HM Land Registry records the plot of land for 35, Northwick Avenue, Harrow as measuring 547 m².

That makes it the 11th largest plot in the postcode, where 25 of the 27 other houses have recorded plot data.

35, Northwick Avenue, Harrow has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 28 Nov 2011.

The property is connected to mains gas and has mostly double glazing. It is heated using a boiler and radiators (mains gas).

The most recent sale of 35, Northwick Avenue, Harrow completed on 21st September 2012 at £487,000 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 45.0% over the period since September 2012.

• Sold Sep 2012£487,000

Since 2011 68 properties similar to 35, 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 Jun 2025£680,000 | 4 Bed House32, Hawthorne Avenue, Harrow, HA3 8AG32, 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 Sep 2024£662,075 | 4 Bed House46, Churchill Avenue, Harrow, HA3 0AY46, Churchill Avenue, Harrow, HA3 0AY
• Sold Sep 2023£665,000 | 4 Bed House1, Flambard Road, Harrow, HA1 2NB1, Flambard Road, Harrow, HA1 2NB
• 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 Jun 2022£710,000 | 4 Bed House106, Northwick Avenue, Harrow, HA3 0AT106, Northwick Avenue, Harrow, HA3 0AT
• 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 Jan 2021£600,000 | 4 Bed House3, Hawthorne Avenue, Harrow, HA3 8AG3, Hawthorne Avenue, Harrow, HA3 8AG
• 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 Sep 2017£561,000 | 4 Bed House16, Northwick Avenue, Harrow, HA3 0AB16, Northwick Avenue, Harrow, HA3 0AB
• Sold Feb 2017£676,000 | 4 Bed House16, Hawthorne Avenue, Harrow, HA3 8AG16, Hawthorne Avenue, Harrow, HA3 8AG
• Sold Jan 2016£685,000 | 4 Bed House27, Hawthorne Avenue, Harrow, HA3 8AG27, Hawthorne Avenue, Harrow, HA3 8AG
• Sold Oct 2012£385,000 | 4 Bed House6, Woodway Crescent, Harrow, HA1 2NQ6, Woodway Crescent, Harrow, HA1 2NQ
• Sold Oct 2011£475,000 | 4 Bed House29, Northwick Avenue, Harrow, HA3 0AA29, Northwick Avenue, Harrow, HA3 0AA

Of the 162 addresses on Northwick Avenue, Harrow, HA3, 35, Northwick Avenue, Harrow comes out as the 57th largest and the 43rd most expensive in our analysis of the public data.

It is also £175k 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.