14 St James's Square London SW1Y 4LG Data via plota.co.uk

26/01037/ADFULL - Approval of Details (Full PP) Approved
Admin / procedural

Proposal

Detailed drawings of acoustic enclosure pursuant to condition 5 of planning permission dated 18th December 2024 (RN:). Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
18 Feb 2026
✓
Approved
24 Mar 2026

Approved on 24 Mar 2026 · Delegated Decision · Last checked 24 Sept 2026

Documents 11

Decision & officer reports 2

PDF APPR. OF DETAILS-FULL RESMAT [PE] Decision Notice · 24 Mar 2026 View ↗ PDF DELEGATED REPORT Report · 24 Mar 2026 View ↗

Plans & drawings 1

PDF PROPOSED FIRST FLOOR PLAN Drawing · 18 Feb 2026 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 18 Feb 2026 View ↗ PDF FEECALCULATION Background Papers · 18 Feb 2026 View ↗

Other documents 6

PDF ACK-APPROVAL OF DETAILS APPL. Background Papers · 22 Mar 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 18 Mar 2026 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 18 Feb 2026 View ↗ PDF CONDITION 5 COVER LETTER Other · 18 Feb 2026 View ↗ PDF SITE PHOTOS ACOUSTIC ENCLOSURE AND COLOUR Photo · 18 Feb 2026 View ↗ PDF ENVIRON ELV ACOUSTIC ENCLOSURE 2024 Other · 18 Feb 2026 View ↗

All documents on the council site ↗

Associated applications 3

Site constraints 12

Grade II listed: London Library
List entry 1235825 · The pin is inside its outline · 40 more listed buildings within 150 m (6 Grade I, 7 Grade II*, 27 Grade II)
Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show the other 40 with distances
Historic England ↗
St James's conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
2 Article 4 directions
Article 4 Basement Development Permitted Rights Removed · Article 4 Direction Class E To C3 In Central Activities Zone. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Archaeological priority area: City of Westminster APA 2.5
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
Air quality management area: Westminster AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
Town centre: West End
A designated centre in the London Plan.
Shops, services and active frontages are protected in centres, and main town centre uses are steered here first.
National infrastructure project 455 m away: Thames Tideway Tunnel
The site is 455 m from the project boundary. Waste water treatment, decided. The project page says whether consent was granted. Also within 2 km: London Strategic Heat Main Project (at pre-application, 259 m).
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Central activities zone
The core of central London in the London Plan.
Offices, culture and the other strategic functions of the centre take priority over new housing here.
Registered park or garden 60 m away: St James's Square
Its setting is a consideration for work nearby.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
Historic England ↗
Also on the record
Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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Important details

Council
Westminster
Application type
Approval of Details (Full PP)
Postcode
SW1Y 4LG
Received
18 Feb 2026
Validated
18 Feb 2026
Ward
St James's
Case officer
Show
Target decision
15 Apr 2026
Decision
Application Permitted
Decision date
24 Mar 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Haworth Tompkins

Public comments

No public comments yet.

Last counted 24 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14713362
Planning Portal ref
PP-14713362
Env. assessment
No

Historical activity at this location

39 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2025
Detailed drawings and manufacturers specifications of of the new lourve to lower ground f…
25/07098/ADLBC
2025
Detailed drawings and manufacturers specifications of of the new lourve to lower ground f…
25/06988/ADFULL
2025
Installation of a new lift shaft within the existing lightwell providing access to all le…
25/03510/LBC
2025
Installation of a new lift shaft within existing lightwell providing access to all levels…
25/03509/FULL
2024
Internal refurbishment and alterations at ground and basement level; external alterations…
24/06486/LBC
2024
External alterations including replacement of existing plant equipment and rooflights; in…
24/06485/FULL
2021
Approval of details (21/02621/LBC)
21/04655/ADLBC
2021 Approved
Internal alterations and refurbishment works of two of the existing WCs located on levels…
21/02621/LBC
2017 Approved
Minor alterations to internal partitions and doors at The London Library.
17/11260/LBC
2017 Approved
Installation of three non-illuminated display boxes attached to the railings at The Londo…
17/05358/LBC
2017 Approved
Display of three non-illuminated display boxes attached to the railings at The London Lib…
17/05353/ADV
2017 Approved
Installation of two mobile phone booths in ground floor issue hall.
17/04122/LBC
2016 Refused
Display of non illuminated temporay sign (linked to 16/04020/LBC).
16/04019/ADV
2016 Refused
Display of non illuminated temporay sign (linked to 16/04019/ADV).
16/04020/LBC
Within ~100m

