Flat 4 89, Onslow Square, SW7 3LT
Flat 4 89 Onslow Square is a 106 m² / 1,141 sq ft flat in South Kensington. It sold for £2,450,000 in January 2021. Indexed forward to today's value, that sale is roughly £2,020k. Recent local prices imply a broad valuation context of £1,434k to £2,119k based on its internal area. The Land Registry and EPC data was last updated 1 June 2026.
- Sale history
-
£2,450,000 on Jan 2021
- Internal area
- 106 square metres (1,141 square feet) according to latest EPC inspection
- Price per internal area
-
This property sold for £23,113 per square metre (£2,147 per square foot) in Jan 2021. Indexed forward to today's value, this is roughly £19,060 per square metre (£1,771 per square foot) .
Date Paid price Paid £/sqm Today's value Today's value £/sqm Jan 2021 £2,450,000 £23,113 £2,020,374 £19,060 Calculated using the latest EPC internal area of 106 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 £2,020,374. 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 106 m², this implies a valuation between £1,434,000 and £2,119,000. 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:
- February 2022 LB/21/07800
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application approved
- Address:
- Flat 4, 89 Onslow Square, LONDON,
- Description:
- Internal alterations and refurbishment in ground floor flat (Listed Building Consent only)
- Planning ref:
- September 2021 LB/21/05194
- Type:
- Heritage application - conservation issues and listed buildings
- Status:
- Application withdrawn before a decision was taken
- Address:
- Flat 4, 89 Onslow Square, LONDON,
- Description:
- Removing of existing window and replacing with French doors and window over to form a Juliette balcony in rear elevation. ***WITHDRAWN***
- Planning ref:
- September 2021 PP/21/05193
- Type:
- Full and householder planning application
- Status:
- Application withdrawn before a decision was taken
- Address:
- Flat 4, 89 Onslow Square, LONDON,
- Description:
- Removing of existing window and replacing with French doors and window over to form a Juliette balcony in rear elevation. ***WITHDRAWN***
- Summary:
- 09 November 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 4 habitable rooms. Estimated year built before 1900
- Area:
- 106 sqm (1,141 square foot) total internal area
- Comments:
- Walls: Solid brick, as built, no insulation (assumed). Roof: (another dwelling above). Heating: Community scheme.
Flat 4 89 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 £2,020,374.
- Based on an internal area of 106 m² and recent prices in South Kensington, this implies a lower and upper quartile range from £1,434,000 to £2,119,000, using HouseMetric's implied valuation methodology.
For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.