Planning application
18 Seymour Street London W1H 7HU
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Details of vaults waterproofing method pursuant to Condition 7 of listed building consent dated 8 August 2023 (RN: 23/02367/LBC)
As published by the council, reference 26/01286/ADLBC
Application record
- Reference
- 26/01286/ADLBC
- Type
- Approval of Details (ADLBC)
- Status
- Pending
- Received
- 2 Mar 2026
- Validated
- 2 Mar 2026
- Ward
- Marylebone
- Postcode
- W1H 7HU
Site history
Applications at this address on the Westminster register
This site has had 8 applications since 2025: 1 approved, 1 refused.
-
26/05164/ADLBC Decided
18 Seymour Street London W1H 7HU
Details of new vault doors pursuant to condition 3 of listed building consent dated 01 April 2026 (RN: 26/01486/LBC)
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26/05009/FULL Decided
18 Seymour Street London W1H 7HU
Installation of external lighting to the front entrance and front basement lightwell, entry touch panel and proximity reader within the reveal of the entrance doorway.
-
26/05010/LBC Decided
18 Seymour Street London W1H 7HU
Installation of external lighting to the front entrance and front basement lightwell, entry touch panel and proximity reader within the reveal of the entrance doorway.
-
26/03007/ADLBC Awaiting decision
18 Seymour Street London W1H 7HU
Details of the repairs and upgrading of the rear oriel window pursuant to condition 5 of listed building consent dated 8th August 2023 (RN:23/02367).
-
26/01486/LBC Granted
18 Seymour Street London W1H 7HU
Replacement of the structurally failing front basement lightwell wall, with repair and reinstatement of railings and plinth stones; the introduction of a concealed structural backing wall (Stepoc blocks reinforced with concrete) and a lime-bedded reclaimed brick-facing wall.
-
25/07393/ADLBC Refused
18 Seymour Street London W1H 7HU
Details of method of waterproofing of the vaults pursuant to Condition 7 of listed building consent dated 8th August 2023 (RN:23/02367/LBC)
-
25/06157/LBC Awaiting decision
18 Seymour Street London W1H 7HU
Repair strategy for the preservation of existing ceilings
Timeline
Dates from the published record
-
2 Mar 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 27 April 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 66 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Latitude Architects Agent, an architecture practice
5 applications on PlanIndex
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
7 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 condition discharge and variation applications in a median of 42 days. More in our guide to how long planning decisions take.
About condition discharge and variation applications
This application deals with conditions on an existing permission, supplying the details a condition requires or asking to vary or remove one, without reopening the permission itself. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
18 Seymour Street London W1H 7HU
90% historically approved · decision due ~2 Jul
Details of the repairs and upgrading of the rear oriel window pursuant to condition 5 of listed building consent dated 8th August 2023 (RN:23/02367).
Awaiting decision Conditions Windows or glazing 10 docs -
18 Seymour Street London W1H 7HU
89% historically approved · decision due ~24 Sep
Details of new vault doors pursuant to condition 3 of listed building consent dated 01 April 2026 (RN: 26/01486/LBC)
Decided -
18 Seymour Street London W1H 7HU
Details of method of waterproofing of the vaults pursuant to Condition 7 of listed building consent dated 8th August 2023 (RN:23/02367/LBC)
Refused Conditions 12 docs -
18 Seymour Street London W1H 7HU
87% historically approved · decision due ~21 Sep
Installation of external lighting to the front entrance and front basement lightwell, entry touch panel and proximity reader within the reveal of the entrance doorway.
Decided Full applications 12 docs -
18 Seymour Street London W1H 7HU
90% historically approved · decision due ~21 Sep
Installation of external lighting to the front entrance and front basement lightwell, entry touch panel and proximity reader within the reveal of the entrance doorway.
Decided Heritage and listed buildings 1 doc -
18 Seymour Street London W1H 7HU
Replacement of the structurally failing front basement lightwell wall, with repair and reinstatement of railings and plinth stones; the introduction of a concealed structural backing wall (Stepoc blocks reinforced with concrete) and a lime-bedded reclaimed brick-facing wall.
Granted Heritage and listed buildings 16 docs
Other condition discharge and variation applications
In Westminster
-
26/04860/ADLBC Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Details of external and internal signage strategy pursuant to Condition 7(E) of listed building consent dated 12th February 2021 (RN: 19/07816/LBC)
-
26/04843/ADLBC Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Detailed design and specification of new blinds to NZH based on mock-up trials on-site pursuant to Condition 6(m) of listed building consent dated 12th February 2021 (19/07816/LBC).
-
26/05026/ADLBC Awaiting decision
St James's Park The Mall London SW1A 1AA
Details of method statement for re-carving works pursuant to condition 3(i) of listed building consent dated 16 July 2026 (RN: 26/03399/LBC)
-
26/04850/ADLBC Awaiting decision
17 Belgrave Square London SW1X 8PG
Detailed drawings of garage doors, roof lantern and any new lighting and flooring in the principal rooms pursuant to condition 6 (iii) (iv) (v) of listed building 18th August 2025 (RN:25/03417/LBC)
-
25/07120/ADLBC Granted
72 - 74 Lancaster Gate London W2 3NH
Details of new and altered doors and door architraves, including external faces of lifts (detailed elevations and sections at 1:10) pursuant to Condition 3 (A) of Listed Building Consent dated 14 December 2023 (RN: 23/00772/LBC) (Linked app: 25/07088/ADFULL)