93 Mortimer Street London W1W 7SS Data via plota.co.uk

25/05432/LBC - Listed Building Consent Application Approved
Listed buildings

Proposal

Installation of two extract ducts routed internally to terminate at main roof level; an inwards opening gate on Great Portland Street and two skylights; internal alterations. (Linked to 25/04893/FULL.) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
1 Aug 2025
✓
Approved
29 Sept 2025

Approved on 29 Sept 2025 · Delegated Decision · Last checked 31 Oct 2026

Documents 15

Decision & officer reports 2

PDF GRANT OF LISTED BUILDING CONSENT [PE] Decision Notice · 29 Sept 2025 View ↗ PDF DELEGATED REPORT Report · 29 Sept 2025 View ↗

Statements & assessments 3

PDF SUSTAINABLE DESIGN STATEMENT 23.07.2025 Background Papers · 1 Aug 2025 View ↗ PDF HERITAGE JULY 2025 APP2 Heritage Statement · 1 Aug 2025 View ↗ PDF DESIGN & ACCESS STATEMENT Design and Access Statement · 1 Aug 2025 View ↗

Plans & drawings 4

PDF EXISTING DRAWINGS Drawing · 1 Aug 2025 View ↗ PDF PROPOSED DRAWINGS Drawing · 1 Aug 2025 View ↗ PDF LOCATION PLAN Drawing · 1 Aug 2025 View ↗ PDF VENTILATION SERVICES LAYOUT PLANS Drawing · 16 Jul 2025 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 1 Aug 2025 View ↗ PDF FEECALCULATION Background Papers · 1 Aug 2025 View ↗

Other documents 4

PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 22 Aug 2025 View ↗ PDF RECEIPT OF APPLICATION Other · 12 Aug 2025 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 1 Aug 2025 View ↗ PDF COVER LETTER 1 Background Papers · 1 Aug 2025 View ↗

All documents on the council site ↗

Associated applications 2

Site constraints 11

Grade II listed: 43, GREAT PORTLAND STREET W1 (See details for further address information)
List entry 1267276 · The pin is inside its outline · 24 more listed buildings within 150 m (1 Grade I, 1 Grade II*, 22 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 24 with distances
Historic England ↗
East Marylebone 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.
Protected view corridor: 4A.2 Primrose Hill summit to the Palace of Westminster
Inside the landmark viewing corridor of a protected vista. A building that rises above the corridor's threshold height should be refused. How high that is depends on where along the view the site is.
The London Plan (policy HC4) designates strategic views, and the Mayor's London View Management Framework (March 2012) gives 13 of them a protected vista toward St Paul's Cathedral, the Palace of Westminster or the Tower of London. A vista has a threshold height that rises or falls with the line of sight. In the landmark viewing corridor, a building above it would harm the view and should be refused. In the wider setting consultation area around the corridor, a building above it is referred for consultation and its effect on the view is judged. The threshold changes along each view and is set out in the framework. A revised framework is out for consultation until 4 December 2026 and is not yet in force.
London View Management Framework ↗
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.
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
National infrastructure project 1477 m away: Thames Tideway Tunnel; 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 1 November 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.

Building

Floor area1,460 m² (15,715 sq ft)
Energy ratingB (asset rating 44)
UseOffices and Workshop Businesses
HeatingAir Conditioning

From the energy performance certificate lodged in May 2024, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Westminster
Application type
Listed Building Consent Application
Postcode
W1W 7SS
Received
1 Aug 2025
Validated
1 Aug 2025
Ward
West End
Case officer
Show
Target decision
26 Sept 2025
Decision
Application Permitted
Decision date
29 Sept 2025
Decision level
Delegated Decision
Applicant
Show
Agent
Langdale Planning Limited

How this decision compares

Decided in 59 days from validation, about the council's usual 57 days. Approved, as 90% of listed building works here are.

49%decided within 8 weeks
90%approved
2,227decided in the last year

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

Public comments

No public comments yet.

Last counted 31 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14225201
Planning Portal ref
PP-14225201
Comments by
24 Sept 2025
Site or press notice
3 Sept 2025
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2025 Approved
Installation of two extract ducts and two new skylights on roof; an inwards opening gate…
25/04893/FULL
2025 Approved
Internal fit out works.
25/04624/LBC
2025
Details of how waste is stored on site and how materials for recycling will be stored sep…
25/03210/ADFULL
2025
Dual use of 93 Mortimer Street and 43 Great Portland Street as artistic/cultural centre w…
25/00590/FULL
2023 Approved
Internal alterations at all floor levels, replacement of the roof tiles on 43 Great Portl…
23/01360/LBC
2023 Approved
Internal alterations at all floor levels, replacement of the roof tiles on 43 Great Portl…
23/01359/FULL
2022 Approved
Alterations to the Great Portland Street facade, installation of plant in two lightwells…
22/03798/LBC
2022 Approved
Alterations to the Great Portland Street facade, installation of plant in two lightwells…
22/03797/FULL
2022 Approved
External repairs and alterations including the replacement of roof slates, provision of n…
22/00761/FULL
2022 Approved
External repairs and alterations including the replacement of roof slates, provision of n…
22/00764/LBC
2020 Approved
Installation of like for like replacement glazing panes to the existing 10 glazed domes a…
20/04429/LBC
2019 Approved
Internal alterations including removal of mezzanine; installation of new service riser an…
19/06698/LBC
2019 Approved
Repairs to the external elevations and roof of the building, removal of all internal part…
19/01239/LBC
2017 Approved
Details of a supplementary acoustic report pursuant to condition 11 of planning permissio…
17/06992/ADFULL
2017
Details of how waste is going to be stored on the site and how materials for recycling wi…
17/06418/ADFULL
2017 Approved
Minor internal alterations at ground floor level, including the widening of internal door…
17/02023/LBC
Within ~100m

