Flat 1 61, Onslow Square, SW7 3LS
Flat 1 61 Onslow Square is a 143 m² / 1,539 sq ft flat in South Kensington. It sold for £5,000,000 in March 2018. Indexed forward to today's value, that sale is roughly £4,042k. Recent local prices imply a broad valuation context of £1,935k to £2,859k based on its internal area. The Land Registry and EPC data was last updated 1 June 2026.
- Sale history
-
£5,000,000 on Mar 2018
- Floor plan
-
Archived estate agent floor plan for Flat 1 61, Onslow Square.
- Internal area
- 143 square metres (1,539 square feet) according to latest EPC inspection
- Price per internal area
-
This property sold for £34,965 per square metre (£3,248 per square foot) in Mar 2018. Indexed forward to today's value, this is roughly £28,262 per square metre (£2,626 per square foot) .
Date Paid price Paid £/sqm Today's value Today's value £/sqm Mar 2018 £5,000,000 £34,965 £4,041,533 £28,262 Calculated using the latest EPC internal area of 143 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 £4,041,533. 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 143 m², this implies a valuation between £1,935,000 and £2,859,000. 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
- Planning ref:
- January 2019 CON/18/05739
- Type:
- Discharge of conditions imposed on an existing application
- Status:
- Application approved with conditions
- Address:
- Flat 1, 61 Onslow Square, LONDON,
- Description:
- Details required by conditions 3a (replacement elements to French doors) and 3b (double-glazing to rear windows) of planning permission 18/03822(Internal alterations including partial removal of kitchen walls, adding double doors to front rooms, repairing cracked ceiling and cornice work. Replacing non-original glazing bars to front French windows and replacing rear crittall windows. Addition of vent for kitchen extract on rear elevation).
- Planning ref:
- January 2019 CON/18/05741
- Type:
- Discharge of conditions imposed on an existing application
- Status:
- Application approved with conditions
- Address:
- Flat 1, 61 Onslow Square, LONDON,
- Description:
- Details required by conditions 2a (replacement elements to French doors), 2b (double-glazing to rear windows), 2c (new skirting), 2d (new opening), 2e (floor build-up), 5a (new double doors), 5b (new single door), 5c (Schedule for removal of doors and installation of doors) of listed building consent 18/03816(Internal alterations including partial removal of kitchen walls, adding double doors to front rooms, repairing cracked ceiling and cornice work. Replacing non-original glazing bars to front French windows and replacing rear crittall windows. Addition of vent for kitchen extract on rear elevation).
- Planning ref:
- September 2018 LB/18/03816
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application approved
- Address:
- Flat 1, 61 Onslow Square, LONDON,
- Description:
- Internal alterations including partial removal of kitchen walls, adding double doors to front rooms, repairing cracked ceiling and cornice work. Replacing non-original glazing bars to front French windows and replacing rear crittall windows. Addition of vent for kitchen extract on rear elevation.
- Planning ref:
- September 2018 PP/18/03822
- Type:
- Full and householder planning application
- Status:
- Application approved
- Address:
- Flat 1, 61 Onslow Square, LONDON,
- Description:
- Internal alterations including partial removal of kitchen walls, adding double doors to front rooms, repairing cracked ceiling and cornice work. Replacing non-original glazing bars to front French windows and replacing rear crittall windows. Addition of vent for kitchen extract on rear elevation.
- Summary:
- 04 May 2016 - 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 4 habitable rooms. Estimated year built before 1900
- Area:
- 143 sqm (1,539 square foot) total internal area
- Comments:
- Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.
Flat 1 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 £4,041,533.
- Based on an internal area of 143 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £1,935,000 to £2,859,000, using HouseMetric's implied valuation methodology.
For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.