Planning application
20 Conduit Street London W1S 2XW
Works: Loft or dormer Windows or glazing
Relates to 26/02023/LBC
Decided. The decision notice on the council portal carries the outcome in full, including any conditions.
Proposal
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)
As published by the council, reference 26/05630/ADLBC
Application record
- Reference
- 26/05630/ADLBC
- Status
- Decided
- Received
- 18 Aug 2026
- Validated
- 18 Aug 2026
- 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.
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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)
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26/02023/LBC Awaiting decision
20 Conduit Street London W1S 2XW
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)
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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)
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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)
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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
-
18 Aug 2026
Received by Westminster
-
22 Aug 2026
Added to PlanIndex
-
5 Sep 2026
Status changed to Decided
Previously Pending.
Related applications
Cases linked to this one on the register
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26/02023/LBC Awaiting decision
20 Conduit Street London W1S 2XW
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)
1 later application on the register refers to this one:
-
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)
After the decision
Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.
About this record
The published feed does not state which type of application this is; the register entry on Westminster's portal will say. Our guide explains the common types.
Nearby applications
Within 500 metres
-
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
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
90% historically approved · decision due ~21 May
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)
Awaiting decision Heritage and listed buildings Loft or dormer Roofing +1 21 docs -
20 Conduit Street London W1S 2XW
87% 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