Property data
Sale history
£1,850,000 on Mar 2026
Internal area
100 square metres (1,076 square feet) according to latest EPC inspection
Price per internal area

This property sold for £18,500 per square metre (£1,719 per square foot) in Mar 2026. Indexed forward to today's value, this is roughly £18,734 per square metre (£1,740 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Mar 2026 £1,850,000 £18,500 £1,873,376 £18,734

Calculated using the latest EPC internal area of 100 m². Earlier sale dates may not have had the same measured area available.

Valuation
The most recent sale price indexed forward to today's value is £1,873,376. This is one data point to inform the valuation. Another method is the valuation implied by what comparable homes are selling for. Homes in South Kensington are now selling for between £13,760 and £20,510 per square metre (£1,278 and £1,905 per square foot). Based on an internal area of 100 m², this implies a valuation between £1,376,000 and £2,051,000. Treat this as context only. For a valuation using hand-picked comparable sales, use the Advanced search tool — create a shortlist of similar condition homes, then export a valuation report.
Bedrooms
na
Type
Flat
Council tax band
na
Planning applications
Planning ref:
January 2023 LB/22/03764
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
Flat 12, 35 Onslow Gardens, LONDON,
Description:
Installation of internal comfort cooling 'fan coil' units within joinery with an external condenser unit located externally on flat roof above current kitchen.

Planning ref:
January 2023 PP/22/03763
Type:
Full and householder planning application
Status:
Application approved
Address:
Flat 12, 35 Onslow Gardens, LONDON,
Description:
Installation of internal comfort cooling 'fan coil' units within joinery with an external condenser unit located externally on flat roof above current kitchen.

Planning ref:
January 2023 CON/22/03782
Type:
Discharge of conditions imposed on an existing application
Status:
Application approved with conditions
Address:
Flat 12, 35 Onslow Gardens, LONDON,
Description:
Details required by Condition 3a (Submission of details - rooflights) of Listed Building Consent LB/22/01100 (Internal refurbishment, replacement of existing windows with new to match, and a new velux conservation roof window)

Planning ref:
January 2023 CON/22/03780
Type:
Discharge of conditions imposed on an existing application
Status:
Application approved with conditions
Address:
Flat 12, 35 Onslow Gardens, LONDON,
Description:
Details required by Condition 4a (Submission of details - rooflights) of planning permission PP/22/01099 (Internal refurbishment, replacement of existing windows with new to match, and a new velux conservation roof window)

Planning ref:
April 2022 LB/22/01100
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
Flat 12, 35 Onslow Gardens, LONDON,
Description:
Internal refurbishment, replacement of existing windows with new to match, and a new velux conservation roof window.

Planning ref:
April 2022 PP/22/01099
Type:
Full and householder planning application
Status:
Application approved
Address:
Flat 12, 35 Onslow Gardens, LONDON,
Description:
Internal refurbishment, replacement of existing windows with new to match, and a new velux conservation roof window.
EPC Inspections
Summary:
22 January 2024 - energy performance certificate grade D
Reason for EPC:
Rental
Tenure:
Private rental
Property type:
3rd floor flat on the top floor in an apartment block with 1 storeys , has 3 habitable rooms. Estimated year built 1900 to 1929
Area:
100 sqm (1,076 square foot) total internal area
Comments:
Walls: Timber frame, as built, no insulation (assumed). Roof: Pitched, no insulation (assumed). Heating: Boiler and radiators, mains gas.

Summary:
08 August 2013 - energy performance certificate grade E
Reason for EPC:
Marketed sale
Tenure:
Owner-occupied
Property type:
3rd floor flat on the top floor in an apartment block with 1 storeys , has 4 habitable rooms. Estimated year built 1900 to 1929
Area:
110 sqm (1,184 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: Pitched, no insulation (assumed). Heating: Boiler and radiators, mains gas.