21, Windmill Hill occupies a 370 m² plot as recorded by HM Land Registry.

21, Windmill Hill last changed hands on 21st January 2010, selling for £2,575,000. 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 34.4% since January 2010.

• Sold Jan 2010£2,575,000

Land Registry records and our Estate Agent network show 20 sales of comparable properties within 470 metres of 21, Windmill Hill since 2007.

Most recently, 29, Gayton Road, London, NW3 1TY, a freehold house, sold at £4,275,000 on the 7th August 2025.

Read more about house prices in NW3.

• Sold Aug 2025£4,275,000 | 5 Bed House29, Gayton Road, London, NW3 1TY29, Gayton Road, London, NW3 1TY
• Sold May 2025£4,425,000 | 5 Bed House28, Gayton Road, London, NW3 1TY28, Gayton Road, London, NW3 1TY
• Sold Aug 2024£4,250,000 | 5 Bed House4, Windmill Hill, London, NW3 6RU4, Windmill Hill, London, NW3 6RU
• Sold May 2024£3,825,000 | 5 Bed House18A, Frognal Gardens, London, NW3 6XA18A, Frognal Gardens, London, NW3 6XA
• Sold May 2024£4,200,000 | 5 Bed House20, Church Row, London, NW3 6UP20, Church Row, London, NW3 6UP
• Sold May 2023£6,400,000 | 5 Bed House26, Church Row, London, NW3 6UP26, Church Row, London, NW3 6UP
• Sold Jul 2022£4,350,000 | 5 Bed House6, Holly Place, London, NW3 6QU6, Holly Place, London, NW3 6QU
• Sold Mar 2022£3,900,000 | 5 Bed House102, Frognal, London, NW3 6XU102, Frognal, London, NW3 6XU
• Sold Jan 2022£3,625,000 | 5 Bed House4, Birchwood Drive, London, NW3 7NB4, Birchwood Drive, London, NW3 7NB
• Sold Nov 2021£4,900,000 | 5 Bed House16, Holly Mount, London, NW3 6SG16, Holly Mount, London, NW3 6SG
• Sold Mar 2020£7,350,000 | 5 Bed House18, Frognal Gardens, London, NW3 6XA18, Frognal Gardens, London, NW3 6XA
• Sold Oct 2019£4,000,000 | 5 Bed House34, Christchurch Hill, London, NW3 1JL34, Christchurch Hill, London, NW3 1JL
• Sold Apr 2016£5,500,000 | 5 Bed House24, Church Row, London, NW3 6UP24, Church Row, London, NW3 6UP
• Sold Nov 2015£3,405,000 | 5 Bed House17, East Heath Road, London, NW3 1AL17, East Heath Road, London, NW3 1AL
• Sold Jun 2014£6,400,000 | 6 Bed House21, Church Row, London, NW3 6UP21, Church Row, London, NW3 6UP
• Sold Jun 2013£3,250,000 | 5 Bed House15, Gayton Road, London, NW3 1TX15, Gayton Road, London, NW3 1TX
• Sold Feb 2012£3,675,000 | 6 Bed House22C, East Heath Road, London, NW3 1AJ22C, East Heath Road, London, NW3 1AJ
• Sold Jan 2011£2,625,000 | 5 Bed House2, Mansfield Place, London, NW3 1HS2, Mansfield Place, London, NW3 1HS
• Sold Aug 2008£2,975,000 | 5 Bed House1, Birchwood Drive, London, NW3 7NB1, Birchwood Drive, London, NW3 7NB
• Sold Mar 2007£1,595,000 | 5 Bed House30, Christchurch Hill, London, NW3 1JL30, Christchurch Hill, London, NW3 1JL

Our analysis of the public data ranks 21, Windmill Hill as the 15th largest and the 14th most expensive of the 27 addresses on Windmill Hill, London, NW3.

Against the NW3 postcode district average, it is £2.832m more expensive than the typical property.

• New End Primary School

  300 m away
• Christ Church Primary School, Hampstead

  300 m away
• Hampstead Parochial Church of England Primary School

  300 m away

• Hampstead School

  1.8 km away
• The UCL Academy

  2.1 km away
• William Ellis School

  2.1 km away

• Hampstead

  |

  300 m away
• Finchley Road & Frognal

  |

  1.0 km away
• Hampstead Heath

  |

  1.1 km away

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