Nearby activity

2025
Telecommunications Mast 81 - 84 Jermyn Street London
Removal of 6 existing antennas to be replaced with 8 new antennas (overall antenna height…
25/07465/FULL
2025 Approved
Chatham House 10 St James's Square London SW1Y 4LE
Remedial structural works to the lightwell and basement vault.
25/05354/LBC
2025 Approved
31 King Street Covent Garden London WC2E 8JD
Display of non-illuminated vinyls to windows.
25/03815/LBC
2025 Approved
12 St James's Square London SW1Y 4LB
Regulation 5 Notice of Intention to Install Fixed Line Broadband Apparatus to a Listed Bu…
25/05203/TELNOT
2025 Approved
44 Duke Street St James's London SW1Y 6DD
Display of one non illuminated high level banner on white painted steel flag pole measuri…
25/04734/ADV
2024 Approved
Ryder Court 14 Ryder Street London SW1Y 6QB
Erection of single storey cycle parking pod within carpark, and associated works.
24/03110/FULL
2024
81 Jermyn Street London SW1Y 6JF
Internal and external refurbishment, comprising of works to the Jermyn Street entrance, D…
24/03521/FULL
2023 Approved
11 - 12 St James's Square London SW1Y 4LB
Replacement and installation of new plant at roof and basement level and three plant scre…
23/02582/FULL
2022 Approved
Ryder Court 14 Ryder Street London SW1Y 6QB
Replacement of window with door, lowering of window sills and installation of platform li…
22/08649/FULL
2023 Approved
Bray House Duke Of York Street London SW1Y 6JX
Retention of replacement staircase and security sensor lighting to rear escape stairwell.
23/00765/FULL
2023
11 - 12 St James's Square London SW1Y 4LB
Office enhancements, including internal alterations to main entrance, reception and atriu…
23/04635/LBC
2023
11 - 12 St James's Square London SW1Y 4LB
Refurbishment and alterations to main entrance, reception and atrium areas, improvements…
23/04634/FULL
2023 Approved
11 - 12 St James's Square London SW1Y 4LB
Various internal refurbishment works to existing rear office extension area from ground f…
23/01136/LBC
2023 Withdrawn
Ames House 6 Duke Of York Street London SW1Y 6LA
The construction of a fully glazed winter garden over the existing outdoor terrace area.
23/00499/FULL
2023
11 - 12 St James's Square London SW1Y 4LB
Replacement of roof and basement level plant equipment and enclosure at roof level; lands…
23/02583/LBC
2023 Approved
12 St James's Square London SW1Y 4LB
Installation of brass plaque located on pilaster adjacent to main entrance.
23/00553/LBC
2022 Approved
12 St James's Square London SW1Y 4LB
Display of a non-illuminated bronze plaque measuring 25cm x 35cm
22/08226/ADV
2022 Approved
11 Duke Street St James's London SW1Y 6BN
Internal alterations associated with fire proofing stairwell on all levels.
22/06768/LBC
2022 Approved
Cleveland House 33 King Street St James's London SW1Y 6RJ
Installation of plant located at roof level.
22/03527/FULL
2022 Approved
83 Jermyn Street London SW1Y 6JD
Display of externally illuminated fascia signs measuring 0.375m x 1.04 and 0.23 x 0.2m an…
22/05247/ADV
2019 Approved
19 St James's Square London SW1Y 4JE
Alterations to the front entrance including replacement door, paving and column cladding…
19/04025/FULL
2019 Approved
12 St James's Square London SW1Y 4LB
Internal alterations to lower ground floor level, in connection with a new internal fit o…
19/01680/LBC
2019 Withdrawn
Chatham House 10 St James's Square London SW1Y 4LE
Internal refurbishment works at basement, ground and first floor levels.
19/03009/LBC
2019 Approved
2-4 King Street St James's London SW1Y 6QL
Replacement of existing frameless glazed entrance doors with framed glazed entrance doors.
19/01488/FULL
2018 Approved
81-84 Jermyn Street London SW1Y 6JF
Replacement of six antennas and equipement cabinets with twelve antennas, one 600m diamet…
18/10890/FULL
Westminster
Planning Authority Score
3.5/10
Below average
#221 of 296 councils
Relevant to this application:
Householder decisions

Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.

One of the strictest councils
only 81% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Westminster decision statistics
Based on MHCLG data, the year to March 2026
86%
Overall approval rate
Below avg (87%) #201 of 296
81%
Householder approved
Below avg (90%) #277 of 296
44%
Decided in 8 weeks
Below avg (63%) #258 of 296
28%
Extended time limit
Below avg (41%) #46 of 296
83%
Minor dwellings approved
12 decided (1-9 homes)
67%
Major dwellings approved
3 decided (10+ homes)
81%
Change of use approved
133 decided
4,602
Total decisions
648 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use