Our Data Sources
Flat 1, 11, Onslow Square has no records in the Land Registry and a single entry in the EPC database dated October 2019.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 3 out of 5 and is considered of medium 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 1, 11, Onslow Square, we estimate a market value of £2,664,304 and a rental value of £7,707 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £2,359,812 and £6,826 per month respectively.
Energy Efficiency
Flat 1, 11, Onslow Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 28 Oct 2019.
The property is connected to mains gas and has single glazed windows. It is heated using a boiler and radiators (mains gas).
Similar Properties Sold Nearby
Since 2008 13 properties similar to Flat 1, 11, Onslow Square have sold within a radius of 280 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 23rd December 2025, was Flat 8, 20, Onslow Square, London, SW7 3NP, a leasehold flat which sold for £2,280,000.
Read more about house prices in SW7.
- Sold Dec 2025£2,280,000 | 3 Bed FlatFlat 8, 20, Onslow Square, London, SW7 3NPFlat 8, 20, Onslow Square, London, SW7 3NP
- Sold Nov 2025£2,750,000 | 3 Bed FlatFlat 2, 11, Onslow Square, London, SW7 3NJFlat 2, 11, Onslow Square, London, SW7 3NJ
- Sold Oct 2023£2,600,000 | 3 Bed FlatFlat 6, 89, Onslow Square, London, SW7 3LTFlat 6, 89, Onslow Square, London, SW7 3LT
- Sold Sep 2023£2,750,000 | 3 Bed FlatFlat 8, 61, Onslow Square, London, SW7 3LSFlat 8, 61, Onslow Square, London, SW7 3LS
- Sold Oct 2022£3,100,000 | 3 Bed Flat42, Rose Square, London, SW3 6RS42, Rose Square, London, SW3 6RS
Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Explore Nearby Properties
The surrounding properties have an average estimated value of £2,015,704, ranging from £740,694 to £2,612,344.
- Flat 6, 11 Onslow Square
3 Bed Flat | 0 m | Est. Value: £2,468,779
- Flat 3, 11 Onslow Square
2 Bed Flat | 0 m | Est. Value: £1,865,240
- Flat 7, 11 Onslow Square
2 Bed Flat | 0 m | Est. Value: £1,911,191
- Flat 8, 11 Onslow Square
2 Bed Flat | 0 m | Est. Value: £1,293,385
- Flat 4, 11 Onslow Square
3 Bed Flat | 0 m | Est. Value: £2,612,344
Location Comparison
Of the 321 addresses on Onslow Square, London, SW7, Flat 1, 11, Onslow Square comes out as the 209th largest and the 89th most expensive in our analysis of the public data.
It is also £475k more expensive than the average property across the SW7 district.
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Schools Nearby
- Oratory Roman Catholic Primary School300 m away
- Marlborough Primary School400 m away
- Our Lady of Victories RC Primary School500 m away
- St. Thomas More Language College700 m away
- Chelsea Academy1.8 km away
- The London Oratory School1.9 km away
More reading links
Public Transport Nearby
- South Kensington|200 m away
- Gloucester Road|700 m away
- Knightsbridge|1.0 km away
Available Internet Speeds
Broadband here reaches ultrafast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Ultrafast Broadband available in this area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
