Sort by Most recent sale Address Highest price Highest £ per sqm Largest area Smallest area	Last sold	Price paid	Floor area (m²) Floor area (sq ft)	£ per m² £ per sq ft	Type	Sold	m² sq ft	£/m² £/sq ft
Flat 10 81, Onslow Square, South Kensington, SW7 3LT -	15 Aug 2025	£2,500,000	143 m² 1539 sqft	£17,482 £1,624	Flat (2 bed)
Flat 6 89, Onslow Square, South Kensington, SW7 3LT	03 Oct 2023	£2,600,000	114 m² 1227 sqft	£22,807 £2,118	Flat (2 bed)
Flat 4 81, Onslow Square, South Kensington, SW7 3LT -	29 Jun 2021	£3,325,000	134 m² 1442 sqft	£24,813 £2,305	Flat (2 bed)
Flat 4 89, Onslow Square, South Kensington, SW7 3LT	29 Jan 2021	£2,450,000	106 m² 1140 sqft	£23,113 £2,147	Flat (3 bed)
Flat 1 81, Onslow Square, South Kensington, SW7 3LT -	05 Sep 2017	£632,000	108 m² 1162 sqft	£5,851 £543	Flat (2 bed)
Flat 2 89, Onslow Square, South Kensington, SW7 3LT -	10 Mar 2017	£2,500,000	106 m² 1140 sqft	£23,584 £2,191	Flat (2 bed)
Flat 7 81, Onslow Square, South Kensington, SW7 3LT -	24 Apr 2015	£4,250,000	176 m² 1894 sqft	£24,147 £2,243	Flat (2 bed)
Flat 6 81, Onslow Square, South Kensington, SW7 3LT -	15 Dec 2014	£3,950,000	134 m² 1442 sqft	£29,477 £2,738	Flat (3 bed)
Flat 7 89, Onslow Square, South Kensington, SW7 3LT	25 Mar 2013	£1,850,000	101 m² 1087 sqft	£18,316 £1,701	Flat (2 bed)
Flat 3 89, Onslow Square, South Kensington, SW7 3LT -	07 Jan 2011	£2,250,000	123 m² 1323 sqft	£18,292 £1,699	Flat (2 bed)
Flat 5 89, Onslow Square, South Kensington, SW7 3LT	19 Mar 2007	£1,685,000			Flat (1 bed)
Flat 5 81, Onslow Square, South Kensington, SW7 3LT -	30 Jun 2006	£2,200,000	176 m² 1894 sqft	£12,500 £1,161	Flat (3 bed)
Flat 8 81, Onslow Square, South Kensington, SW7 3LT	29 Apr 2004	£1,100,000			Flat (3 bed)
Flat 8 89, Onslow Square, South Kensington, SW7 3LT	31 Dec 2003	£1,100,000			Flat (2 bed)
Flat 9 77 - 85, Onslow Square, South Kensington, SW7 3LT	31 Mar 2003	£1,175,000			Flat
Flat 9 77 - 85, Onslow Square, South Kensington, SW7 3LT	03 Mar 2000	£650,000			Flat
Flat 3 81, Onslow Square, South Kensington, SW7 3LT	01 May 1997	£971,080			Flat (3 bed)
Flat 10 81, Onslow Square -	£2,500,000 Aug-2025	143 1539	17,482 1,624
Flat 6 89, Onslow Square	£2,600,000 Oct-2023	114 1227	22,807 2,118
Flat 4 81, Onslow Square -	£3,325,000 Jun-2021	134 1442	24,813 2,305
Flat 4 89, Onslow Square	£2,450,000 Jan-2021	106 1140	23,113 2,147
Flat 1 81, Onslow Square -	£632,000 Sep-2017	108 1162	5,851 543
Flat 2 89, Onslow Square -	£2,500,000 Mar-2017	106 1140	23,584 2,191
Flat 7 81, Onslow Square -	£4,250,000 Apr-2015	176 1894	24,147 2,243
Flat 6 81, Onslow Square -	£3,950,000 Dec-2014	134 1442	29,477 2,738
Flat 7 89, Onslow Square	£1,850,000 Mar-2013	101 1087	18,316 1,701
Flat 3 89, Onslow Square -	£2,250,000 Jan-2011	123 1323	18,292 1,699
Flat 5 89, Onslow Square	£1,685,000 Mar-2007
Flat 5 81, Onslow Square -	£2,200,000 Jun-2006	176 1894	12,500 1,161
Flat 8 81, Onslow Square	£1,100,000 Apr-2004
Flat 8 89, Onslow Square	£1,100,000 Dec-2003
Flat 9 77 - 85, Onslow Square	£1,175,000 Mar-2003
Flat 9 77 - 85, Onslow Square	£650,000 Mar-2000
Flat 3 81, Onslow Square	£971,080 May-1997

The data above for Onslow Square can be visualised as a scatter graph, this will show price trends over time.

The average price per square metre (per square foot) in Onslow Square, South Kensington is £22,452 sqm (£2,085 per sq ft), this is calculated from the Land Registry sold price of the 6 most recent sales.
The majority of homes in South Kensington are now selling for between £14,320 and £20,830 per square metre (£1,330 and £1,935 per square foot) , find out more in this local analysis of SW7 3 (South Kensington) house prices.
There are roughly 60 homes on Onslow Square, we would have expected roughly 8 sales each year given that in the UK people sell their homes on average once every 7 years.
In the last 4 years there have been 6 property sales in Onslow Square, averaging roughly 1 home sales per year .
The average size of all the properties on Onslow Square is 149 m2 (1,603 sqft).