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 2 15, Portman Square, Marble Arch, W1H 6LJ	07 Sep 2006	£180,000			Flat (Studio)
Flat 9 15, Portman Square, Marble Arch, W1H 6LJ	15 Jul 2005	£200,000			Flat
Flat 60 15, Portman Square, Marble Arch, W1H 6LJ	24 Jun 2005	£580,000	106 m² 1140 sqft	£5,471 £508	Flat (3 bed)
Flat 1 15, Portman Square, Marble Arch, W1H 6LJ	22 Mar 2005	£120,000			Flat (Studio)
Flat 20 15, Portman Square, Marble Arch, W1H 6LJ	17 Dec 2004	£555,000	91 m² 979 sqft	£6,098 £566	Flat (2 bed)
Flat 15 15, Portman Square, Marble Arch, W1H 6LJ	25 Nov 2004	£322,500	55 m² 592 sqft	£5,863 £544	Flat (1 bed)
Flat 61 15, Portman Square, Marble Arch, W1H 6LJ	25 Sep 2003	£535,000	105 m² 1130 sqft	£5,095 £473	Flat (4 bed)
Flat 51 15, Portman Square, Marble Arch, W1H 6LJ	16 Jun 2003	£950,000			Flat
Flat 43 15, Portman Square, Marble Arch, W1H 6LJ	11 Mar 2003	£542,500			Flat
Flat 17 15, Portman Square, Marble Arch, W1H 6LJ	30 Oct 2002	£320,000	103 m² 1108 sqft	£3,106 £288	Flat (2 bed)
Flat 32 15, Portman Square, Marble Arch, W1H 6LJ	20 Sep 2002	£500,000	82 m² 882 sqft	£6,097 £566	Flat (2 bed)
Flat 25 15, Portman Square, Marble Arch, W1H 6LJ	08 Aug 2002	£824,500			Flat (4 bed)
Flat 51 15, Portman Square, Marble Arch, W1H 6LJ	05 Jul 2002	£775,000			Flat
Flat 44 15, Portman Square, Marble Arch, W1H 6LJ	12 Apr 2001	£285,000			Flat
Flat 65 15, Portman Square, Marble Arch, W1H 6LJ	04 Mar 1998	£380,000	103 m² 1108 sqft	£3,689 £342	Flat (2 bed)
Flat 24 15, Portman Square, Marble Arch, W1H 6LJ	29 Jul 1997	£210,000			Flat (3 bed)
Flat 2 15, Portman Square	£180,000 Sep-2006
Flat 9 15, Portman Square	£200,000 Jul-2005
Flat 60 15, Portman Square	£580,000 Jun-2005	106 1140	5,471 508
Flat 1 15, Portman Square	£120,000 Mar-2005
Flat 20 15, Portman Square	£555,000 Dec-2004	91 979	6,098 566
Flat 15 15, Portman Square	£322,500 Nov-2004	55 592	5,863 544
Flat 61 15, Portman Square	£535,000 Sep-2003	105 1130	5,095 473
Flat 51 15, Portman Square	£950,000 Jun-2003
Flat 43 15, Portman Square	£542,500 Mar-2003
Flat 17 15, Portman Square	£320,000 Oct-2002	103 1108	3,106 288
Flat 32 15, Portman Square	£500,000 Sep-2002	82 882	6,097 566
Flat 25 15, Portman Square	£824,500 Aug-2002
Flat 51 15, Portman Square	£775,000 Jul-2002
Flat 44 15, Portman Square	£285,000 Apr-2001
Flat 65 15, Portman Square	£380,000 Mar-1998	103 1108	3,689 342
Flat 24 15, Portman Square	£210,000 Jul-1997

The data above for Portman 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 Portman Square, Marble Arch is £18,991 sqm (£1,764 per sq ft), this is calculated from the sold price of the 9 most recent sales.
There are about 127 homes on Portman Square, we would have expected roughly 18 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 9 property sales in Portman Square, averaging roughly 2 home sales per year .
The average size of all the properties on Portman Square is 103 m2 (1,108 sqft).