According to data from HM Land Registry, 21, Markham Square sits on a plot of 95 m².

We have plot size data on 18 out of 18 other houses in the postcode and 21, Markham Square sits on the 18th largest plot.

21, Markham Square has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 24 Feb 2021.

The property is connected to mains gas and has partial double glazing. It is heated using a boiler and radiators (mains gas, air source heat pump, underfloor, electric).

According to HM Land Registry, 21, Markham Square was last sold on 4th July 2023 for £5,750,000 and was recorded as a freehold house.

The property has had 2 sales since 1995.

Since July 2023, the market for similar properties has dropped by 0.8%.

• Sold Jul 2023£5,750,000
• Sold Dec 2003£2,145,000

According to the Land Registry and our network of Estate Agents, there have been 34 sales of properties similar to 21, Markham Square within a radius of 240 metres since 2007.

The most recent example is 47, Markham Square, London, SW3 4XA, a freehold house which sold for £5,100,000 on the 18th July 2025.

Read more about house prices in SW3.

• Sold Jul 2025£5,100,000 | 5 Bed House47, Markham Square, London, SW3 4XA47, Markham Square, London, SW3 4XA
• Sold Jun 2025£4,550,000 | 5 Bed House8, Markham Square, London, SW3 4UY8, Markham Square, London, SW3 4UY
• Sold May 2025£5,650,000 | 5 Bed House15, Astell Street, London, SW3 3RT15, Astell Street, London, SW3 3RT
• Sold Nov 2023£6,280,000 | 5 Bed House36, Burnsall Street, London, SW3 3SP36, Burnsall Street, London, SW3 3SP
• Sold Jun 2023£6,950,000 | 5 Bed House5, Wellington Square, London, SW3 4NJ5, Wellington Square, London, SW3 4NJ
• Sold Dec 2022£6,850,000 | 5 Bed House4, Wellington Square, London, SW3 4NJ4, Wellington Square, London, SW3 4NJ
• Sold Jun 2022£5,750,000 | 5 Bed House2, Wellington Square, London, SW3 4NJ2, Wellington Square, London, SW3 4NJ
• Sold May 2022£4,700,000 | 4 Bed House33, Wellington Square, London, SW3 4NR33, Wellington Square, London, SW3 4NR
• Sold Aug 2021£5,800,000 | 5 Bed House6, Wellington Square, London, SW3 4NJ6, Wellington Square, London, SW3 4NJ
• Sold Mar 2021£5,200,000 | 5 Bed House32, Markham Square, London, SW3 4XA32, Markham Square, London, SW3 4XA
• Sold Dec 2020£4,350,000 | 5 Bed House2, Royal Avenue, London, SW3 4QF2, Royal Avenue, London, SW3 4QF
• Sold May 2020£5,650,000 | 5 Bed House24, Wellington Square, London, SW3 4NR24, Wellington Square, London, SW3 4NR
• Sold Mar 2020£5,700,000 | 4 Bed House33, Markham Square, London, SW3 4XA33, Markham Square, London, SW3 4XA
• Sold Feb 2020£5,000,000 | 5 Bed House35, Wellington Square, London, SW3 4NR35, Wellington Square, London, SW3 4NR
• Sold Oct 2019£6,500,000 | 5 Bed House8, Royal Avenue, London, SW3 4QF8, Royal Avenue, London, SW3 4QF
• Sold Dec 2018£5,700,000 | 5 Bed House7, Markham Square, London, SW3 4UY7, Markham Square, London, SW3 4UY
• Sold Sep 2018£6,525,000 | 5 Bed House41, Markham Square, London, SW3 4XA41, Markham Square, London, SW3 4XA
• Sold May 2013£6,000,000 | 5 Bed House34, Markham Square, London, SW3 4XA34, Markham Square, London, SW3 4XA
• Sold Jun 2008£3,825,000 | 5 Bed House43, Markham Square, London, SW3 4XA43, Markham Square, London, SW3 4XA
• Sold Sep 2007£4,651,000 | 5 Bed House35, Markham Square, London, SW3 4XA35, Markham Square, London, SW3 4XA

Markham Square, London, SW3 has a total of 62 addresses. According to our analysis of all the public data, 21, Markham Square is the 22nd largest and the 18th most expensive property on the street.

When compared to the postcode district it is £3.681m more expensive than the average property in SW3.

• Marlborough Primary School

  300 m away
• Oratory Roman Catholic Primary School

  400 m away
• St Joseph's Catholic Primary School

  400 m away

• St. Thomas More Language College

  400 m away
• Saint John Bosco College

  1.7 km away
• Chelsea Academy

  1.8 km away

• Sloane Square

  |

  600 m away
• South Kensington

  |

  800 m away
• Knightsbridge

  |

  1.1 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.