Planning application
19 Cumberland Street London SW1V 4LS
Works: Extension Loft or dormer Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Detailed Drawings of new external windows and doors; new dormer window showing relationship with the roof and new rear extensions including materials specification pursuant to condition 4 a, b, c of planning permission dated 10th March 2026 (RN 25/08960/FULL)
As published by the council, reference 26/03499/ADFULL
Application record
- Reference
- 26/03499/ADFULL
- Type
- Approval of Details (Full PP)
- Status
- Pending
- Received
- 28 May 2026
- Validated
- 28 May 2026
- Ward
- Pimlico South
- Postcode
- SW1V 4LS
Site history
Applications at this address on the Westminster register
This site has had 4 applications since 2025: 1 approved, 0 refused.
-
26/06251/NMA Awaiting decision
19 Cumberland Street London SW1V 4LS
Amendments to planning permission dated 20th March 2026 (RN:25/08960/FULL) for Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment, namely the change of conservatory gable roof to a flat GRP roof.
-
26/03969/FULL Decided
19 Cumberland Street London SW1V 4LS
Installation of air conditioning unit and associated acoustic housing located at roof level.
-
25/08960/FULL Granted
19 Cumberland Street London SW1V 4LS
Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment.
Timeline
Dates from the published record
-
28 May 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 23 July 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 65 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
AA Drafting Solutions Agent, a design practice registered in London
Active · incorporated 2012 · London
75 applications on PlanIndex · across 18 councils · 82% 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
10 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.
Trade members open them 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 full applications in a median of 89 days. More in our guide to how long planning decisions take.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
19 Cumberland Street London SW1V 4LS
93% historically approved · decision due ~6 Nov
Amendments to planning permission dated 20th March 2026 (RN:25/08960/FULL) for Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment, namely the change of conservatory gable roof to a flat GRP roof.
Awaiting decision Amendments Extension Loft or dormer +2 -
19 Cumberland Street London SW1V 4LS
87% historically approved · decision due ~11 Aug
Installation of air conditioning unit and associated acoustic housing located at roof level.
Decided Full applications -
19 Cumberland Street London SW1V 4LS
Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment.
Granted Full applications Extension Loft or dormer +2 33 docs -
9 Cumberland Street London SW1V 4LS
Use of a ground floor unit as a studio flat.
Refused Lawful development 17 docs -
Cumberland Court Cumberland Street London SW1V 4LR
87% historically approved · decision due ~8 May
Variation of condition 1 of planning permission dated 10th July 2012 (RN 12/03613/FULL) which itself varied condition 1 of planning permission dated 25 November 2010 (RN: 10/02562) for: "Erection of single storey extension at fourth floor roof level in connection with provision of one residential flat, and erection of lift shaft within internal lightwell from basement to fourth floor leve". NAMELY, amendments to allow internal layout alterations; the introduction of new slot windows; change in external material from the approved aluminium composite cladding to a silicone render of a similar colour; and alteration to the roof form raising the roof height adjacent to the party walls to and a reduction in overhang.
Awaiting decision Full applications Extension Windows or glazing 27 docsSmall domestic -
65 Winchester Street London SW1V 4NU
1 x sycamore (T1): crown reduce by approx. 2-3m; to previous most recent reduction points.
Granted Trees 7 docs
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26/06295/FULL Awaiting decision
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Installation of a new shopfront.
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26/06297/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Alterations to rear elevation at basement level comprising repolacement window and installation of double opening door.
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26/06234/FULL Awaiting decision
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Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))
-
26/06249/FULL Awaiting decision
53 Wimpole Street London W1G 8YH
Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06250/LBC)
-
26/03576/FULL Decided
15A Devonshire Terrace London W2 3DW
Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)