².

We have plot size data on 33 out of 33 other houses in the postcode and 46, Northwick Avenue, Harrow sits on the 18th largest plot.

46, Northwick Avenue, Harrow has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 08 Dec 2025.

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 HM Land Registry, 46, Northwick Avenue, Harrow was last sold on 31st January 2000 for £241,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

• Sold Jan 2000£241,000

According to the Land Registry and our network of Estate Agents, there have been 43 sales of properties similar to 46, Northwick Avenue, Harrow within a radius of 590 metres since 2010.

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 Sep 2024£840,000 | 5 Bed House36, Northwick Avenue, Harrow, HA3 0AB36, Northwick Avenue, Harrow, HA3 0AB
• Sold Aug 2024£900,000 | 5 Bed House51, Draycott Avenue, Harrow, HA3 0BL51, Draycott Avenue, Harrow, HA3 0BL
• Sold Jul 2024£1,000,000 | 5 Bed House20, Manor Road, Harrow, HA1 2PB20, Manor Road, Harrow, HA1 2PB
• Sold Mar 2024£880,000 | 5 Bed House16, Woodway Crescent, Harrow, HA1 2NQ16, Woodway Crescent, Harrow, HA1 2NQ
• Sold Mar 2024£725,000 | 4 Bed House32, Gerard Road, Harrow, HA1 2NE32, Gerard Road, Harrow, HA1 2NE
• Sold Feb 2024£900,000 | 5 Bed House98, Draycott Avenue, Harrow, HA3 0BY98, Draycott Avenue, Harrow, HA3 0BY
• Sold Sep 2023£760,000 | 5 Bed House27, Flambard Road, Harrow, HA1 2NB27, Flambard Road, Harrow, HA1 2NB
• Sold Nov 2022£665,000 | 4 Bed House30, Carlton Avenue, Harrow, HA3 8AY30, Carlton Avenue, Harrow, HA3 8AY
• Sold Jun 2022£700,000 | 5 Bed House32, Carlton Avenue, Harrow, HA3 8AY32, Carlton Avenue, Harrow, HA3 8AY
• Sold Aug 2021£900,000 | 5 Bed House63, Gayton Road, Harrow, HA1 2LU63, Gayton Road, Harrow, HA1 2LU
• Sold Aug 2021£853,500 | 4 Bed House23, Hawthorne Avenue, Harrow, HA3 8AG23, Hawthorne Avenue, Harrow, HA3 8AG
• Sold Feb 2021£695,000 | 5 Bed House13, Northwick Avenue, Harrow, HA3 0AA13, Northwick Avenue, Harrow, HA3 0AA
• Sold Jan 2021£752,000 | 5 Bed House5, Rushout Avenue, Harrow, HA3 0AS5, Rushout Avenue, Harrow, HA3 0AS
• Sold Nov 2017£780,000 | 5 Bed House20, Mayfield Avenue, Harrow, HA3 8EU20, Mayfield Avenue, Harrow, HA3 8EU
• Sold Oct 2017£780,000 | 5 Bed House61, Gayton Road, Harrow, HA1 2LU61, Gayton Road, Harrow, HA1 2LU
• Sold Oct 2015£770,000 | 5 Bed House45, Kenton Road, Harrow, HA3 0AH45, Kenton Road, Harrow, HA3 0AH
• Sold Apr 2015£775,000 | 5 Bed House10, Rushout Avenue, Harrow, HA3 0AR10, Rushout Avenue, Harrow, HA3 0AR
• Sold Sep 2013£456,000 | 5 Bed House8, Northwick Avenue, Harrow, HA3 0AB8, Northwick Avenue, Harrow, HA3 0AB
• Sold Mar 2010£346,000 | 5 Bed House20, Woodway Crescent, Harrow, HA1 2NQ20, Woodway Crescent, Harrow, HA1 2NQ

Northwick Avenue, Harrow, HA3 has a total of 162 addresses. According to our analysis of all the public data, 46, Northwick Avenue, Harrow is the 19th largest and the 20th most expensive property on the street.

When compared to the postcode district it is £290k 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.