63, Onslow Square, SW7 3LS

63 Onslow Square is a 126 m² / 1,356 sq ft flat in South Kensington. It sold for £3,000,000 in January 2017. Indexed forward to today's value, that sale is roughly £2,368k. Recent local prices imply a broad valuation context of £1,705k to £2,519k based on its internal area. The Land Registry and EPC data was last updated 1 June 2026.

Property data
Sale history
£3,000,000 on Jan 2017

*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
126 square metres (1,356 square feet) according to latest EPC inspection
Price per internal area

This property sold for £23,809 per square metre (£2,212 per square foot) in Jan 2017. Indexed forward to today's value, this is roughly £18,795 per square metre (£1,746 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Jan 2017 £3,000,000 £23,810 £2,368,190 £18,795

Calculated using the latest EPC internal area of 126 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 £2,368,190. 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 126 m², this implies a valuation between £1,705,000 and £2,519,000. 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
H
Company ownership
Title number
BGL141689
Tenure
Leasehold/other
Title address
63 Onslow Square, London
Owner
ROSE CHAPLET NOMINEES LIMITED (Company reference number: 05678129)
Proprietor address: 71 Queen Victoria Street, London EC4V 4AY, Leverhulme Estates, Estate Office, Manor Road, Thornton Hough, Wirral CH63 1JD
Ownership record added to Land Registry's corporate ownership dataset 01 Jun 2018
Title number
BGL141689
Tenure
Leasehold/other
Title address
63 Onslow Square, London
Owner
REVEILLE NOMINEES LIMITED (Company reference number: 05678115)
Proprietor address: 71 Queen Victoria Street, London EC4V 4AY, Leverhulme Estates, Estate Office, Manor Road, Thornton Hough, Wirral CH63 1JD
Ownership record added to Land Registry's corporate ownership dataset 01 Jun 2018
Planning applications
Planning ref:
September 2018 CON/18/03249
Type:
Discharge of conditions imposed on an existing application
Status:
Application approved with conditions
Address:
63 Onslow Square, LONDON,
Description:
Details of condition 2 (submission of details) of listed building consent 17/02719 (Internal alterations to ground floor flat).
Planning ref:
July 2018 PP/18/02885
Type:
Full and householder planning application
Status:
Application approved
Address:
63 Onslow Square, LONDON,
Description:
Variation of condition 2 (approved drawings) of planning permission 17/027634 to allow new rear terrace to be reconfigured to match existing terrace and access created to lightwell below paved in York stone with york stone cladding to steps
Planning ref:
June 2018 CON/18/02227
Type:
Discharge of conditions imposed on an existing application
Status:
Application approved with conditions
Address:
63 Onslow Square, LONDON,
Description:
Details required by condition 3 (submission of details) of planning permission 17/02763 (Works to rear of ground floor dwelling involving provision of replacement and additional terrace areas with steps down to communal garden, provision of railings and installation of replacement fenestration)
Planning ref:
June 2018 CON/18/02228
Type:
Discharge of conditions imposed on an existing application
Status:
Application approved with conditions
Address:
63 Onslow Square, LONDON,
Description:
Details required by condition 3 (submission of details) of listed building consent 17/02764 (Works to rear of ground floor dwelling involving provision of replacement and additional terrace areas with steps down to communal garden, provision of railings and installation of replacement fenestration)
Planning ref:
June 2018 LB/18/02231
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
63 Onslow Square, LONDON,
Description:
Amendment to listed building consent reference LB/17/02719 involving relocation of guest wc and utility room in rear main hallway at upper ground floor level.
Planning ref:
May 2018 NMA/18/02226
Type:
Amendments or alterations arising from an existing or previous application
Status:
Application withdrawn before a decision was taken
Address:
63 Onslow Square, LONDON,
Description:
Non-material amendment to planning permission 17/02763 to allow retention of terrace layout, replacment of ballustrade, cladding of terrace and steps with stone; re-configuration of new terrace to match existing terrace layout***WITHDRAWN***
Planning ref:
June 2017 LB/17/02719
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
63 Onslow Square, LONDON,
Description:
Internal alterations to ground floor flat.
Planning ref:
June 2017 LB/17/02764
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
63 Onslow Square, LONDON,
Description:
Works to rear of ground floor dwelling involving provision of replacement and additional terrace areas with steps down to communal garden, provision of railings and installation of replacement fenestration
Planning ref:
June 2017 PP/17/02763
Type:
Full and householder planning application
Status:
Application approved
Address:
63 Onslow Square, LONDON,
Description:
Works to rear of ground floor dwelling involving provision of replacement and additional terrace areas with steps down to communal garden, provision of railings and installation of replacement fenestration
EPC Inspections
Summary:
27 June 2019 - 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 4 habitable rooms. Estimated year built 1900 to 1929
Area:
126 sqm (1,356 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.
Frequently asked questions

63 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 £2,368,190.
  • Based on an internal area of 126 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £1,705,000 to £2,519,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, 63 Onslow Square last sold for £3,000,000 in January 2017.

HouseMetric shows 63 Onslow Square as 126 m² (1,356 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 27 June 2019. EPC information comes from the public Energy Performance Certificate data for England and Wales.

When we last checked, 63 Onslow Square was in council tax band H. Council Tax bands can change, so check the latest Valuation Office Agency Council Tax list.

63 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.