45 Berkeley Square Westminster W1J 5AS
Internal and external alterations to 45 Hays Mews and 45 Berkeley Square, including excavation of basement beneath 45 Hay's Mews and central courtyard, alterations at roof level of 45 Hay's Mews, upward extension of the central courtyard to create an additional floor, replacement of the courtyard pavilion to provide a glazed walkway, the provision of a retractable glazed roof, improved access arrangements, internal layout changes and associated works.
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Progress
Application details
- Reference
- 21/06462/LBC
- Local authority
- Westminster
- Postcode
- W1J 5AS
- Ward
- WEC_02
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 20 Sept 2021
- Validated
- 20 Sept 2021
- Comments close
- 29 Oct 2021
- Target decision
- 15 Nov 2021
- Decided
- 15 Jun 2022
Estimated project value
£2440k–£3660k
Based on the 452m² of floor area stated in the application, at inner London rates (2026). Source: trade estimate, basement £4,000-£6,000/m².
Floor area gained: 452m²
Recently sold nearby
New owners, recently moved in. First work on a house usually follows within months of completing. 8 recent sales are listed below.
- 48N BERKELEY SQUARE, LONDON, W1J 5AXFlat or maisonette · Leasehold · Not a standard market sale · £900,0005 months ago16 Mar 2026
- 34 BERKELEY SQUARE, LONDON, W1J 5BFOther · Leasehold · Not a standard market sale · £22,600,0007 months ago16 Jan 2026
- FLAT 2, GARRICK HOUSE CARRINGTON STREET, LONDON, W1J 7AFFlat or maisonette · Leasehold · £632,0008 months ago12 Dec 2025
- FLAT 4, 33 HILL STREET, LONDON, W1J 5LTFlat or maisonette · Leasehold · £2,320,0009 months ago25 Nov 2025
- FLAT 202, CARRINGTON HOUSE HERTFORD STREET, LONDON, W1J 7RGFlat or maisonette · Leasehold · Not a standard market sale · £1,225,00010 months ago27 Oct 2025
- FLAT 1, AUDLEY COURT, 32 - 34 HILL STREET, LONDON, W1J 5NPFlat or maisonette · Leasehold · £4,100,00010 months ago17 Oct 2025
- 48D BERKELEY SQUARE, LONDON, W1J 5AXFlat or maisonette · Leasehold · £5,488,00011 months ago30 Sept 2025
- 41 FARM STREET, LONDON, W1J 5RPOther · Leasehold · Not a standard market sale · £1,967,55812 months ago21 Aug 2025
Homes here go for about £3,210,000 — the median of the last 4 market sales in W1J (the wider postcode district), £632,000 to £5,488,000.
Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0. Sales are matched by postcode, not by property, so a sale listed here may be a neighbouring address. England and Wales only.
Planning constraints
No designations recorded at this location. This is not a formal search — always confirm with the local authority before relying on it.
Designations from planning.data.gov.uk, Open Government Licence v3.0. Indicative only — not a formal local authority search.
Nearby applications
- 45 Berkeley Square Westminster W1J 5ASRefusedNext door
- 45 Berkeley Square Westminster W1J 5ASRefusedNext door
- 44 Hay's Mews 45 Berkeley Square Westminster W1J 5QDPermittedNext door
- 45 Berkeley Square Westminster W1J 5ASUnknownNext door
- 45 Berkeley Square Westminster W1J 5ASPermittedNext door
- 44 Berkeley Square Westminster W1J 5ARPermittedNext door