21, Borrowdale Avenue, Harrow occupies a 598 m² plot as recorded by HM Land Registry.

All 16 other houses in this postcode have recorded plot sizes, and this one ranks as the 2nd largest.

21, Borrowdale Avenue, Harrow has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 04 Apr 2024.

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

Land Registry records and our Estate Agent network show 234 sales of comparable properties within 470 metres of 21, Borrowdale Avenue, Harrow since 2021.

Most recently, 27, Pembroke Avenue, Harrow, HA3 8QG, a freehold house, sold at £550,000 on the 23rd January 2026.

Read more about house prices in HA3.

• Sold Jan 2026£550,000 | 3 Bed House27, Pembroke Avenue, Harrow, HA3 8QG27, Pembroke Avenue, Harrow, HA3 8QG
• Sold Dec 2025£550,000 | 3 Bed House40, Borrowdale Avenue, Harrow, HA3 7PZ40, Borrowdale Avenue, Harrow, HA3 7PZ
• Sold Oct 2025£585,000 | 3 Bed House222, Kenmore Avenue, Harrow, HA3 8PS222, Kenmore Avenue, Harrow, HA3 8PS
• Sold Aug 2025£510,000 | 3 Bed House483, Kenton Lane, Harrow, HA3 7JW483, Kenton Lane, Harrow, HA3 7JW
• Sold Jul 2025£575,000 | 3 Bed House134, Kingshill Drive, Harrow, HA3 8QS134, Kingshill Drive, Harrow, HA3 8QS
• Sold Jun 2025£460,000 | 3 Bed House13, Pembroke Avenue, Harrow, HA3 8QG13, Pembroke Avenue, Harrow, HA3 8QG
• Sold Apr 2025£533,200 | 3 Bed House48, Sancroft Road, Harrow, HA3 7NT48, Sancroft Road, Harrow, HA3 7NT
• Sold Apr 2025£662,500 | 3 Bed House30, Elgin Avenue, Harrow, HA3 8QL30, Elgin Avenue, Harrow, HA3 8QL
• Sold Mar 2025£423,000 | 3 Bed House212, Kenmore Avenue, Harrow, HA3 8PS212, Kenmore Avenue, Harrow, HA3 8PS
• Sold Jan 2025£550,000 | 3 Bed House14, Mountbel Road, Stanmore, HA7 2AF14, Mountbel Road, Stanmore, HA7 2AF
• Sold Nov 2024£544,500 | 3 Bed House29, Mountbel Road, Stanmore, HA7 2AG29, Mountbel Road, Stanmore, HA7 2AG
• Sold Oct 2024£527,000 | 3 Bed House76, Elgin Avenue, Harrow, HA3 8QJ76, Elgin Avenue, Harrow, HA3 8QJ
• Sold Oct 2024£525,000 | 3 Bed House229, Kenmore Avenue, Harrow, HA3 8PD229, Kenmore Avenue, Harrow, HA3 8PD
• Sold Sep 2024£545,000 | 3 Bed House68, Borrowdale Avenue, Harrow, HA3 7PZ68, Borrowdale Avenue, Harrow, HA3 7PZ
• Sold Sep 2024£530,000 | 3 Bed House29, Radcliffe Road, Harrow, HA3 7QA29, Radcliffe Road, Harrow, HA3 7QA
• Sold Aug 2023£609,000 | 3 Bed House8, Mountbel Road, Stanmore, HA7 2AF8, Mountbel Road, Stanmore, HA7 2AF
• Sold Feb 2023£597,000 | 3 Bed House146, Locket Road, Harrow, HA3 7NR146, Locket Road, Harrow, HA3 7NR
• Sold Sep 2022£685,000 | 3 Bed House235, Kenmore Avenue, Harrow, HA3 8PD235, Kenmore Avenue, Harrow, HA3 8PD
• Sold Mar 2022£555,000 | 3 Bed House142, Locket Road, Harrow, HA3 7NR142, Locket Road, Harrow, HA3 7NR
• Sold Aug 2021£550,000 | 3 Bed House233, Kenmore Avenue, Harrow, HA3 8PD233, Kenmore Avenue, Harrow, HA3 8PD

Our analysis of the public data ranks 21, Borrowdale Avenue, Harrow as the 58th largest and the 44th most expensive of the 67 addresses on Borrowdale Avenue, Harrow, HA3.

Against the HA3 postcode district average, it is £53k more expensive than the typical property.

• St Joseph's Catholic Primary School

  200 m away
• Belmont School

  300 m away
• Priestmead Primary School and Nursery

  700 m away

• The Sacred Heart Language College

  900 m away
• Salvatorian Roman Catholic College

  1.1 km away
• Park High School

  1.5 km away

• Harrow & Wealdstone

  |

  1.0 km away
• Kenton

  |

  1.9 km away

Environment Agency data suggests this area has a Very Low risk of flooding.