3, Blackwell Close, Harrow occupies a 128 m² plot as recorded by HM Land Registry.

All 9 other houses in this postcode have recorded plot sizes, and this one ranks as the 5th largest.

3, Blackwell Close, Harrow has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 30 Oct 2020.

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

3, Blackwell Close, Harrow last changed hands on 7th July 2006, selling for £268,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold twice since 1995.

• Sold Jul 2006£268,000
• Sold Feb 2003£235,000

Land Registry records and our Estate Agent network show 82 sales of comparable properties within 510 metres of 3, Blackwell Close, Harrow since 2007.

Most recently, 10, Hutton Gardens, Harrow, HA3 6RA, a freehold house, sold at £438,000 on the 19th December 2025.

Read more about house prices in HA3.

• Sold Dec 2025£438,000 | 3 Bed House10, Hutton Gardens, Harrow, HA3 6RA10, Hutton Gardens, Harrow, HA3 6RA
• Sold Aug 2025£565,000 | 3 Bed House72, Weighton Road, Harrow, HA3 6HZ72, Weighton Road, Harrow, HA3 6HZ
• Sold Apr 2025£600,000 | 3 Bed House1, Stox Mead, Harrow, HA3 5JX1, Stox Mead, Harrow, HA3 5JX
• Sold Sep 2024£480,000 | 3 Bed House84, Boxtree Lane, Harrow, HA3 6JB84, Boxtree Lane, Harrow, HA3 6JB
• Sold Aug 2024£510,000 | 3 Bed House17, Elm Terrace, Harrow, HA3 6HW17, Elm Terrace, Harrow, HA3 6HW
• Sold May 2024£577,000 | 4 Bed House6, Lorraine Park, Harrow, HA3 6BX6, Lorraine Park, Harrow, HA3 6BX
• Sold Jan 2024£477,000 | 3 Bed House2, Blackwell Close, Harrow, HA3 6JY2, Blackwell Close, Harrow, HA3 6JY
• Sold Oct 2022£550,000 | 3 Bed House9, Belsize Road, Harrow, HA3 6JL9, Belsize Road, Harrow, HA3 6JL
• Sold Oct 2022£600,000 | 3 Bed House66, Weighton Road, Harrow, HA3 6HZ66, Weighton Road, Harrow, HA3 6HZ
• Sold Jul 2022£550,000 | 4 Bed House13, College Road, Harrow, HA3 6EF13, College Road, Harrow, HA3 6EF
• Sold Apr 2022£577,000 | 3 Bed House20, Weighton Road, Harrow, HA3 6HZ20, Weighton Road, Harrow, HA3 6HZ
• Sold Feb 2022£555,000 | 4 Bed House11, Lorraine Park, Harrow, HA3 6BX11, Lorraine Park, Harrow, HA3 6BX
• Sold Sep 2021£515,000 | 3 Bed House58, Weighton Road, Harrow, HA3 6HZ58, Weighton Road, Harrow, HA3 6HZ
• Sold May 2021£550,000 | 4 Bed House17, Mepham Gardens, Harrow, HA3 6QS17, Mepham Gardens, Harrow, HA3 6QS
• Sold Dec 2020£541,000 | 3 Bed House38, Weighton Road, Harrow, HA3 6HZ38, Weighton Road, Harrow, HA3 6HZ
• Sold Aug 2019£415,000 | 3 Bed House4, Blackwell Close, Harrow, HA3 6JY4, Blackwell Close, Harrow, HA3 6JY
• Sold Mar 2018£510,000 | 4 Bed House12, Elm Terrace, Harrow, HA3 6HW12, Elm Terrace, Harrow, HA3 6HW
• Sold Mar 2018£413,000 | 4 Bed House24, Hutton Lane, Harrow, HA3 6RD24, Hutton Lane, Harrow, HA3 6RD
• Sold Aug 2012£335,000 | 3 Bed House1, Colmer Place, Harrow, HA3 6JW1, Colmer Place, Harrow, HA3 6JW
• Sold Jun 2007£305,000 | 4 Bed House5, Blackwell Close, Harrow, HA3 6JY5, Blackwell Close, Harrow, HA3 6JY

Our analysis of the public data ranks 3, Blackwell Close, Harrow as the 7th largest and the 7th most expensive of the 40 addresses on Blackwell Close, Harrow, HA3.

Against the HA3 postcode district average, it is £6k less expensive than the typical property.

• Cedars Manor School

  500 m away
• St Teresa's Catholic Primary School and Nursery

  800 m away
• Hujjat Primary School

  800 m away

• Hatch End High School

  800 m away
• Salvatorian Roman Catholic College

  800 m away
• The Sacred Heart Language College

  1.0 km away

• Headstone Lane

  |

  1.0 km away
• Hatch End

  |

  1.7 km away
• Harrow & Wealdstone

  |

  1.8 km away

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