18, Flask Walk occupies a 80 m² plot as recorded by HM Land Registry.

Of the 19 other houses in this postcode, 10 have recorded plot sizes, and this one ranks as the 9th largest.

18, Flask Walk has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 08 Oct 2020.

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

18, Flask Walk last changed hands on 18th January 2011, selling for £1,495,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 4 times since 1995.

The market for similar properties has risen by 43.6% since January 2011.

• Sold Jan 2011£1,495,000
• Sold Mar 2004£835,000
• Sold Jul 2000£665,000

Land Registry records and our Estate Agent network show 40 sales of comparable properties within 300 metres of 18, Flask Walk since 2013.

Most recently, 33, Willoughby Road, London, NW3 1RT, a freehold house, sold at £2,750,000 on the 27th March 2026.

Read more about house prices in NW3.

• Sold Mar 2026£2,750,000 | 4 Bed House33, Willoughby Road, London, NW3 1RT33, Willoughby Road, London, NW3 1RT
• Sold Dec 2025£2,185,000 | 4 Bed House17, The Mount, London, NW3 6SZ17, The Mount, London, NW3 6SZ
• Sold Nov 2025£1,500,000 | 4 Bed HouseSide Door, 16, Flask Walk, London, NW3 1HESide Door, 16, Flask Walk, London, NW3 1HE
• Sold May 2023£1,810,000 | 4 Bed House2, Well Road, London, NW3 1LJ2, Well Road, London, NW3 1LJ
• Sold Mar 2023£2,300,000 | 3 Bed House19, Holly Walk, London, NW3 6RA19, Holly Walk, London, NW3 6RA
• Sold Oct 2022£1,900,000 | 3 Bed House22, Flask Walk, London, NW3 1HE22, Flask Walk, London, NW3 1HE
• Sold Aug 2022£2,550,000 | 4 Bed House61, New End, London, NW3 1HY61, New End, London, NW3 1HY
• Sold Jul 2022£2,600,000 | 4 Bed House14, The Mount, London, NW3 6SZ14, The Mount, London, NW3 6SZ
• Sold Jun 2022£1,830,000 | 4 Bed House39, Flask Walk, London, NW3 1HH39, Flask Walk, London, NW3 1HH
• Sold Sep 2021£2,500,000 | 4 Bed House35, Flask Walk, London, NW3 1HH35, Flask Walk, London, NW3 1HH
• Sold Apr 2021£2,000,000 | 4 Bed House55A, Gayton Road, London, NW3 1TU55A, Gayton Road, London, NW3 1TU
• Sold Feb 2021£2,525,000 | 4 Bed House30, Grove Place, London, NW3 1JR30, Grove Place, London, NW3 1JR
• Sold Oct 2020£2,400,000 | 4 Bed House2, The Mount, London, NW3 6SZ2, The Mount, London, NW3 6SZ
• Sold Sep 2020£1,640,000 | 3 Bed House14, Back Lane, London, NW3 1HL14, Back Lane, London, NW3 1HL
• Sold Mar 2020£2,250,000 | 4 Bed House35, Spencer Walk, London, NW3 1QZ35, Spencer Walk, London, NW3 1QZ
• Sold Feb 2020£1,300,000 | 4 Bed House8, Benhams Place, London, NW3 6QX8, Benhams Place, London, NW3 6QX
• Sold Jun 2018£2,850,000 | 4 Bed House5, Back Lane, London, NW3 1HL5, Back Lane, London, NW3 1HL
• Sold Jul 2015£2,025,000 | 4 Bed House38, New End Square, London, NW3 1LS38, New End Square, London, NW3 1LS
• Sold Aug 2013£1,450,000 | 4 Bed House2, Trinity Close, London, NW3 1SD2, Trinity Close, London, NW3 1SD
• Sold Feb 2013£1,995,000 | 4 Bed House12, Gardnor Road, London, NW3 1HA12, Gardnor Road, London, NW3 1HA

Our analysis of the public data ranks 18, Flask Walk as the 30th largest and the 15th most expensive of the 81 addresses on Flask Walk, London, NW3.

Against the NW3 postcode district average, it is £926k more expensive than the typical property.

• New End Primary School

  100 m away
• Hampstead Parochial Church of England Primary School

  200 m away
• Christ Church Primary School, Hampstead

  300 m away

• The UCL Academy

  1.7 km away
• William Ellis School

  1.8 km away
• Parliament Hill School

  1.9 km away

• Hampstead

  |

  100 m away
• Hampstead Heath

  |

  800 m away
• Finchley Road & Frognal

  |

  800 m away

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