16 - 18 Wilfred Street London SW1E 6PL Data via plota.co.uk

26/06795/CLOPUD - Certificate of Lawfulness (proposed) Pending
Extensions & alterations

Proposal

Replacement of 23 existing single-glazed timber vertical sliding sash windows on the front and rear elevations of the dwellinghouse with new painted timber vertical sliding sash windows with slimline double-glazed units. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
5 Oct 2026
Decision
Expected by 30 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 25 Nov 2026 and 4 Dec 2026, from Westminster's recent extensions.

Documents 12

Statements & assessments 1

PDF 1456-LDC-DOC-02 STATEMENT OF LAWFULNESS Background Papers · 5 Oct 2026 View ↗

Plans & drawings 7

PDF 1456-LDC-001 SITE LOCATION PLAN AND SITE PLAN Location Plan · 5 Oct 2026 View ↗ PDF 1456-LDC-DOC-03 WINDOW SCHEDULE Drawing · 5 Oct 2026 View ↗ PDF 1456-LDC-202 PROPOSED TYPICAL SASH SECTIONS Drawing · 5 Oct 2026 View ↗ PDF 1456-LDC-100 EXISTING AND PROPOSED FRONT ELEVATION Drawing · 5 Oct 2026 View ↗ PDF 1456-LDC-101 EXISTING AND PROPOSED REAR ELEVATION Drawing · 5 Oct 2026 View ↗ PDF 1456-LDC-200 WINDOW TYPES EXISTING AND PROPOSED Drawing · 5 Oct 2026 View ↗ PDF 1456-LDC-201 EXISTING TYPICAL SASH SECTIONS Drawing · 5 Oct 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 5 Oct 2026 View ↗

Other documents 3

PDF RECEIPT OF APPLICATION Other · 8 Oct 2026 View ↗ PDF 1456-LDC-DOC-05 PHOTOGRAPHIC RECORD Photo · 5 Oct 2026 View ↗ PDF 1456-LDC-COVER LETTER Background Papers · 5 Oct 2026 View ↗

All documents on the council site ↗

Site constraints 14

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 ↗
13 listed buildings within 150 m
Nearest: Roman Catholic Church of St Peter and St Edward, Grade II, 16 m away · 1 Grade II*, 12 Grade II
The site itself is not listed. 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 all 13 with distances
Historic England ↗
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.
National infrastructure project 812 m away: Thames Tideway Tunnel
The site is 812 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, 272 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 ↗
Also on the record
Wider setting of protected view 9A.1 King Henry's Mound to St Paul's Cathedral; Registered park or garden 165 m away: St James's Park; Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square; Town centre 74 m away: Victoria Street.
Not affected
Not green belt · No scheduled monument at the site

Checked on 10 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
Certificate of Lawfulness (proposed)
Postcode
SW1E 6PL
Received
5 Oct 2026
Validated
5 Oct 2026
Ward
St James's
Case officer
Show
Target decision
30 Nov 2026
Applicant
Show
Agent
Unwin Jones Partnership

Decision outlook

Day 23 of the 56-day target. Westminster usually decides extensions by day 55.

Day 2333 days to the 56-day target
56%decided within 8 weeks
88%approved
1,688decided in the last year

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

Public comments

No public comments yet.

Last counted 25 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15274237
Planning Portal ref
PP-15274237
Env. assessment
No

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025
57A Catherine Place London SW1E 6DY
Replacement of the roof and front dormer; removal of the old roof access structure and cr…
25/06914/FULL
2025 Approved
20 Buckingham Gate London SW1E 6LB
Regulation 5 Notice of Intention to Install Fixed Line Broadband Apparatus to a Listed Bu…
25/06215/TELNOT
2025
63 Catherine Place London SW1E 6DY
Use of the building as four flats (Class C3) and alterations to lower ground floor front…
25/02939/FULL
2025
55 Catherine Place London SW1E 6DY
Use of first floor as commercial/office use. Installation of a flag pole between the firs…
25/01307/FULL
2024
27 Wilfred Street London SW1E 6PR
Installation of metal railings to perimeter of flat roof including one metal ladder with…
24/08814/FULL
2024
14 Buckingham Place London SW1E 6HX
Erection of mansard roof extension including concealed terrace to extend exsting single f…
24/08828/FULL
2024
30 Buckingham Gate London SW1E 6NN
Extension at fourth floor level to enclose existing terrace.
24/07256/FULL
2024
Beacon House Castle Lane London SW1E 6DW
The works we are applying for are: T15 Silver Birch ? Remove & replace T16 Cherry ? Remov…
24/06744/TCA
2024
8 Wilfred Street London SW1E 6PL
Installation of metal balustrade on mansard roof to allow for its use as a terrace. (RETR…
24/05737/FULL
2024
32 Catherine Place London SW1E 6HL
Replacement infill rear extension to lower ground floor and infill rear extension to grou…
24/04902/FULL
2024
35 Buckingham Gate London SW1E 6PA
Replacement of existing Crittall windows and balcony door sets with new double glazed Cri…
24/04707/FULL
2024
27 Wilfred Street London SW1E 6PR
Installation of metal railings with box planters to perimeter of main flat roof, new retr…
24/03431/FULL
2024 Approved
Flat 2 36 Buckingham Gate London SW1E 6PB
Replacement of existing sashes with acoustic double glazing.
24/00347/FULL
2024
Penthouse 41 35 Buckingham Gate London SW1E 6PA
Erection of extension at main roof level and alterations to fifth floor to convert pentho…
24/00663/FULL
2024 Approved
The View 20 Palace Street London SW1E 5BA
Installation of a telecommunications base station comprising 8 no antenna, 2 no dishes, t…
24/00430/TELNOT
2023 Approved
Development Site At North, South, Alexandra And Mews Buildings At Castle Lane And Palace Street London
Installation of two roof mounted television aerial and dish arrays and associated equipme…
23/01782/FULL
2023 Approved
Development Site At North, South, Alexandra And Mews Buildings At Castle Lane And Palace Street London
Display of non-illuminated hoarding measuring 2.44m x 128m
23/04114/ADV
2023 Withdrawn
1-2 Castle Lane London SW1E 6DR
Removal of third floor and plant enclosure and construction of part third and new part fo…
23/02922/FULL
2023 Refused
13 Catherine Place London SW1E 6DX
Installation of an air conditioning unit within an acoustic enclosure at roof level.
23/01134/FULL
2023 Approved
Flat 8 16 Catherine Place London SW1E 6HF
Rooftop external condenser unit within acoustic enclosure.
23/01617/FULL
2017 Approved
35 Buckingham Gate London SW1E 6PA
Installation of new water main up the external face of the rear elevation.
17/05361/FULL
2017 Refused
20 Wilfred Street London SW1E 6PL
Demolition of rear conservatory and outhouse and erection of four storey rear extension a…
17/05356/FULL
2017 Approved
21 Buckingham Gate London SW1E 6LB
Display for a temporary period of six months of a non-illuminated estate agent board loca…
17/06226/AD7
2017 Approved
23 Buckingham Gate London SW1E 6LB
Display for a temporary period of six months of a non-illuminated estate agent board atta…
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2017 Refused
51 Catherine Place London SW1E 6DY
Installation of replacement double glazed windows to the front elevations of nos. 51 and…
17/00958/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