Property data
Sale history
Date Paid price Annual growth After inflation
Feb 2004 £1,050,000 9.4% 7.9%
Apr 1998 £620,000 na na
Bedrooms
na
Type
Flat
Council tax band
na
Company ownership
Title number
BGL120358
Tenure
Leasehold/other
Title address
Flat 1, 23 Onslow Square, London
Owner
ONSLOW SQUARE LIMITED (Company reference number: 8097175)
Proprietor address: 2 Throgmorton Avenue, London EC2N 2DG
Ownership record added to Land Registry's corporate ownership dataset 18 Jan 2016
Planning applications
Planning ref:
June 2020 CON/20/02187
Type:
Discharge of conditions imposed on an existing application
Status:
Application approved with conditions
Address:
Flat 1, 23 Onslow Square, LONDON,
Description:
Details required by Condition 2 (Submission of details) of Listed Building Consent |LB/19/08215 and Conditions 1-5 to be noted (Internal alterations including refurbishment of master bathroom)

Planning ref:
February 2020 LB/19/08215
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
Flat 1, 23 Onslow Square, LONDON,
Description:
Internal alterations including refurbishment of master bathroom.

Planning ref:
February 2020 LB/19/08229
Type:
Heritage application - conservation issues and listed buildings
Status:
Application approved
Address:
Flat 1, 23 Onslow Square, LONDON,
Description:
Installation of satellite dish on the roof.

Planning ref:
February 2020 PP/19/08228
Type:
Full and householder planning application
Status:
Application approved
Address:
Flat 1, 23 Onslow Square, LONDON,
Description:
Installation of satellite dish on the roof.
Frequently asked questions

According to HM Land Registry price paid data, Flat 1 23 Onslow Square last sold for £1,050,000 in February 2004.

Flat 1 23 Onslow Square is in postcode SW7 3NJ, in South Kensington. You can also view HouseMetric's sold-price page for Onslow Square, SW7 3NJ 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 2 July 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.