Our Data Sources
Flat 4, 21, Onslow Gardens has no recent1 records in the the Land Registry and a single entry in the EPC database dated May 2026.
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 4, 21, Onslow Gardens, we estimate a market value of £2,200,193 and a rental value of £6,040 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £1,948,743 and £5,349 per month respectively.
Energy Efficiency
Flat 4, 21, Onslow Gardens has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 15 May 2026.
The property is connected to mains gas and has partial double glazing. It is heated using Boiler and radiators, mains gas.
Sold Prices
The most recent sale of Flat 4, 21, Onslow Gardens completed on 5th August 2002 at £730,000 and was recorded by HM Land Registry as a leasehold flat.
Since 1995 this is the property's only sale.
- Sold Aug 2002£730,000
Similar Properties Sold Nearby
Over the past 2 years 17 properties similar to Flat 4, 21, Onslow Gardens have sold within a radius of 230 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 6th March 2026, was Flat 12, 35, Onslow Gardens, London, SW7 3PY, a leasehold flat which sold for £1,850,000.
Read more about house prices in SW7.
- Sold Mar 2026£1,850,000 | 3 Bed FlatFlat 12, 35, Onslow Gardens, London, SW7 3PYFlat 12, 35, Onslow Gardens, London, SW7 3PY
- Sold Jul 2024£1,900,000 | 3 Bed Flat3, Rose Square, London, SW3 6RS3, Rose Square, London, SW3 6RS
- Sold Jan 2024£2,160,000 | 2 Bed FlatFlat 3, 24, Onslow Gardens, London, SW7 3ALFlat 3, 24, Onslow Gardens, London, SW7 3AL
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Of the 504 addresses on Onslow Gardens, London, SW7, Flat 4, 21, Onslow Gardens comes out as the 212th largest and the 122nd most expensive in our analysis of the public data.
It is also £3k more expensive than the average property across the SW7 district.
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Schools Nearby
- Our Lady of Victories RC Primary School300 m away
- Oratory Roman Catholic Primary School500 m away
- Bousfield Primary School600 m away
- St. Thomas More Language College1.1 km away
- Chelsea Academy1.5 km away
- The London Oratory School1.5 km away
More reading links
Public Transport Nearby
- South Kensington|400 m away
- Gloucester Road|500 m away
- Earl's Court|1.1 km away
Available Internet Speeds
Broadband here reaches superfast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
