« Sold prices in SW7
23, ONSLOW SQUARE, LONDON, KENSINGTON AND CHELSEA, GREATER LONDON, SW7 3NJ £2,825,000
Last sale price
Approximate location (postcode centre). Map data © OpenStreetMap contributors.
Local planning constraints Conservation area Thurloe/Smith's Charity Listed buildings 2 nearby outlines
Planning designations from planning.data.gov.uk and Environment Agency flood-risk data, © Crown copyright and database right, under the Open Government Licence v3.0. Coverage is incomplete and depends on the local authority — absence here does not guarantee a property is unaffected. Always check official sources.
Schools nearby The nearest 10 schools within 10 miles, by straight-line distance from the postcode centre. These are not catchment areas — admissions depend on each school’s criteria, so check with the local council .
Primary · Council-maintained · ages 5–11 · Roman Catholic ·
website Ofsted, Sept 2023: Outstanding
All-through · Independent · ages 2–19 ·
website Independent schools are inspected by Ofsted or the ISI — school record Primary · Council-maintained · ages 0–11 ·
website Ofsted, Sept 2024 — graded by area, no overall grade:
Quality of education: Outstanding Behaviour: Outstanding Personal development: Outstanding Leadership: Outstanding
All-through · Independent · ages 4–19 · Girls only ·
website Independent schools are inspected by Ofsted or the ISI — school record Secondary · Independent · ages 14–20 ·
website Independent schools are inspected by Ofsted or the ISI — school record Primary · Independent · ages 2–11 · Selective (grammar) · Girls only ·
website Independent schools are inspected by Ofsted or the ISI — school record Primary · Academy · ages 4–11 · Roman Catholic ·
website Ofsted, Dec 2023 (as predecessor school) : Good
Primary · Independent · ages 2–11 ·
website Independent schools are inspected by Ofsted or the ISI — school record All-through · Independent · ages 4–12 · Girls only ·
website Independent schools are inspected by Ofsted or the ISI — school record All-through · Independent · ages 4–13 · Selective (grammar) · Boys only · Roman Catholic ·
website Independent schools are inspected by Ofsted or the ISI — school record School details from Get Information About Schools (Department for Education). Inspection outcomes from Ofsted management information as at 30 September 2026; check the latest report on Ofsted’s website. Since November 2025 Ofsted report cards grade each area separately and give no overall grade. © Crown copyright, licensed under the Open Government Licence v3.0.
How this compares Averages cover every recorded sale in SW7 3NJ (2015–2025) and are not adjusted for house-price changes over that period — where the market has risen, older sales pull the average below today’s values, so treat this as a rough guide rather than a like-for-like comparison.
£5,064,333
Average in SW7 3NJ (2015–2025)
£5,064,333
Average on ONSLOW SQUARE (2015–2025)
-44%
below postcode average
Full transaction history This address covers more than one registered unit or interest (for example separate flats, or a leasehold and the freehold). The Property column shows each one. These are separate Land Registry entries, not repeat sales of one home.
Property Date sold Price paid Property type Tenure New build FLAT 2, 23 1 November 2024 £2,825,000 Flat/Maisonette Leasehold No FLAT 3, 23 19 May 2023 £2,800,000 Flat/Maisonette Leasehold No FLAT 3, 23 4 August 2017 £2,750,000 Flat/Maisonette Leasehold No FLAT 2, 23 30 March 2017 £2,720,000 Flat/Maisonette Leasehold No
Recent sales nearby £2,750,000
FLAT 2, 11, ONSLOW SQUARE, LONDON, KENSINGTON AND CHELSEA, GREATER LONDON, SW7 3NJ
Flat/Maisonette Nov 2025
£560,000
FLAT 12, 25, ONSLOW SQUARE, LONDON, KENSINGTON AND CHELSEA, GREATER LONDON, SW7 3NJ
Flat/Maisonette Oct 2024
£3,600,000
FLAT 1, 17, ONSLOW SQUARE, LONDON, KENSINGTON AND CHELSEA, GREATER LONDON, SW7 3NJ
Flat/Maisonette Aug 2022
£2,300,000
FLAT 1, 1, ONSLOW SQUARE, LONDON, KENSINGTON AND CHELSEA, GREATER LONDON, SW7 3NJ
Flat/Maisonette Mar 2021
£40,000,000
GARAGE, ONSLOW SQUARE, LONDON, KENSINGTON AND CHELSEA, GREATER LONDON, SW7 3NJ
Other Jan 2017
£4,400,000
19, ONSLOW SQUARE, LONDON, KENSINGTON AND CHELSEA, GREATER LONDON, SW7 3NJ
Flat/Maisonette Mar 2016
More sold prices in SW7 Sold prices in LONDON