Nearby activity

2025
318 - 322 Regent Street London W1B 3BL
Display of one non illuminated black flag with white text logo measuring 2.4m x 1.2m. Lin…
25/08178/ADV
2025
318 - 322 Regent Street London W1B 3BL
Installation of flagpole on East elevation of Morley house. Linked with 25/08178/ADV.
25/08099/LBC
2025
23 - 25 Great Portland Street London W1W 8QD
Installation of new external rear ductwork in lightwell including replacement of part sho…
25/07439/FULL
2025 Approved
318 - 322 Regent Street London W1B 3BL
External refurbishment including replacement of external awnings present on the exterior…
25/05885/LBC
2025 Approved
318 - 322 Regent Street London W1B 3BL
External refurbishment including replacement of external awnings present on the exterior…
25/05884/FULL
2025 Approved
67 Mortimer Street London W1W 7SE
Installation of public art on the flank wall of number 67 Mortimer Street.
25/05691/FULL
2025
Marcol House 289 - 293 Regent Street London W1B 2HJ
Variation of condition 4 of planning permission dated 08 January 2024 (RN: 23/07854/FULL)…
25/07205/FULL
2025
14 Little Portland Street London W1W 8BN
Application for the partial demolition, reconfiguration and refurbishment and extension o…
25/06949/FULL
2025
Ground Floor 52 - 53 Margaret Street London W1W 8SQ
Display of externally new illuminated signage is proposed for front facade, along with a…
25/06430/ADV
2025 Approved
Ground Floor 14 - 15 Langham Place London W1B 2QS
Display of internally illuminated fascia sign measuring 1.875m X 0.45m, internally illumi…
25/03536/ADV
2025 Withdrawn
318 - 322 Regent Street London W1B 3BL
Installation of awnings at ground floor level to the Regent Street, Mortimer Street and L…
25/03696/LBC
2025 Withdrawn
318 - 322 Regent Street London W1B 3BL
Installation of awnings at ground floor level to the Regent Street, Mortimer Street and L…
25/03695/FULL
2025 Approved
42 - 48 Great Portland Street London W1W 7LZ
Display of an internally illuminated projecting sign measuring 0.5m X 0.5m.
25/03839/ADV
2025 Approved
318 - 322 Regent Street London W1B 3BL
Display of a non-illuminated fascia sign measuring 1.59m x 0.40m.
25/03220/ADV
2025 Withdrawn
318 - 322 Regent Street London W1B 3BL
Installation of awnings to exterior of Morley House and Albany.
25/03214/LBC
2025 Approved
Mortimer Street London
Display of 'The Leftovers Love Seat' outside 63-65 Mortimer Street for a temporary period…
25/01906/ADV
2025
14 - 15 Langham Place London W1B 2QS
Installation of assorted steelwork to support the relocation of one antenna aperture and…
25/01544/TELCOM
2024
32 - 36 Great Portland Street London W1W 8QX
Display of internally illuminated fascia sign measuring 1.61m X 0.36 and internally illum…
24/08163/ADV
2024
32 - 36 Great Portland Street London W1W 8QX
Display of halo illuminated (letters only) fascia measuring 2.65m x 0.60m (split decision)
24/07596/ADV
2024
32 - 36 Great Portland Street London W1W 8QX
Display of an internally illuminated (letters and logo only) hanging signs measuring 0.60…
24/07448/ADV
2020 Approved
Henry Wood House 2 Riding House Street London W1W 7FA
Recladding facades to replace existing granite and mosaic tiling and associated landscapi…
20/07702/FULL
2020 Approved
68 Great Portland Street London W1W 7NG
Display for a temporary period of six months of a non-illuminated estate agent board loca…
20/07662/AD7
2020 Approved
70-74 Great Portland Street London W1W 7NQ
Dual / alternative use of the lower ground and ground floors for either medical (Class E)…
20/06621/FULL
2020 Approved
17 Little Portland Street London W1W 8BP
Installation of a replacement shopfront.
20/05105/FULL
2020 Approved
61 Great Portland Street London W1W 7LL
Display of one non-illuminated fascia sign measuring 0.35m x 2.54m and one non-illuminate…
20/05360/ADV
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

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

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.