Our Data Sources
Flat 2, 21, Onslow Gardens has no records in the the Land Registry and a single entry in the EPC database dated December 2013.
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 2, 21, Onslow Gardens, we estimate a market value of £4,316,457 and a rental value of £11,263 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £3,823,148 and £9,976 per month respectively.
Energy Efficiency
Flat 2, 21, Onslow Gardens has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 13 Dec 2013.
The property is not connected to mains gas and has mostly double glazing. It is heated using Boiler and radiators, mains gas.
Similar Properties Sold Nearby
Over the past 2 years 3 properties similar to Flat 2, 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 13th February 2026, was Flat 5, 21, Onslow Gardens, London, SW7 3AL, a leasehold flat which sold for £3,700,000.
Read more about house prices in SW7.
- Sold Feb 2026£3,700,000 | 3 Bed FlatFlat 5, 21, Onslow Gardens, London, SW7 3ALFlat 5, 21, Onslow Gardens, London, SW7 3AL
- Sold Apr 2025£3,500,000 | 3 Bed Flat47, Rose Square, London, SW3 6RS47, Rose Square, London, SW3 6RS
- Sold Apr 2024£4,100,000 | 3 Bed Flat44, Rose Square, London, SW3 6RS44, Rose Square, London, SW3 6RS
•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 2, 21, Onslow Gardens comes out as the 48th largest and the 28th most expensive in our analysis of the public data.
It is also £1.999m more expensive than the average property across the SW7 district.
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Schools Nearby
- 300mOur Lady of Victories RC Primary School
- 500mOratory Roman Catholic Primary School
- 600mBousfield Primary School
- 1.1kmSt. Thomas More Language College
- 1.5kmChelsea Academy
- 1.5kmThe London Oratory School
More reading links
Public Transport Nearby
- 400mSouth Kensington
- 500mGloucester Road
- 1.1kmEarl's Court
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.
