Planning application
20 Conduit Street London W1S 2XW
Works: Loft or dormer Roofing Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Internal alterations at fifth floor level, installation of two conservation style rooflights at roof level, installation of one rear casement window at fifth floor level, replacement of existing maintenance access door with new glazed door, replacement of damaged roof tiles and installation of insulation; and removal and installation of two new MVHR extract and intake roof cowls. (Linked to 26/02022/FULL)
As published by the council, reference 26/02023/LBC
Application record
- Reference
- 26/02023/LBC
- Type
- Listed Building Consent Application
- Status
- Pending
- Received
- 26 Mar 2026
- Validated
- 26 Mar 2026
- Ward
- West End
- Postcode
- W1S 2XW
Site history
Applications at this address on the Westminster register
This site has had 6 applications since 2025: 2 approved, 0 refused.
-
26/05636/ADFULL Decided
20 Conduit Street London W1S 2XW
Details of conservation rooflights, new rear door, and new rear window pursuant to condition 4 of planning permission dated 27.05.2026 (RN:26/02022/FULL). (Linked with 26/05630/ADLBC)
-
26/05630/ADLBC Decided
20 Conduit Street London W1S 2XW
Detailed drawings of the Conservation Rooflights, new Rear Door, and new rear window; Pursuant to condition 2 of Listed Building Consent dated 27th May 2026 (26/02023/LBC)
-
26/02022/FULL Awaiting decision
20 Conduit Street London W1S 2XW
Installation of two conservation style rooflights at roof level, installation of one rear casement window at fifth floor level, replacement of existing maintenance access door with new glazed door, replacement of damaged roof tiles and installation of insulation; and removal and installation of two new MVHR extract and intake roof cowls. (Linked to 26/02023/LBC)
-
25/06305/LBC Granted
20 Conduit Street London W1S 2XW
Installation of replacement ground floor primary office entrance door; Retention of fanlight and recolouring of building number signage and replacement of intercom. (Linked to 25/06304/FULL)
-
25/06304/FULL Granted
20 Conduit Street London W1S 2XW
Installation of replacement ground floor primary office entrance door; Retention of fanlight and recolouring of building number signage and replacement of intercom.(Linked to 25/06305/LBC)
Timeline
Dates from the published record
-
26 Mar 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 21 May 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Westminster took a median of 91 days over the applications it decided in the last year.
Related applications
Cases linked to this one on the register
1 later application on the register refers to this one:
-
26/05630/ADLBC Decided
20 Conduit Street London W1S 2XW
Detailed drawings of the Conservation Rooflights, new Rear Door, and new rear window; Pursuant to condition 2 of Listed Building Consent dated 27th May 2026 (26/02023/LBC)
Who's behind it
Company information only, from the register and Companies House
Savills (UK) Ltd Agent, registered in London
Active · incorporated 1991 · London
1,136 applications on PlanIndex · across 154 councils · 94% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
21 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Watch members (£5 a month) open the document list from here.
Open the documentsWhat happens while it is decided
This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 119 days. More in our guide to how long planning decisions take.
About heritage and listed building applications
Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
20 Conduit Street London W1S 2XW
Installation of replacement ground floor primary office entrance door; Retention of fanlight and recolouring of building number signage and replacement of intercom. (Linked to 25/06304/FULL)
Granted Heritage and listed buildings 13 docs -
20 Conduit Street London W1S 2XW
Installation of replacement ground floor primary office entrance door; Retention of fanlight and recolouring of building number signage and replacement of intercom.(Linked to 25/06305/LBC)
Granted Full applications 18 docs -
20 Conduit Street London W1S 2XW
89% historically approved · decision due ~13 Oct
Details of conservation rooflights, new rear door, and new rear window pursuant to condition 4 of planning permission dated 27.05.2026 (RN:26/02022/FULL). (Linked with 26/05630/ADLBC)
Decided Loft or dormer Windows or glazing -
20 Conduit Street London W1S 2XW
89% historically approved · decision due ~13 Oct
Detailed drawings of the Conservation Rooflights, new Rear Door, and new rear window; Pursuant to condition 2 of Listed Building Consent dated 27th May 2026 (26/02023/LBC)
Decided Loft or dormer Windows or glazing -
20 Conduit Street London W1S 2XW
88% historically approved · decision due ~21 May
Installation of two conservation style rooflights at roof level, installation of one rear casement window at fifth floor level, replacement of existing maintenance access door with new glazed door, replacement of damaged roof tiles and installation of insulation; and removal and installation of two new MVHR extract and intake roof cowls. (Linked to 26/02023/LBC)
Awaiting decision Full applications Loft or dormer Roofing +1 26 docs -
Sofia House 19 Conduit Street London W1S 2BH
89% historically approved · decision due ~14 Oct
Details of the pre-demolition audit in accordance with section 4.6 of the GLA's adopted Circular Economy; pursuant to condition 12 of Planning Permission dated 31 July 2026 (26/02841/FULL)
Awaiting decision Demolition
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