Flat 9 105, Onslow Square, SW7 3LU
Flat 9 105 Onslow Square is a 338 m² / 3,638 sq ft flat in South Kensington. It sold for £5,500,000 in January 2023. Indexed forward to today's value, that sale is roughly £4,218k. Recent local prices imply a broad valuation context of £4,573k to £6,757k based on its internal area. The Land Registry and EPC data was last updated 1 June 2026.
- Sale history
-
Date Paid price Annual growth After inflation Jan 2023 £5,500,000 39.2% 35.8% May 2011 £115,625 -26.0% -27.8% Apr 2003 £1,300,000 6.5% 4.7% Jan 1998 £935,000 20.8% 18.4% Feb 1996 £645,000 na na - Floor plan
-
Archived estate agent floor plan for Flat 9 105, Onslow Square.
- Internal area
- 338 square metres (3,638 square feet) according to latest EPC inspection
- Price per internal area
-
This property sold for £16,272 per square metre (£1,512 per square foot) in Jan 2023. Indexed forward to today's value, this is roughly £12,480 per square metre (£1,159 per square foot) .
Date Paid price Paid £/sqm Today's value Today's value £/sqm Jan 2023 £5,500,000 £16,272 £4,218,265 £12,480 May 2011 £115,625 £342 £169,249 £501 Apr 2003 £1,300,000 £3,846 £2,964,283 £8,770 Jan 1998 £935,000 £2,766 £3,616,357 £10,699 Feb 1996 £645,000 £1,908 £3,202,447 £9,475 Calculated using the latest EPC internal area of 338 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 £4,218,265. 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 338 m², this implies a valuation between £4,573,000 and £6,757,000. 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
- Planning ref:
- March 2024 PP/23/07434
- Type:
- Full and householder planning application
- Status:
- Application approved
- Address:
- Flat 9, 105 Onslow Square, LONDON,
- Description:
- Replacement of three non-original steel Crittal windows with single glazed, white painted, timber sash windows; internal layout changes and renovations, including structural works to raise steels into floor void and enlarge structural opening
- Planning ref:
- February 2024 LB/23/07435
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application approved
- Address:
- Flat 9, 105 Onslow Square, LONDON,
- Description:
- Replacement of three non-original steel Crittal windows with single glazed, white painted, timber sash windows; internal layout changes and renovations, including structural works to raise steels into floor void and enlarge structural opening
- Planning ref:
- September 2023 LB/23/04883
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application refused
- Address:
- Flat 9, 105 Onslow Square, LONDON,
- Description:
- Replacement of three modern steel frame windows with timber sash windows. Internal layout changes and renovations to listed property, including structural works to raise steels into floor void and enlarge existing structural opening.
- Planning ref:
- September 2023 PP/23/04882
- Type:
- Full and householder planning application
- Status:
- Application refused
- Address:
- Flat 9, 105 Onslow Square, LONDON,
- Description:
- Replacement of three modern steel frame windows with timber sash windows. Internal layout changes and renovations to listed property, including structural works to raise steels into floor void and enlarge existing structural opening.
- Planning ref:
- March 2021 LB/20/07230
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application approved
- Address:
- Flat 9, 105 Onslow Square, LONDON,
- Description:
- Retention of unauthorised internal works to third floor flat, including enlargement of three openings in party walls and reconfiguration of modern partitioning. (Listed Building Consent only)
- Summary:
- 29 July 2020 - 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 9 habitable rooms. Estimated year built before 1900
- Area:
- 338 sqm (3,638 square foot) total internal area
- Comments:
- Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.
Flat 9 105 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 £4,218,265.
- Based on an internal area of 338 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £4,573,000 to £6,757,000, using HouseMetric's implied valuation methodology.
For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.