Our Data Sources
Flat 65, 15, Portman Square has no recent1 records in the the Land Registry and a single entry in the EPC database dated July 2013.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 4 out of 5 and is considered of high accuracy.
Price Range & Condition
The condition of a property plays an important role in determining its value, with the degree of impact varying by property type, size and location.
For Flat 65, 15, Portman Square, we estimate a market value of £2,198,626 and a rental value of £7,920 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £1,947,355 and £7,015 per month respectively.
Energy Efficiency
Flat 65, 15, Portman Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 15 Jul 2013.
The property is not connected to mains gas and has single glazed windows. It is heated using Community scheme.
Sold Prices
The most recent sale of Flat 65, 15, Portman Square completed on 4th March 1998 at £380,000 and was recorded by HM Land Registry as a leasehold flat.
Since 1995 the property has sold twice.
- Sold Mar 1998£380,000
- Sold Mar 1997£225,000
Similar Properties Sold Nearby
Over the past 2 years 54 properties similar to Flat 65, 15, Portman Square have sold within a radius of 320 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 7th October 2025, was Flat 66, 15, Portman Square, London, W1H 6LJ, a leasehold flat which sold for £2,700,000.
Read more about house prices in W1.
- Sold Oct 2025£2,700,000 | 3 Bed FlatFlat 66, 15, Portman Square, London, W1H 6LJFlat 66, 15, Portman Square, London, W1H 6LJ
- Sold Jul 2025£2,100,000 | 3 Bed FlatFlat 54, 15, Portman Square, London, W1H 6LJFlat 54, 15, Portman Square, London, W1H 6LJ
- Sold Jan 2023£2,545,000 | 3 Bed FlatFlat 30, 15, Portman Square, London, W1H 6LJFlat 30, 15, Portman Square, London, W1H 6LJ
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Of the 269 addresses on Portman Square, London, W1, Flat 65, 15, Portman Square comes out as the 142nd largest and the 100th most expensive in our analysis of the public data.
It is also £44k less expensive than the average property across the W1 district.
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Schools Nearby
- St Vincent's Catholic Primary School300 m away
- Hampden Gurney CofE Primary School600 m away
- St Mary's Bryanston Square CofE School700 m away
- The St Marylebone CofE School700 m away
- Marylebone Boys' School1.5 km away
- Maria Fidelis Catholic School FCJ2.2 km away
More reading links
Public Transport Nearby
- Marble Arch|400 m away
- Bond Street|500 m away
- Bond Street (Elizabeth line)|500 m away
Available Internet Speeds
Broadband here reaches ultrafast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Ultrafast Broadband is available in the area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
