Planning application
11 Cambridge Street London SW1V 4PP
Works: Extension Loft or dormer Windows or glazing Domestic
Read from the description, not a valuation. How we read the register
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Amendments to planning permission dated 20th March 2025 (RN 23/07877/FULL) for: Erection of mansard roof extension to existing dwelling at first and second floors level including raised chimney, double glazed timber sash window and other associated works namely, infill of small indent to rear facade up to the upper parapet level.
As published by the council, reference 26/01735/NMA
Application record
- Reference
- 26/01735/NMA
- Type
- Non-material amendments
- Status
- Pending
- Received
- 18 Mar 2026
- Validated
- 18 Mar 2026
- Ward
- Pimlico North
- Postcode
- SW1V 4PP
Timeline
Dates from the published record
-
18 Mar 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 13 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 66 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
MacAusland Design Ltd Agent, a design practice registered in London
Active · incorporated 2014 · London
6 applications on PlanIndex · across 2 councils
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 amendment applications in a median of 54 days. More in our guide to how long planning decisions take.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
21 Cambridge Street London SW1V 4PR
1 x Magnolia (T1, rear): Prune back overhanging limb into No.23 by shortening up to 2m at suitable growth points in line with boundary wall.
Granted Trees 7 docsSmall domestic -
27 Eccleston Square London SW1V 1NZ
Crack remedial measures including removal of damaged plaster and render, installation of Helifix bars and angle ties for structural reinforcement, and application of expanded metal lath for re-rendering. Internally, repair of damaged plaster in rear extensions and kitchen/lobby areas, reinstatement of laminate flooring, and specified painting works. Externally, inspection and repair of cracks, removal of ivy, re-rendering affected area
Granted Heritage and listed buildings Extension 30 docs -
29 Cambridge Street London SW1V 4PR
Installation of a 2 storey rear glazed infill extension at lower ground and ground floor level, installation of steps in front light well, alterations to windows throughout and installation of solar panels at main roof level.
Granted Full applications Extension Windows or glazing 23 docs -
29 Cambridge Street London SW1V 4PR
Internal and external alterations including the installation of a 2 storey rear glazed infill extension at lower ground and ground floor level, installation of steps in front light well, alterations to windows throughout and installation of solar panels at main roof level.
Granted Heritage and listed buildings Extension Windows or glazing 16 docs -
29 Eccleston Square London SW1V 1NZ
Replacement of existing double french doors and connected windows to first floor front balcony, with double glazed doors and windows to match. (Linked with 25/05399/LBC)
Granted Full applications Windows or glazing 20 docs -
29 Eccleston Square London SW1V 1NZ
Replacement of existing roof with new roof tiles to match existing.
Granted Heritage and listed buildings Roofing 18 docs
Other amendment applications
In Westminster
-
26/06232/NMA Awaiting decision
37 Trevor Place London SW7 1LE
Amendments to planning permission dated 17th July 2026 (RN 26/03030/FULL) for the Alterations including enlargement of louvres and installation of new plant in basement; landscaping of roof terrace; second floor windows replaced with door sets; partial demolition at ground and first floor levels to create new lightwell and landscaped courtyard. NAMELY, addition of a free-standing sauna to the second-floor roof terrace.
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26/06256/NMA Awaiting decision
Queens Court Queensway London W2 4QN
Amendments to planning permission dated 21st May 2026 (RN:25/05013/FULL) for Variation of conditions 1, 3, 8, 9 and 17 of planning permission dated 11th May 2022 (RN 18/09765/FULL) for the Change of use of rear part of Queensway Market to Retail, Financial and Professional services, Office and Restaurant (within Class E) use and 5 residential units facing Princes Court, reconfiguration of retail units along Queensway including introduction of Retail uses at Nos.23 and 33 (current entrances to Queensway Market) and use of Nos.25 and 41-43 Queensway as Restaurant uses, installation of new shopfronts to Nos.23 to 43 Queensway 23-43, erection of infill extension to rear at ground floor level, erection of two new pavilion structures for Retail use and associated new hard and soft landscaping on land between Queens Court and Princes Court, installation of green roofs, rooflights and mechanical plant within enclosures to first floor level roofs between projecting rear wings of Queens Court installation of kitchen extract ducts to rear elevations, and associated cycle parking, waste storage, plant and other ancillary alterations ('Application 2'). Namely, to vary the hours of operation for the refrigeration plant controlled by condition 6.
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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.
-
26/06201/NMA Awaiting decision
Almack House 28 King Street St James's London SW1Y 6QW
Amendments to planning permission dated 16th April 2026 (RN:26/01487/FULL) for Installation of a mechanical plant at lower ground floor and installation of two grilles to two lower ground floor windows, namely change to approved grille.
-
26/06212/NMA Awaiting decision
10 - 11 Lancaster Gate London W2 3LH
Amendment to Condition 12 (Whole Life Carbon) of planning permission dated 19th April 2024 (RN 23/04044/FULL) for Change of use from hotel to residential use (Class C3) with associated internal alterations to create 11 new units and external alterations comprising reconfiguration and recladding of the rear extension and restoration of the existing building. Namely to include additional requirement to evidence and justify where benchmarks cannot be achieved, consider mitigation measures and if none, evidence that all mitigation measures have been exhausted. (Linked with RN 26/06213/ADFULL)