Our Data Sources
Flat 3, 26, Onslow Gardens has a single entry in the Land Registry from March 2025 and a single entry in the EPC database dated August 2018.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 2 out of 5 and is considered of medium accuracy.
Price Range & Condition
In very good condition, we estimate Flat 3, 26, Onslow Gardens would be worth £3,568,109, with a potential rental value of £9,517 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £3,160,325, with a rental value of £8,429 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Energy Efficiency
Flat 3, 26, Onslow Gardens has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 08 Aug 2018.
The property is connected to mains gas and has single glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
Flat 3, 26, Onslow Gardens last changed hands on 28th March 2025, selling for £3,500,000. The transaction was logged as a leasehold flat by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has dropped by 26.9% since March 2025.
- Sold Mar 2025£3,500,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 3 sales of comparable properties within 240 metres of Flat 3, 26, Onslow Gardens across the last 2 years.
Most recently, Flat 5, 21, Onslow Gardens, London, SW7 3AL, a leasehold flat, sold at £3,700,000 on the 13th February 2026.
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 Jul 2025£2,190,000 | 3 Bed FlatFlat 1, 23, Sumner Place, London, SW7 3EGFlat 1, 23, Sumner Place, London, SW7 3EG
- Sold Aug 2021£11,500,000 | 3 Bed Flat43, Onslow Gardens, London, SW7 3PY43, Onslow Gardens, London, SW7 3PY
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks Flat 3, 26, Onslow Gardens as the 100th largest and the 50th most expensive of the 504 addresses on Onslow Gardens, London, SW7.
Against the SW7 postcode district average, it is £1.286m more expensive than the typical property.
More reading links
Schools Nearby
- 200mOur Lady of Victories RC Primary School
- 500mOratory Roman Catholic Primary School
- 600mBousfield Primary School
- 1.1kmSt. Thomas More Language College
- 1.5kmChelsea Academy
- 1.6kmThe London Oratory School
More reading links
Public Transport Nearby
- 400mSouth Kensington
- 500mGloucester Road
- 1.1kmEarl's Court
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a very low risk of flooding.
