Flat 5 21 Onslow Gardens

    FLAT 5 21, ONSLOW GARDENS, LONDON, SW7 3AL

    This flat/maisonette leasehold property on Onslow Gardens last sold in February 2026 for £3,700,000. Based on price growth in the SW7 district since then, its estimated current value is £3,700,000 — placing it in the 99th percentile nationally and the 95th percentile within SW7. The property covers 156 m² (1,679 sq ft), giving an estimated value of £23,718 per m². The EPC rating is D, with a potential rating of C.

    Type

    Flat/Maisonette

    Tenure

    Leasehold

    Floor Area

    1,679 sq ft

    156 m²

    Last Sale Price

    £3,700,000

    Feb 2026

    Estimated Valuation

    £3,700,000

    Est. £/sq ft

    £2,203/sq ft

    £23,718/m²

    Property Details

    TypeFlat/Maisonette
    TenureLeasehold
    Built formMid-Terrace
    Construction ageEngland and Wales: before 1900
    Habitable rooms4
    Main fuelmains gas (not community)
    EPC currentD
    EPC potentialC
    Floor area1,679 sq ft (156 m²)
    EPC dateApr 2019
    WallsSolid brick, as built, no insulation (assumed)
    HeatingBoiler and radiators, mains gas

    Transaction History

    13 Feb 2026

    £3,700,000

    Key Metrics

    Estimated valuation£3,700,000
    Value per sq ft / m²£2,203/sq ft (£23,718/m²)
    Estimated gross yieldNot available
    Implied monthly rentNot available
    SW7 district percentile95th percentile
    National percentile99th percentile

    District Context — SW7

    SW7 covers South Kensington and the surrounding area in central London, positioned in the heart of the capital's most prestigious neighbourhood. It is characterised by grand Victorian and Edwardian mansion blocks, world-class museums, and cultural institutions, drawing affluent professionals and international residents.

    Average Property Price - SW7

    £1,951,944

    99

    National percentile

    Average Net Household Income - SW7

    £76,239

    100

    National percentile

    10-Year Annualised Price Growth - SW7

    -1.5%

    1

    National percentile

    10-Year Annualised Rent Growth - SW

    3.2%

    11

    National percentile

    View full analysis for SW7

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