25 - 26 Wimpole Street London W1G 8GL Data via plota.co.uk

26/05750/FULL - Full Planning Permission Application Pending
Extensions & alterations

Proposal

Replacement of existing rear windows and French doors with double-glazed windows and French doors. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
21 Aug 2026
Decision
Expected by 16 Oct 2026

This application is under consideration - no decision has been issued yet. Plota predicts a decision soon after comments close on 28 Oct 2026, from Westminster's recent extensions. Comments are open until 28 Oct 2026.

Comment on this application ↗

Documents 11

Statements & assessments 1

PDF DESIGN, ACCESS, PLANNING, HERITAGE AN SUSTAINABILITY STATEMENT Design and Access Statement · 22 Aug 2026 View ↗

Plans & drawings 2

PDF LOCATION PLAN Drawing · 21 Aug 2026 View ↗ PDF REAR ELEVATION (EXISTING, REMOVAL & PROPOSED) Drawing · 21 Aug 2026 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 21 Aug 2026 View ↗ PDF FEECALCULATION Background Papers · 21 Aug 2026 View ↗

Other documents 6

PDF 2ND INVALID LETTER Background Papers · 23 Sept 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 26 Aug 2026 View ↗ PDF 1ST INVALID LETTER Background Papers · 26 Aug 2026 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 21 Aug 2026 View ↗ PDF PROPOSED REAR WINDOW SPECIFICATION Background Papers · 21 Aug 2026 View ↗ PDF COVERING LETTER Background Papers · 21 Aug 2026 View ↗

All documents on the council site ↗

Site constraints 7

Grade II listed: 24, Wimpole Street W1
List entry 1066089 · 12 m away · 69 more listed buildings within 150 m (5 Grade II*, 64 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 69 with distances
Historic England ↗
Harley Street 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 Named permitted development rights are withdrawn here.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.
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 ↗
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; Town centre 72 m away: Marylebone High Street.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 27 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
Full Planning Permission Application
Postcode
W1G 8GL
Received
21 Aug 2026
Validated
21 Aug 2026
Ward
Marylebone
Case officer
Show
Target decision
16 Oct 2026
Applicant
Show
Agent
Howard de Walden Estates Limited

Decision outlook

Day 45 of the 56-day target. Westminster usually decides extensions by day 55.

Day 4524 days to the predicted decision (day 69)
56%decided within 8 weeks
88%approved
1,672decided 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.

34 neighbours consulted · Last counted 3 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15136492
Comments by
28 Oct 2026
Site or press notice
7 Oct 2026
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
45 New Cavendish Street London W1G 9TJ
Internal alterations at ground and lower ground level including reinstatement of staircas…
25/07902/LBC
2025
45 New Cavendish Street London W1G 9TJ
Use of part of the lower ground floor for retail purposes (Class E). (Linked with 25/0790…
25/07901/FULL
2025 Approved
Hahnemann House 32 Welbeck Street London W1G 8EU
Display for a temporary period of six months of a non-illuminated 'to let' board attached…
25/06276/AD7
2025 Refused
30 Queen Anne Street London W1G 8HX
Erection of an infill extension at basement and ground floor level, Installation of a new…
25/05505/FULL
2025
43 - 49 Harley Street London W1G 8BT
Installation of support beam to facilitate failing beam at ground floor level (45 Harley…
25/06693/LBC
2025
Hahnemann House 32 Welbeck Street London W1G 8EU
Installation of CCTV to front entrance and rear emergency exit. (Retropsective) Linked wi…
25/06098/LBC
2025
Hahnemann House 32 Welbeck Street London W1G 8EU
Installation of CCTV to front entrance and rear emergency exit. (Retrospective) Linked wi…
25/06097/FULL
2025 Refused
Hahnemann House 32 Welbeck Street London W1G 8EU
Installation of CCTV to front entrance and rear emergency exit. (Retrospective, linked wi…
25/04216/FULL
2025 Refused
Hahnemann House 32 Welbeck Street London W1G 8EU
Installation of CCTV to front entrance and rear emergency exit. ((Retrospective, Linked w…
25/04217/LBC
2025 Approved
2 Wimpole Mews London W1G 8PE
Replacement of existing garage door with window at ground floor level to the front facade…
25/03973/LBC
2025 Approved
2 Wimpole Mews London W1G 8PE
Replacement of existing garage door with window at ground floor level to the front facade…
25/03972/FULL
2025 Approved
69 Wimpole Street London W1G 8AS
Installation of 2no. wall mounted air source heat pumps within an acoustic enclosure at r…
25/03649/FULL
2025 Approved
69 Wimpole Street London W1G 8AS
Installation of 2no. air source heat pumps within an acoustic enclosure.
25/03650/LBC
2025
11 Marylebone Mews London W1G 8PX
Creation of an additional floor via the erection of a mansard roof and extension of an ex…
25/03462/FULL
2025 Approved
43 - 49 Harley Street London W1G 8BT
Repositioning of four air conditioning condenser units in the inner light-well and at the…
25/01884/FULL
2025
57 Harley Street London W1G 8QS
Relocation of the residential (Class C3) space from the part ground and basement floors t…
25/02646/FULL
2025
50 Queen Anne Street London W1G 9LA
Installation of new air source heat pump to existing plant enclosure to rear roof; format…
25/02536/LBC
2025
50 Queen Anne Street London W1G 9LA
Installation of new air source heat pump to existing plant enclosure and roof light to re…
25/02535/FULL
2025
Hahnemann House 32 Welbeck Street London W1G 8EU
Installation of CCTV to front and rear entrances (Linked with 25/01795/FULL, Retrospectiv…
25/01796/LBC
2025
Hahnemann House 32 Welbeck Street London W1G 8EU
Installation of CCTV to front and rear entrances. (Linked with 25/01796/LBC, Retrospectiv…
25/01795/FULL
2020 Approved
Ground Floor 30 Queen Anne Street London W1G 8HZ
Erection of an extension at lower ground and ground floor level within rear lightwell. Er…
20/06419/FULL
2020 Approved
6 Wimpole Mews London W1G 8PE
Demolition behind retained front first floor facade, excavation to enlarge basement, and…
20/04180/FULL
2020 Approved
68 Wimpole Street London W1G 8AR
T1: Goat Willow: Re-pollard back to previous reduction points.
20/04476/TCA
2020 Approved
30 Wimpole Street London W1G 8GR
Repair works to roof including removal and reinstatement of slates, installation of vapou…
20/03193/LBC
2020 Approved
6 Marylebone Mews London W1G 8PX
Installation of replacement doors and roller shutters and installation of new external li…
20/02847/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