Property data
Sale history
Date Paid price Annual growth After inflation
Mar 2015 £4,100,000 * 12.8% 10.5%
Jun 1995 £380,000 na na

*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
145 square metres (1,561 square feet) according to latest EPC inspection
Price per internal area

This property sold for £28,275 per square metre (£2,627 per square foot) in Mar 2015. Indexed forward to today's value, this is roughly £34,744 per square metre (£3,228 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Mar 2015 £4,100,000 £28,276 £5,037,884 £34,744
Jun 1995 £380,000 £2,621 £1,978,105 £13,642

Calculated using the latest EPC internal area of 145 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 £5,037,884. 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 145 m², this implies a valuation between £1,962,000 and £2,899,000. 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
3
Type
Other
Council tax band
H
Company ownership
Title number
BGL53824
Tenure
Leasehold/other
Title address
Flat 5, 61 Onslow Square, London
Owner
PAOSAR S.L
Incorporated in SPAIN
Proprietor address: 4 Grosvenor Place, London SW1X 7HJ
Price paid on title: £4,100,000
Ownership record added to Land Registry's corporate ownership dataset 30 Mar 2015
EPC Inspections
Summary:
18 April 2012 - energy performance certificate grade C
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
marketed sale
Tenure:
Unknown
Property type:
2nd floor flat in an apartment block with 1 storeys , has 6 habitable rooms. Estimated year built before 1900
Area:
145 sqm (1,561 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 5 61 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 £5,037,884.
  • Based on an internal area of 145 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £1,962,000 to £2,899,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, Flat 5 61 Onslow Square last sold for £4,100,000 in March 2015.

HouseMetric shows Flat 5 61 Onslow Square as 145 m² (1,561 sq ft), based on the latest internal area data available for this property. The bedroom count is shown as 3 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 April 2012. EPC information comes from the public Energy Performance Certificate data for England and Wales.

When we last checked, Flat 5 61 Onslow Square was in council tax band H. Council Tax bands can change, so check the latest Valuation Office Agency Council Tax list.

Flat 5 61 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.