Property data
Sale history
Date Paid price Annual growth After inflation
Jun 2024 £5,000,000 5.7% 2.8%
Jun 2005 £1,750,000 1.5% 0.0%
Jun 2001 £1,650,000 na na
Internal area
135 square metres (1,453 square feet) according to latest EPC inspection
Price per internal area

This property sold for £37,037 per square metre (£3,441 per square foot) in Jun 2024. Indexed forward to today's value, this is roughly £29,896 per square metre (£2,777 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Jun 2024 £5,000,000 £37,037 £4,035,951 £29,896
Jun 2005 £1,750,000 £12,963 £3,455,019 £25,593
Jun 2001 £1,650,000 £12,222 £4,167,105 £30,867

Calculated using the latest EPC internal area of 135 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 £4,035,951. 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 £13,530 and £19,990 per square metre (£1,256 and £1,857 per square foot). Based on an internal area of 135 m², this implies a valuation between £1,827,000 and £2,699,000. 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
2
Type
Flat
Council tax band
G
Planning applications
Planning ref:
April 2025 CON/25/01113
Type:
Discharge of conditions imposed on an existing application
Status:
Application approved with conditions
Address:
Flat 2, 69 Onslow Square, LONDON,
Description:
Details required by Condition 3 (submission of details - d) Internal elevation and section drawings (1:10) of replacement kitchen units, with these to be scribed around any existing/proposed skirting and set down from the ceiling) of Listed Building consent LB/24/04916 (Internal cosmetic alterations, replace flooring finishes internally and to terrace, along with adding a cloakroom W/C within hall)

Planning ref:
December 2024 CON/24/08542
Type:
Discharge of conditions imposed on an existing application
Status:
Decision has yet to be made
Address:
Flat 2, 69 Onslow Square, LONDON,
Description:
Details required by condition 3b, d, e, f & g (submission of details - (b) Details of existing and proposed floor build ups in section (1:5), showing retention of historic joists, floorboards and skirting boards and details of any door trimming. Drawings to include detailing of junction with architraves and skirtings and proposed floor finishes; (d) Internal elevation and section drawings (1:10) of replacement kitchen units, with these to be scribed around any existing/proposed skirting and set down from the ceiling; (e) Details of existing and replacement lighting, including ceiling plan; (f) Details of servicing for cloakroom, including means of ventilation; (g) Detailed elevation and section drawing (1:10) of four panelled door to cloakroom ) of listed building consent 24/04916 (Internal cosmetic alterations, replace flooring finishes internally and to terrace, along with adding a cloakroom W/C within hall.)

Planning ref:
September 2024 LB/24/04916
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
Flat 2, 69 Onslow Square, LONDON,
Description:
Internal cosmetic alterations, replace flooring finishes internally and to terrace, along with adding a cloakroom W/C within hall.
EPC Inspections
Summary:
18 September 2020 - energy performance certificate grade C
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
Rental
Tenure:
Private rental
Property type:
2nd floor flat in an apartment block with 1 storeys , has 3 habitable rooms. Estimated year built before 1900
Area:
135 sqm (1,453 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Boiler and radiators, mains gas.
Frequently asked questions

Flat 2 69 Onslow Square is worth whatever price a willing buyer and seller agree upon. However, the following can provide useful context.

  • HouseMetric estimates the most recent sale price indexed forward to today's value is £4,035,951.
  • Based on an internal area of 135 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £1,827,000 to £2,699,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, Flat 2 69 Onslow Square last sold for £5,000,000 in June 2024.

HouseMetric shows Flat 2 69 Onslow Square as 135 m² (1,453 sq ft), based on the latest internal area data available for this property. The bedroom count is shown as 2 bedrooms. Bedroom numbers can come from a previous estate agency listing, an EPC record, or an estimate based on the size of the property.

The latest EPC rating shown by HouseMetric is C, from an inspection dated 18 September 2020. EPC information comes from the public Energy Performance Certificate data for England and Wales.

When we last checked, Flat 2 69 Onslow Square was in council tax band G. Council Tax bands can change, so check the latest Valuation Office Agency Council Tax list.

Flat 2 69 Onslow Square is in postcode SW7 3LS, in South Kensington. You can also view HouseMetric's sold-price page for Onslow Square, SW7 3LS or analysis of the South Kensington property market.

HouseMetric combines HM Land Registry price paid data, Energy Performance Certificate data and Ordnance Survey/open data. The data were last updated 1 June 2026. Figures such as indexed values and local valuation ranges are calculated estimates for context, while official records can change as public datasets are updated.

For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.