Our Data Sources
Flat 4, 51, Onslow Square has 2 entries in the Land Registry, most recently in May 2009 and a single entry in the EPC database dated July 2024.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 1 out of 5 and is considered of low accuracy.
Price Range & Condition
In very good condition, we estimate Flat 4, 51, Onslow Square would be worth £3,383,908, with a potential rental value of £9,434 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £2,997,175, with a rental value of £8,355 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Energy Efficiency
Flat 4, 51, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 16 Jul 2024.
The property is not connected to mains gas and has single glazed windows. It is heated using community scheme.
Sold Prices
Flat 4, 51, Onslow Square last changed hands on 22nd May 2009, selling for £2,300,000. The transaction was logged as a leasehold flat by HM Land Registry.
In total it has sold twice since 1995.
The market for similar properties has risen by 12.1% since May 2009.
- Sold May 2009£2,300,000
- Sold Mar 2007£2,200,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 11 sales of comparable properties within 270 metres of Flat 4, 51, Onslow Square since 2014.
Most recently, Flat 10, 81, Onslow Square, London, SW7 3LT, a leasehold flat, sold at £2,500,000 on the 15th August 2025.
Read more about house prices in SW7.
- Sold Aug 2025£2,500,000 | 3 Bed FlatFlat 10, 81, Onslow Square, London, SW7 3LTFlat 10, 81, Onslow Square, London, SW7 3LT
- Sold Jul 2025£2,190,000 | 3 Bed FlatFlat 1, 23, Sumner Place, London, SW7 3EGFlat 1, 23, Sumner Place, London, SW7 3EG
- Sold Dec 2023£2,841,500 | 3 Bed Flat62, Rose Square, London, SW3 6RS62, Rose Square, London, SW3 6RS
- Sold Aug 2022£3,600,000 | 3 Bed FlatFlat 1, 17, Onslow Square, London, SW7 3NJFlat 1, 17, Onslow Square, London, SW7 3NJ
- Sold Dec 2020£4,950,000 | 3 Bed Flat47, Onslow Square, London, SW7 3LR47, Onslow Square, London, SW7 3LR
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 £3,920,264, ranging from £1,059,965 to £7,927,484.
- Flat 5, 51 Onslow Square
2 Bed Flat | 0 m | Est. Value: £1,717,543
- Flat 9, 51 Onslow Square
2 Bed Flat | 0 m | Est. Value: £1,648,836
- Flat 6, 51 Onslow Square
3 Bed Flat | 0 m | Est. Value: £3,198,082
- Basement
1 Bed Flat | 2 m | Est. Value: £1,059,965
- 53 Onslow Square
3 Bed Flat | 7 m | Est. Value: £2,854,372
Location Comparison
Our analysis of the public data ranks Flat 4, 51, Onslow Square as the 96th largest and the 48th most expensive of the 321 addresses on Onslow Square, London, SW7.
Against the SW7 postcode district average, it is £1.16m more expensive than the typical property.
More reading links
Schools Nearby
- Oratory Roman Catholic Primary School400 m away
- Our Lady of Victories RC Primary School400 m away
- Marlborough Primary School500 m away
- St. Thomas More Language College800 m away
- Chelsea Academy1.8 km away
- The London Oratory School1.9 km away
More reading links
Public Transport Nearby
- South Kensington|100 m away
- Gloucester Road|600 m away
- Knightsbridge|1.1 km away
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast Broadband available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
