Property data
Sale history
Date Paid price Annual growth After inflation
Jan 2005 £1,090,000 7.5% 5.9%
Jan 1997 £610,000 na na
Floor plan

Archived estate agent floor plan for 71, Onslow Square.

Floorplan 71
View floorplan
Internal area
131 square metres (1,410 square feet) according to latest EPC inspection
Price per internal area

This property sold for £8,320 per square metre (£773 per square foot) in Jan 2005. Indexed forward to today's value, this is roughly £16,678 per square metre (£1,549 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Jan 2005 £1,090,000 £8,321 £2,184,790 £16,678
Jan 1997 £610,000 £4,656 £2,624,287 £20,033

Calculated using the latest EPC internal area of 131 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 £2,184,790. 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 131 m², this implies a valuation between £1,772,000 and £2,619,000. 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
3
Type
Flat
Council tax band
H
Company ownership
Title number
BGL69471
Tenure
Leasehold/other
Title address
71 Onslow Square, London
Owner
CRANLEY PARTNERS LIMITED (Company reference number: 5298489)
Proprietor address: 18 Cranley Place, London SW7 3AE
Ownership record added to Land Registry's corporate ownership dataset 21 Oct 2008
Archived listings
History:
Archived rental listing for 71 Onslow Square. Advertised on multiple portals. It was added on 13/01/2025. It last appeared Feb 2025.
Photos:

There are 15 archived estate agent listing photos for 71 Onslow Square.

Photos for 71 Onslow Square
View photos
Advertiser remarks:
  • 3 bedrooms
  • 2 bathrooms
EPC Inspections
Summary:
21 March 2023 - energy performance certificate grade D
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 4 habitable rooms. Estimated year built before 1900
Area:
131 sqm (1,410 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.

Summary:
22 February 2013 - energy performance certificate grade D
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
Rental
Tenure:
Private rental
Property type:
1st floor flat in an apartment block with 1 storeys , has 4 habitable rooms. Estimated year built before 1900
Area:
134 sqm (1,442 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.
Frequently asked questions

71 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 £2,184,790.
  • Based on an internal area of 131 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £1,772,000 to £2,619,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, 71 Onslow Square last sold for £1,090,000 in January 2005.

HouseMetric shows 71 Onslow Square as 131 m² (1,410 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 D, from an inspection dated 21 March 2023. EPC information comes from the public Energy Performance Certificate data for England and Wales.

When we last checked, 71 Onslow Square was in council tax band H. Council Tax bands can change, so check the latest Valuation Office Agency Council Tax list.

71 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.