Washington House 40 - 41 Conduit Street London W1S 2YQ Data via plota.co.uk

26/06665/CLEUD - Certificate of Lawfulness (existing) Pending
Admin / proceduralCommercial premises

Proposal

Confirmation that material operations comprised in the development granted planning permission on 29 September 2023 (Ref: ) lawfully began before the expiry of the three year time period. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
29 Sept 2026
Decision
Expected by 24 Nov 2026

Under consideration

No decision has been issued yet. A decision is expected by 24 Nov 2026.

Documents 11

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 29 Sept 2026 View ↗

Other documents 10

PDF RECEIPT OF APPLICATION Other · 5 Oct 2026 View ↗ PDF PROPOSAL Photo · 29 Sept 2026 View ↗ IMG WORKS 1 - DOORWAY COLUMN Photo · 29 Sept 2026 View ↗ IMG WORKS 1 - NEW COLUMN AND BEAM IN BASEMENT Photo · 29 Sept 2026 View ↗ IMG WORKS 1 - NEW COLUMN IN BASEMENT Photo · 29 Sept 2026 View ↗ IMG WORKS 2 - OPENING OF LIFTS Photo · 29 Sept 2026 View ↗ IMG WORKS 3 - STAIRS TO MEZZANINE 2 Photo · 29 Sept 2026 View ↗ IMG WORKS 3 - STAIRS TO MEZZANINE Photo · 29 Sept 2026 View ↗ IMG WORKS 3 - STAIRS TO MEZZANINE 1 Photo · 29 Sept 2026 View ↗ IMG WORKS 3 - STAIRS TO MEZZANINE 3 Photo · 29 Sept 2026 View ↗

All documents on the council site ↗

Associated applications 2

  • Part of

    FullApprovedcouncil archive
    • LawfulnessConfirmation that material operations comprised in the development granted planning permission…This application26/06665/CLEUD

Site constraints 10

Mayfair 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 Named permitted development rights are withdrawn here.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.
49 listed buildings within 150 m
Nearest: 42 and 43, Conduit Street W1, Grade II, 9 m away · 1 Grade I, 6 Grade II*, 42 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 49 with distances
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.
National infrastructure project 1003 m away: Thames Tideway Tunnel
The site is 1003 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, 505 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
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 6 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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Other new applications on this street

29 Sept 2026Pending

Basement And Ground Floor 14 - 15 Conduit Street London W1S 2XJ

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23 Sept 2026Pending

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11 Sept 2026Pending

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3 Sept 2026Approved

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3 Sept 2026Pending

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Important details

Council
Westminster
Application type
Certificate of Lawfulness (existing)
Postcode
W1S 2YQ
Received
29 Sept 2026
Validated
29 Sept 2026
Case officer
Show
Target decision
24 Nov 2026
Agent
hgh Consulting
Freehold owner
Show

Public comments

No public comments yet.

Last counted 6 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15101160
Planning Portal ref
PP-15101160
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2025
Use of basement and part ground floor as dual alternative restaurant or retail (Class E)…
25/07055/FULL
2024
Confirmation of that permission dated 31 May 2022 (RN: 22/02483/FULL) has commenced and b…
24/04493/CLEUD
2024
Erection of a 7th storey extension with front terrace to provide additional hotel floorsp…
24/00612/FULL
2023 Approved
Use of basement and part ground floor as dual alternative restaurant or retail (Class E)…
23/03930/FULL
2022 Approved
Variation of conditions 3 and 4 of planning permission dated 7th September 2021 (RN:21/02…
22/02483/FULL
Within ~100m

Nearby activity

2025 Approved
20 Conduit Street London W1S 2XW
Installation of replacement ground floor primary office entrance door; Retention of fanli…
25/06305/LBC
2025 Approved
20 Conduit Street London W1S 2XW
Installation of replacement ground floor primary office entrance door; Retention of fanli…
25/06304/FULL
2025 Withdrawn
9 Clifford Street London W1S 2FT
Installation of Front Facade Lighting. (Linked to 25/05357/LBC)
25/05356/FULL
2025 Withdrawn
9 Clifford Street London W1S 2FT
Installation of Front Facade Lighting. (Linked to 25/05356/FULL)
25/05357/LBC
2025 Approved
9 Clifford Street London W1S 2FT
Display of illuminated Christmas decorations on the front elevation for a temporary perio…
25/05874/ADV
2025 Approved
9 Clifford Street London W1S 2FT
Display of illuminated Christmas decorations on the front elevation for a temporary perio…
25/05851/LBC
2025 Approved
9 Clifford Street London W1S 2FT
Installation of security bars on lower ground floor windows at the front and rear elevati…
25/05353/LBC
2025 Approved
9 Clifford Street London W1S 2FT
Installation of security bars on lower ground floor windows at the front and rear elevati…
25/05352/FULL
2025
Basement To Second Floor 17 - 20 New Bond Street London W1S 2RB
Display of externally illuminated festive decorations measuring 5.9m x 49m along Clifford…
25/06619/ADV
2025 Approved
28 New Bond Street London W1S 2RJ
Display of externally illuminated Christmas garlands framing the store front window measu…
25/05999/ADV
2025
9 Clifford Street London W1S 2FT
Installation of Security Cameras at Front and Rear Elevations (Linked to 25/06368/FULL)
25/06369/LBC
2025
9 Clifford Street London W1S 2FT
Installation of Security Cameras at Front and Rear Elevations (Linked to 25/06369/LBC)
25/06368/FULL
2025
26 - 27 Conduit Street London W1S 2XX
Reinstatement of four windows at fifth floor level on the Conduit Street elevation.
25/06184/FULL
2025 Approved
28 New Bond Street London W1S 2RJ
Display of four externally illuminated festive crossings, festive gateways and festive no…
25/05344/ADV
2025 Approved
Basement And Ground Floor And Mezzanine 45 Conduit Street London W1S 2YN
Display for a temporary period of six months of a non-illuminated estate agent board loca…
25/05054/AD7
2025
6 - 7 Clifford Street London W1S 2FT
Upward extension of the existing plant enclosure at roof level; relocation of plant equip…
25/03578/FULL
2025
9 Clifford Street London W1S 2FT
Display of one non illuminated projecting sign measuring 0.4m x 0.3m and one non illumina…
25/03457/ADV
2025
9 Clifford Street London W1S 2FT
Display of non-illuminated plaque and blade sign to front facade. Linked with 25/03457/ADV
25/03268/LBC
2025
20 Conduit Street London W1S 2XW
Rear extension of an existing fifth floor plant room converted into office space (E use)…
25/02292/LBC
2025
20 Conduit Street London W1S 2XW
Rear extension of an existing fifth floor plant room converted into office space (E use)…
25/02291/FULL
2022
West End Central Police Station 27 Savile Row London W1S 2EX
Demolition of former police station building, excavation to create new basement 2 level a…
22/07647/FULL
2022 Approved
28 New Bond Street London W1S 2RJ
Display of externally illuminated temporary Christmas garland framing measuring 6m x 4m.
22/06507/ADV
2022 Approved
52 - 53 Conduit Street London W1S 2YX
Display of two non-illuminated black vinyl applied to white painted plasterboard behind s…
22/06792/ADV
2022
Basement To Second Floor 17 - 20 New Bond Street London W1S 2RB
Display of temporary externally illuminated Christmas decoration to the facade of the bui…
22/05932/ADV
2022 Approved
Third Floor 16 Clifford Street London W1S 3RG
Internal subdivision of office on the third floor.
22/05310/LBC
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 owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.