Property data
Sale history
£1,732,000 on Oct 2024

*This price paid record has been flagged by Land Registry as a 'Category B: Additional Price Paid entry'. This could be due to a variety of reasons, such as the sale being a buy-to-let purchase, a repossession or a transfer to a limited company. When Land Registry suspects that a sale does not reflect full market value (e.g. part-ownership or right to buy), these transactions can be flagged as well. For this reason, we exclude them from our area statistics.

Internal area
81 square metres (872 square feet) according to latest EPC inspection
Price per internal area

This property sold for £21,382 per square metre (£1,986 per square foot) in Oct 2024. Indexed forward to today's value, this is roughly £17,935 per square metre (£1,666 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Oct 2024 £1,732,000 £21,383 £1,452,696 £17,935

Calculated using the latest EPC internal area of 81 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 £1,452,696. 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 81 m², this implies a valuation between £1,096,000 and £1,619,000. 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
Company ownership
Title number
BGL54018
Tenure
Leasehold/other
Title address
Flat 1, 73 Onslow Square, London
Owner
WALLENIUS (UK) LIMITED (Company reference number: 01971125)
Proprietor address: 4 Hill Street, London W1J 5NE
Price paid on title: £1,732,000
Ownership record added to Land Registry's corporate ownership dataset 06 Nov 2024
EPC Inspections
Summary:
24 September 2024 - energy performance certificate grade C
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
marketed sale
Tenure:
Owner-occupied
Property type:
2nd floor flat in an apartment block with 1 storeys , has 3 habitable rooms. Estimated year built 1930 to 1949
Area:
81 sqm (872 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.

Summary:
29 November 2012 - energy performance certificate grade D
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:
70 sqm (753 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.
Frequently asked questions

Flat 1 73 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 £1,452,696.
  • Based on an internal area of 81 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £1,096,000 to £1,619,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, Flat 1 73 Onslow Square last sold for £1,732,000 in October 2024.

HouseMetric shows Flat 1 73 Onslow Square as 81 m² (872 sq ft), based on the latest internal area data available for this property.

The latest EPC rating shown by HouseMetric is C, from an inspection dated 24 September 2024. EPC information comes from the public Energy Performance Certificate data for England and Wales.

Flat 1 73 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.