Planning application
64 - 65 St James's Street London SW1A 1NF
Works: Extension Loft or dormer Demolition Windows or glazing
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Amendments to planning permission dated 2 September 2021 (RN: 21/02158/FULL) for: Demolition of the existing mansard roof and removal of plant and escape stair; erection of new double mansard roof extension and rear extension for additional commercial floorspace (Use Class E); and installation of new escape stair, rear balconies, roof terrace and associated works namely; increase in height of internal stair core roof; solid hinged access hatch with integrated glazed AOV replaced with sliding glazed access rooflight and separate glazed AOV.
As published by the council, reference 26/00434/NMA
Application record
- Reference
- 26/00434/NMA
- Type
- Non-material amendments
- Status
- Decided
- Decision
- Granted As published: Application Permitted
- Received
- 26 Jan 2026
- Validated
- 26 Jan 2026
- Decided
- 13 Mar 2026
- Ward
- St James's
- Decision by
- Delegated Decision
- Postcode
- SW1A 1NF
Site history
Applications at this address on the Westminster register
This site has had 3 applications since 2022: 2 approved, 0 refused.
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26/02528/ADFULL Decided
64 - 65 St James's Street London SW1A 1NF
Details of how waste is to be stored on site, pursuant to condition 18 of planning permission dated 2nd September 2021 (RN 21/02158/FULL)
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22/04890/NMA Granted
64 - 65 St James's Street London SW1A 1NF
Amendments to planning permission dated 2 September 2021 (RN: 21/02158/FULL) for 'Demolition of the existing mansard roof and removal of plant and escape stair; erection of new double mansard roof extension and rear extension for additional commercial floorspace (Use Class E); and installation of new escape stair, rear balconies, roof terrace and associated works'. Namely, reduction in height of the internal stair core roof to line through with the height of the lift overruns, removal of the 3rd floor oversailing balcony and associated fixed screen and door to the new infill extension and replacement of existing rear façade windows above Blue Ball Yard entrance within existing openings.
Timeline
Dates from the published record
-
26 Jan 2026
Received by Westminster
-
13 Mar 2026
Decision issued: Application Permitted
-
21 Jul 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Squire and Partners LLP Agent, registered in London
Active · incorporated 2013 · London
20 applications on PlanIndex · across 5 councils · 100% granted
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See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
27 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
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Open the documentsWhat this grant of permission means
Westminster granted permission on 13 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
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64 - 65 St James's Street London SW1A 1NF
Amendments to planning permission dated 2 September 2021 (RN: 21/02158/FULL) for 'Demolition of the existing mansard roof and removal of plant and escape stair; erection of new double mansard roof extension and rear extension for additional commercial floorspace (Use Class E); and installation of new escape stair, rear balconies, roof terrace and associated works'. Namely, reduction in height of the internal stair core roof to line through with the height of the lift overruns, removal of the 3rd floor oversailing balcony and associated fixed screen and door to the new infill extension and replacement of existing rear façade windows above Blue Ball Yard entrance within existing openings.
Granted Amendments Extension Loft or dormer +2 27 docs -
64 - 65 St James's Street London SW1A 1NF
Details of how waste is to be stored on site, pursuant to condition 18 of planning permission dated 2nd September 2021 (RN 21/02158/FULL)
Decided Full applications 3 docs -
Target House 66 St James's Street London SW1A 1NE
Installation of three air conditioning units and louvre acoustic screen at roof level.
Granted Full applications 6 docs -
Target House 66 St James's Street London SW1A 1NE
Display of externally illuminated projecting sign.
Granted Advertising 4 docs -
Target House 66 St James's Street London SW1A 1NE
Replacement of existing roof mounted air conditioning equipment.
Granted Full applications 10 docs -
Target House 66 St James's Street London SW1A 1NE
Details of acoustic screen and relationship to parapet wall pursuant to Condition 7 of planning permission dated 28 January 2008 (RN: 07/09938).
Granted Full applications 3 docs
Other amendment applications
In Westminster
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26/07459/NMA Awaiting decision
1 Hanover Square London W1S 1HA
Amendments to planning pemrission dated 10 October 2025 (RN: 25/01558/FULL) for the: Partial demolition, refurbishment and extension of the existing building to provide a sub-basement, basement, ground plus eight storey building; infilling and stepped rear extension; excavation of a new sub-basement level; installation of new plant equipment at basement and roof level; terraces at fourth, fifth, sixth, seventh and eighth floor levels; soft and hard landscaping; reprovision of car parking; new cycle parking facilities; and associated external works. Use of the building for retail and/or restaurant (Class E) on part ground floor and office (Class E) on all other floors. NAMELY, to allow alterations to the design of the ground floor frontages on Hanover Square and St George Street.
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26/07438/NMA Awaiting decision
29 - 31 Hill Street London W1J 5LS
Amendments to planning permission dated 1st July 2025 (RN 25/01006/FULL) for the external alterations at roof level including the creation of Level 04 roof terrace for use in association with existing office (Class E), replacement and installation of new plant and landscaping, replacement of windows, introduction of louvres, removal and replacement of rooflights, installation of new rooflight and other associated works. NAMELY, for alterations comprising of the removal of window sash boxes and weights, changes to the window mullion arrangement, the removal of two sash windows, the installation of secondary glazing, the removal of existing chamber hatch and installation of extract vent and integrated bench, the external replacement of rainwater goods and hoppers, the removal of bricks and installation of airbricks, minor demolition works, replacement of roof covering, removal of ductwork, roof plant rearrangement, the installation of a new external door to plant area, minor layout alterations and other associated works.
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26/07389/NMA Decided
Flat 1 5 Grittleton Road London W9 2DD
Amendments to planning permission dated 04 June 2025 (RN: 25/02022/FULL), NAMELY, amendment of Condition 4 to correct the property address from 9 Aldridge Road Villas to Flat 1 5 Grittleton Road.
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26/07377/NMA Awaiting decision
60 Ledbury Road London W11 2AJ
Amendments to planning permission dated 2nd October 2025 (RN 25/04018/FULL) for the Partial demolition, refurbishment, and erection of a mansard roof extension to form a new third floor with dormers to front, side and rear elevations; to form 6 flats (Class C3) on upper floors; external plant equipment and ductwork; lower ground floor excavation to increase floor to ceiling height; replacement windows; cycle parking and associated external alterations; use of the part ground floor and lower ground floor as retail and restaurant (Class E). Site includes 60-68 Ledbury Road) NAMELY, An amendment to the basement and ground floor drawing reference numbers; amendment to the description of development, in reference to restaurant and or retail use; and amendments to C
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26/07375/NMA Awaiting decision
77 Hereford Road London W2 5BB
Amendments to planning permission dated 4th August 2026 (RN 26/03970/FULL) for the Replacement of roof terrace access stair with glazed hatch, new timber decking and front and rear roof railings to roof terrace, with infilling side window of closet wing. NAMELY, Hinged hatch access substituted by sliding hatch.