Chatham House 10 St James's Square London SW1Y 4LE Data via plota.co.uk

26/03269/LBC - Listed Building Consent Application Approved
Extensions & alterationsListed buildingsCommercial premises

Proposal

Removal of internal partition wall in the office spaces at second floor level. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
18 May 2026
✓
Approved
14 Jul 2026

Approved on 14 Jul 2026 · Delegated Decision · Last checked 29 Jul 2026

Documents 12

Decision & officer reports 2

PDF GRANT OF LISTED BUILDING CONSENT [PE] Decision Notice · 14 Jul 2026 View ↗ PDF DELEGATED REPORT Report · 14 Jul 2026 View ↗

Statements & assessments 1

PDF COVER LETTER INCL. HERITAGE STATEMENT AND DAS Background Papers · 18 May 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 18 May 2026 View ↗

Consultation & comments 2

PDF HISTORIC ENGLAND Consultee Comment · 24 Jun 2026 View ↗ PDF CNSLT-CONSULTEE CLOUD STD Background Papers · 8 Jun 2026 View ↗

Other documents 6

PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 8 Jun 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 8 Jun 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 22 May 2026 View ↗ PDF CH2-PDP-XX-XX-DR-A-00001-P1 Background Papers · 18 May 2026 View ↗ PDF CH2-PDP-XX-02-DR-A-01001-P1 Background Papers · 18 May 2026 View ↗ PDF CH2-PDP-XX-02-DR-A-03001-P1 Background Papers · 18 May 2026 View ↗

All documents on the council site ↗

Site constraints 10

Grade I listed: Chatham House
List entry 1264939 · 9 m from the pin · 37 more listed buildings within 150 m (3 Grade I, 9 Grade II*, 25 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 37 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 Named permitted development rights are withdrawn here.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.
Registered park or garden 39 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 ↗
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.
Also on the record
Inside the City of Westminster built-up area; Priority habitat 41 m away: Deciduous woodland.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England 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
Listed Building Consent Application
Postcode
SW1Y 4LE
Received
18 May 2026
Validated
18 May 2026
Ward
St James's
Case officer
Show
Target decision
13 Jul 2026
Decision
Application Permitted
Decision date
14 Jul 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Pegasus Group

How this decision compares

Decided in 57 days from validation, 4 days slower than Westminster's median of 53 for extensions. Approved, as 87% of extensions here are.

62%decided within 8 weeks
87%approved
930decided in the last year

Plota live figures for extensions decided by Westminster in the last twelve months, from validation. Westminster decision record →

Consultation & key dates

Alt. reference
PP-14926846
Site or press notice
17 Jun 2026
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2025 Approved
Remedial structural works to the lightwell and basement vault.
25/05354/LBC
2021 Approved
Removal and replacement of rainwater pipes and gutters. Removal and like for like replace…
21/06191/LBC
2021 Approved
Removal and replacement of rainwater pipes and gutters. Removal and like for like replace…
21/06190/FULL
2019 Approved
Internal refurbishment works including lighting installation throughout both buildings ba…
19/07184/LBC
2019 Approved
Replacement of two existing condenser units and installation of a new condenser unit at f…
19/03792/LBC
2019 Approved
Replacement of two existing condenser units and installation of a new condenser unit at f…
19/03791/FULL
2019 Withdrawn
Plasterwork repairs within the main staircase
19/05288/LBC
2019 Withdrawn
Internal refurbishment works at basement, ground and first floor levels.
19/03009/LBC
2016 Approved
Variation of Condition 1 of planning permission dated 25 July 2016 (RN: 16/04844/FULL) fo…
16/10401/FULL
2016 Approved
Variation of Condition 1 of planning permission dated 1 October 2016 (RN: 15/05933/FULL)…
16/04844/FULL
2016 Withdrawn
Details pursuant to Conditions 1, 2, 3, 4, 5, 6 and 7 (not inc. Part a) of planning permi…
16/03475/ADFULL
Within ~100m

Nearby activity

2025 Approved
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Regulation 5 Notice of Intention to Install Fixed Line Broadband Apparatus to a Listed Bu…
25/05203/TELNOT
2025
14 St James's Square London SW1Y 4LG
Installation of a new lift shaft within the existing lightwell providing access to all le…
25/03510/LBC
2025
14 St James's Square London SW1Y 4LG
Installation of a new lift shaft within existing lightwell providing access to all levels…
25/03509/FULL
2024
14 St James's Square London SW1Y 4LG
External alterations including replacement of existing plant equipment and rooflights; in…
24/06485/FULL
2024
14 St James's Square London SW1Y 4LG
Internal refurbishment and alterations at ground and basement level; external alterations…
24/06486/LBC
2024 Approved
95 Jermyn Street London SW1Y 6JE
Display of non-illuminated mesh and vinyl advertisements on hoardings measuring 2.44m x 0…
24/04433/ADV
2024
103-105 Jermyn Street London SW1Y 6EE
RECONSULTATION: Amendments to proposed roof terrace and balconies, facades and Daylight &…
24/02152/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
2024 Approved
95 Jermyn Street London SW1Y 6JE
Replacement of one window to front elevation at third floor level.
24/00086/FULL
2023 Approved
95 Jermyn Street London SW1Y 6JE
Works of repair and restoration to the external elevations and roof including brickwork c…
23/06749/LBC
2022 Approved
7 St James's Square London SW1Y 4JU
Internal at all levels to reconfigure layouts and external alterations to the eastern lig…
22/03422/LBC
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
5 St James's Square London SW1Y 4JU
Alterations to the existing secondary staircase to allow for strengthening works to the b…
22/05946/LBC
2018 Approved
Open Space Centre Of St James's Square London SW1Y 4LD
T1 1 x cherry: fellT2 1 x Sorbus: crown clean and lift over road up to 3mT3 and T4 2 x ch…
18/06821/TPO
2018 Approved
Open Space Centre Of St James's Square London SW1Y 4LD
T5 1 x hawthorn: fellT6 1 x Malus: reduce canopy by 20-30% pruning back to suitable growt…
18/08148/TPO
2018 Approved
89 Jermyn Street London SW1Y 6JH
Display for a temporary period of six months of a non-illuminated estate agent board loca…
18/06147/AD7
2018 Approved
12 St James's Square London SW1Y 4LB
Internal alterations to existing rear extension, in connection with a new internal fit ou…
18/07303/LBC
2018 Approved
7 St James's Square London SW1Y 4JU
Variation of condition 1 of listed building consent dated 08 September 2014 (RN: 14/01446…
18/05381/LBC
Westminster
Planning Authority Score
3.5/10
Below average
#221 of 296 councils
Relevant to this application:
Other 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