Flat 12 105, Onslow Square, SW7 3LU
Flat 12 105 Onslow Square is a 154 m² / 1,658 sq ft flat in South Kensington. It sold for £2,500,000 in April 2021. Indexed forward to today's value, that sale is roughly £2,108k. Recent local prices imply a broad valuation context of £2,084k to £3,078k 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 Apr 2021 £2,500,000 11.0% 8.8% Sep 1996 £195,000 na na - Floor plan
-
Archived estate agent floor plan for Flat 12 105, Onslow Square.
- Internal area
- 154 square metres (1,658 square feet) according to latest EPC inspection
- Price per internal area
-
This property sold for £16,233 per square metre (£1,508 per square foot) in Apr 2021. Indexed forward to today's value, this is roughly £13,687 per square metre (£1,272 per square foot) .
Date Paid price Paid £/sqm Today's value Today's value £/sqm Apr 2021 £2,500,000 £16,234 £2,107,758 £13,687 Sep 1996 £195,000 £1,266 £1,200,941 £7,798 Calculated using the latest EPC internal area of 154 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 £2,107,758. 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 154 m², this implies a valuation between £2,084,000 and £3,078,000. 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:
- April 2023 LB/23/01607
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application approved
- Address:
- Flat 12, 105 Onslow Square, LONDON,
- Description:
- Removal of wall between kitchen and corridor to create larger living space. Straighten wall between kitchen and bathroom. Replace rear metal windows with timber framed double glazed sash widows with lambs tongue in reveal to match front windows, replacing one front window. Replace internal doors. Remove and replace chimney piece. New flooring with acoustic insulation. New vents and soil pipes to rear elevation.
- Planning ref:
- April 2023 PP/23/01606
- Type:
- Full and householder planning application
- Status:
- Application approved
- Address:
- Flat 12, 105 Onslow Square, LONDON,
- Description:
- Removal of wall between kitchen and corridor to create larger living space. Straighten wall between kitchen and bathroom. Replace rear metal windows with timber framed double glazed sash widows with lambs tongue in reveal to match front windows, replacing one front window. Replace internal doors. Remove and replace chimney piece. New flooring with acoustic insulation. New vents and soil pipes to rear elevation.
- Planning ref:
- November 2022 LB/22/05619
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application withdrawn before a decision was taken
- Address:
- Flat 12, 105 Onslow Square, LONDON,
- Description:
- Internal alterations and reconfiguration of layout; general upgrade, replacement and upgrade of single glazed sash windows and metal framed windows to double glazed sash windows at 4th floor front and rear elevations ***WITHDRAWN***
- Planning ref:
- November 2022 PP/22/05618
- Type:
- Full and householder planning application
- Status:
- Application withdrawn before a decision was taken
- Address:
- Flat 12, 105 Onslow Square, LONDON,
- Description:
- Internal alterations and reconfiguration of layout; general upgrade, replacement and upgrade of single glazed sash windows and metal framed windows to double glazed sash windows at 4th floor front and rear elevations ***WITHDRAWN***
- Summary:
- 13 April 2018 - energy performance certificate grade D
- Certificate:
- View energy certificate on GOV.UK
- Reason for EPC:
- marketed sale
- Tenure:
- Owner-occupied
- Property type:
- 3rd floor flat on the top floor in an apartment block with 1 storeys , has 6 habitable rooms. Estimated year built before 1900
- Area:
- 154 sqm (1,658 square foot) total internal area
- Comments:
- Walls: Solid brick, as built, no insulation (assumed). Roof: Pitched, 100 mm loft insulation. Heating: Community scheme.
Flat 12 105 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 £2,107,758.
- Based on an internal area of 154 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £2,084,000 to £3,078,000, using HouseMetric's implied valuation methodology.
For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.