21 Stafford Place London SW1E 6NP Data via plota.co.uk

25/08897/FULL - Full Planning Permission Application Approved

Proposal

Erection of mansard roof extension. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
8 Dec 2025
✓
Approved
17 Apr 2026

Approved on 17 Apr 2026 · Complex Delegated Decision · Last checked 3 Oct 2026

Documents 33

Decision & officer reports 2

PDF GRANT OF FULL PP [PE] Decision Notice · 17 Apr 2026 View ↗ PDF DELEGATED REPORT Report · 17 Apr 2026 View ↗

Statements & assessments 3

PDF DESIGN STATEMENT Design and Access Statement · 8 Dec 2025 View ↗ PDF HERITAGE STATEMENT Heritage Statement · 8 Dec 2025 View ↗ PDF FIRE STATEMENT Background Papers · 8 Dec 2025 View ↗

Plans & drawings 19

PDF PROPOSED SITE PLAN. Drawing · 24 Feb 2026 View ↗ PDF PROPOSED 2-F AND ROOF PLANS OPTION 1. Drawing · 24 Feb 2026 View ↗ PDF EXISTING WEST AND NORTH ELEVATIONS Drawing · 24 Feb 2026 View ↗ PDF PROPOSED WEST AND NORTH ELEVATIONS Drawing · 24 Feb 2026 View ↗ PDF PROPOSED SOUTH AND EAST ELEVATIONS Drawing · 24 Feb 2026 View ↗ PDF PROPOSED 3D STREET VIEW Drawing · 24 Feb 2026 View ↗ PDF EXISTING AND PROPOSED STREET ELEVATIONS Drawing · 24 Feb 2026 View ↗ PDF LOCATION PLAN Location Plan · 8 Dec 2025 View ↗ PDF EXISTING SITE PLAN Drawing · 8 Dec 2025 View ↗ PDF PROPOSED SITE PLAN Superseded document · 8 Dec 2025 View ↗ PDF EXISTING G/F AND 1/F PLANS Drawing · 8 Dec 2025 View ↗ PDF EXISTING ROOF PLAN Drawing · 8 Dec 2025 View ↗ PDF PROPOSED G/F AND 1/F PLANS Superseded document · 8 Dec 2025 View ↗ PDF EXISTING WEST AND NORTH ELEVATIONS Superseded document · 8 Dec 2025 View ↗ PDF EXISTING SOUTH AND EAST ELEVATIONS Drawing · 8 Dec 2025 View ↗ PDF PROPOSED WEST AND NORTH ELEVATIONS Superseded document · 8 Dec 2025 View ↗ PDF PROPOSED SOUTH AND EAST ELEVATIONS Superseded document · 8 Dec 2025 View ↗ PDF EXISTING AND PROPOSED STREET ELEVATIONS Superseded document · 8 Dec 2025 View ↗ PDF PROPOSED 2/F AND ROOF PLANS OPTION 1 Superseded document · 8 Dec 2025 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 8 Dec 2025 View ↗

Consultation & comments 2

PDF OBJECTION Objection Comment · 19 Mar 2026 View ↗ PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 12 Feb 2026 View ↗

Other documents 6

PDF RECEIPT OF APPLICATION Other · 12 Feb 2026 View ↗ PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 12 Feb 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 12 Feb 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 12 Feb 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 12 Feb 2026 View ↗ PDF PROPOSED 3D STREET VIEW Superseded document · 8 Dec 2025 View ↗

All documents on the council site ↗

Site constraints 10

Grade II listed: 14-20, Stafford Place Sw1
List entry 1236634 · 13 m away · 16 more listed buildings within 150 m (3 Grade I, 2 Grade II*, 11 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 16 with distances
Historic England ↗
Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Birdcage Walk 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 ↗
Article 4 direction
Article 4 Basement Development Permitted Rights Removed. 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 3.2
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 ↗
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 71 m away: Buckingham Palace
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.
Not affected
Not green belt · No scheduled monument at the site

Checked on 3 October 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
Full Planning Permission Application
Postcode
SW1E 6NP
Received
8 Dec 2025
Validated
8 Dec 2025
Ward
St James's
Case officer
Show
Target decision
17 Apr 2026
Decision
Application Permitted
Decision date
17 Apr 2026
Decision level
Complex Delegated Decision
Applicant
Show
Agent
HK HOME ARCHITECTS AND CONSULTANTS LTD

How this decision compares

Decided in 130 days from validation, 67 days slower than Westminster's median of 63 for full applications. Approved, as 86% of full applications here are.

42%decided within 8 weeks
86%approved
1,308decided in the last year

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

Public comments

3comments received
1 objecting2 neutral

33% object · below the UK average of 74%

85 neighbours consulted · Last counted 3 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14516025
Comments by
11 Mar 2026
Site or press notice
18 Feb 2026
Env. assessment
No
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