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 91 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 81 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
-
50 Hugh Street London SW1V 4ER
Erection of a single storey extension at rear upper ground floor level
Granted Full applications Extension 12 docsSmall domestic -
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
Other amendment applications
In Westminster
-
26/07459/NMA Awaiting decision
1 Hanover Square London W1S 1HA
Amendments to planning pemrission dated 10 October 2025 (RN: 25/01558/FULL) for the: Partial demolition, refurbishment and extension of the existing building to provide a sub-basement, basement, ground plus eight storey building; infilling and stepped rear extension; excavation of a new sub-basement level; installation of new plant equipment at basement and roof level; terraces at fourth, fifth, sixth, seventh and eighth floor levels; soft and hard landscaping; reprovision of car parking; new cycle parking facilities; and associated external works. Use of the building for retail and/or restaurant (Class E) on part ground floor and office (Class E) on all other floors. NAMELY, to allow alterations to the design of the ground floor frontages on Hanover Square and St George Street.
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26/07438/NMA Awaiting decision
29 - 31 Hill Street London W1J 5LS
Amendments to planning permission dated 1st July 2025 (RN 25/01006/FULL) for the external alterations at roof level including the creation of Level 04 roof terrace for use in association with existing office (Class E), replacement and installation of new plant and landscaping, replacement of windows, introduction of louvres, removal and replacement of rooflights, installation of new rooflight and other associated works. NAMELY, for alterations comprising of the removal of window sash boxes and weights, changes to the window mullion arrangement, the removal of two sash windows, the installation of secondary glazing, the removal of existing chamber hatch and installation of extract vent and integrated bench, the external replacement of rainwater goods and hoppers, the removal of bricks and installation of airbricks, minor demolition works, replacement of roof covering, removal of ductwork, roof plant rearrangement, the installation of a new external door to plant area, minor layout alterations and other associated works.
-
26/07389/NMA Decided
Flat 1 5 Grittleton Road London W9 2DD
Amendments to planning permission dated 04 June 2025 (RN: 25/02022/FULL), NAMELY, amendment of Condition 4 to correct the property address from 9 Aldridge Road Villas to Flat 1 5 Grittleton Road.
-
26/07377/NMA Awaiting decision
60 Ledbury Road London W11 2AJ
Amendments to planning permission dated 2nd October 2025 (RN 25/04018/FULL) for the Partial demolition, refurbishment, and erection of a mansard roof extension to form a new third floor with dormers to front, side and rear elevations; to form 6 flats (Class C3) on upper floors; external plant equipment and ductwork; lower ground floor excavation to increase floor to ceiling height; replacement windows; cycle parking and associated external alterations; use of the part ground floor and lower ground floor as retail and restaurant (Class E). Site includes 60-68 Ledbury Road) NAMELY, An amendment to the basement and ground floor drawing reference numbers; amendment to the description of development, in reference to restaurant and or retail use; and amendments to C
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26/07375/NMA Awaiting decision
77 Hereford Road London W2 5BB
Amendments to planning permission dated 4th August 2026 (RN 26/03970/FULL) for the Replacement of roof terrace access stair with glazed hatch, new timber decking and front and rear roof railings to roof terrace, with infilling side window of closet wing. NAMELY, Hinged hatch access substituted by sliding hatch.