21, Harlequin Close, Isleworth occupies a 209 m² plot as recorded by HM Land Registry.

Of the 33 other houses in this postcode, 17 have recorded plot sizes, and this one ranks as the 2nd largest.

21, Harlequin Close, Isleworth has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 13 Oct 2025.

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

21, Harlequin Close, Isleworth last changed hands on 15th May 2026, selling for £525,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 5.0% since May 2026.

• Sold May 2026£525,000

Land Registry records and our Estate Agent network show 192 sales of comparable properties within 640 metres of 21, Harlequin Close, Isleworth since 2014.

Most recently, 47, Arnold Crescent, Isleworth, TW7 7NS, a freehold house, sold at £760,000 on the 29th January 2026.

Read more about house prices in TW7.

• Sold Jan 2026£760,000 | 3 Bed House47, Arnold Crescent, Isleworth, TW7 7NS47, Arnold Crescent, Isleworth, TW7 7NS
• Sold Jan 2026£572,500 | 3 Bed House72, Arnold Crescent, Isleworth, TW7 7NU72, Arnold Crescent, Isleworth, TW7 7NU
• Sold Aug 2025£515,000 | 3 Bed House5, Queensbridge Park, Isleworth, TW7 7LY5, Queensbridge Park, Isleworth, TW7 7LY
• Sold Mar 2025£495,000 | 3 Bed House2, Harlequin Close, Isleworth, TW7 7LA2, Harlequin Close, Isleworth, TW7 7LA
• Sold Apr 2024£450,000 | 3 Bed House7, Regency Mews, Isleworth, TW7 7LX7, Regency Mews, Isleworth, TW7 7LX
• Sold Jan 2024£525,000 | 3 Bed House18, Crofters Close, Isleworth, TW7 7PH18, Crofters Close, Isleworth, TW7 7PH
• Sold Feb 2023£525,000 | 3 Bed House2, Yeomans Mews, Isleworth, TW7 7LZ2, Yeomans Mews, Isleworth, TW7 7LZ
• Sold Jul 2022£435,000 | 3 Bed House8, Regency Mews, Isleworth, TW7 7LX8, Regency Mews, Isleworth, TW7 7LX
• Sold Sep 2021£425,000 | 3 Bed House230, Whitton Dene, Isleworth, TW7 7LU230, Whitton Dene, Isleworth, TW7 7LU
• Sold Aug 2021£480,000 | 3 Bed House18, Harlequin Close, Isleworth, TW7 7LA18, Harlequin Close, Isleworth, TW7 7LA
• Sold Jun 2021£450,000 | 3 Bed House25, Harlequin Close, Isleworth, TW7 7LA25, Harlequin Close, Isleworth, TW7 7LA
• Sold Jun 2021£495,000 | 3 Bed House17, Regency Mews, Isleworth, TW7 7LX17, Regency Mews, Isleworth, TW7 7LX
• Sold Jan 2021£499,999 | 3 Bed House204, Whitton Dene, Isleworth, TW7 7LU204, Whitton Dene, Isleworth, TW7 7LU
• Sold Jun 2019£430,000 | 3 Bed House30, Harlequin Close, Isleworth, TW7 7LA30, Harlequin Close, Isleworth, TW7 7LA
• Sold Feb 2019£410,000 | 3 Bed House8, Harlequin Close, Isleworth, TW7 7LA8, Harlequin Close, Isleworth, TW7 7LA
• Sold May 2018£390,000 | 3 Bed House8, Yeomans Mews, Isleworth, TW7 7LZ8, Yeomans Mews, Isleworth, TW7 7LZ
• Sold Mar 2018£470,000 | 3 Bed House10, Queensbridge Park, Isleworth, TW7 7LY10, Queensbridge Park, Isleworth, TW7 7LY
• Sold Oct 2016£400,000 | 3 Bed House13, Harlequin Close, Isleworth, TW7 7LA13, Harlequin Close, Isleworth, TW7 7LA
• Sold May 2016£440,000 | 3 Bed House260, Whitton Dene, Isleworth, TW7 7LU260, Whitton Dene, Isleworth, TW7 7LU
• Sold Jan 2014£355,000 | 3 Bed House258, Whitton Dene, Isleworth, TW7 7LU258, Whitton Dene, Isleworth, TW7 7LU

Our analysis of the public data ranks 21, Harlequin Close, Isleworth as the 13th largest and the 9th most expensive of the 33 addresses on Harlequin Close, Isleworth, TW7.

Against the TW7 postcode district average, it is £2k more expensive than the typical property.

• Chase Bridge Primary School

  500 m away
• Ivybridge Primary School

  800 m away
• Chatsworth Primary School

  1.0 km away

• The Richmond upon Thames School

  800 m away
• St Richard Reynolds Catholic High School

  1.4 km away
• Gumley House RC Convent School, FCJ

  1.5 km away

• Hounslow

  |

  1.3 km away
• Twickenham

  |

  1.4 km away
• Whitton (London)

  |

  1.4 km away

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