3 St James's Square Westminster SW1Y 4JU
Alterations to the St. James's Square facade including replacement of windows and entrances, at main roof level addition of roof pavilion extension, plant equipment and enclosures, with roof terraces at eight and ninth floor levels and a rear extension to accommodate a lift shaft and associated works.
Tracking, tags and letters are part of the paid plan. See what it costs. Searching and reading any record stays free.
Progress
Application details
- Reference
- 26/00858/FULL
- Local authority
- Westminster
- Postcode
- SW1Y 4JU
- Ward
- SJW_22
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 12 Feb 2026
- Validated
- 12 Feb 2026
- Comments close
- 14 Apr 2026
- Target decision
- 9 Apr 2026
- Decided
- 19 May 2026
Estimated project value
£615k–£1020k
Based on the 252m² of floor area stated in the application, at inner London rates (2026). Source: FMB / Checkatrade 2026, single-storey extension £1,800-£3,000/m².
Floor area gained: 252.3m²
Recently sold nearby
Nothing on this postcode has changed hands in the last two years. The sales below are for pricing rather than a lead.
- 8 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Leasehold · Not a standard market sale · £200,0002 years ago4 Oct 2024
- FOURTH FLOOR PREMISES, 8 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Leasehold · Not a standard market sale · £612,5173 years ago4 Aug 2023
- 5 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Not a standard market sale · £77,000,0005 years ago7 Sept 2021
- 5 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Leasehold · Not a standard market sale · £77,000,0005 years ago7 Sept 2021
- 7 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Not a standard market sale · £45,250,0007 years ago7 Jun 2019
- 7 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Not a standard market sale · £36,500,0009 years ago3 Jul 2017
- THIRD FLOOR, 8 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Leasehold · Not a standard market sale · £1,499,2359 years ago29 Jun 2017
- LOWER GROUND FLOOR, 5 ST JAMES'S SQUARE, LONDON, SW1Y 4JUOther · Leasehold · Not a standard market sale · £77,0709 years ago24 May 2017
Contains HM Land Registry data © Crown copyright and database right 2024. 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
- 3 St James's Square Westminster SW1Y 4JUPermittedNext door
- 3 St James's Square Westminster SW1Y 4JUPermittedNext door
- 3 St James's Square Westminster SW1Y 4JUPermittedNext door
- St James's Square City Of Westminster SW1Y 4JUPermittedNext door
- 4 St James's Square Westminster SW1Y 4JUPendingAdjoining
- St James's Square Westminster SW1Y 4LDPermittedAdjoining