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Planning application

51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

Decided Kensington and Chelsea NMA/23/08151 Non-Material Amendments

Works: Extension Loft or dormer Demolition Windows or glazing

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

Non-material amendment to planning permission 23/02670 (Internal reconfiguration and refurbishment of hostel for long stays during the academic year and short stays out of the academic year; construction of mansard roof extension, and rear infill and closet wing extensions; creation of new internal level within rear closet wings; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West to provide bedrooms and ancillary space (amended description).) to allow changes to mansard knuckle point, lightwell fenestration and slit window of rear mews.

As published by the council, reference NMA/23/08151

Application record

Reference
NMA/23/08151
Type
Non-Material Amendments
Status
Decided
Decision
Accept Non-Material Amendment(s)
Received
12 Dec 2023
Validated
2 Jan 2024
Decided
15 Jan 2024
Ward
Courtfield
Parish
06
Postcode
SW7 2EH

Site history

Applications at this address on the Kensington and Chelsea register

This site has had 5 applications since 2023: 4 approved, 0 refused.

  • CON/25/04886 Granted

    51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

    Details required by condition 10 (cycle parking and storage facilities) of planning permission 23/05908 allowed under appeal ref: APP/K5600/W/24/3343334 (Variation of conditions 2 (compliance with approved drawings) and 20 (Sustainable Urban Drainage System (SuDS) - implementation) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment; construction of mansard roof extension; rear infill and closet wing extensions; creation of new internal level; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West) for addition of a mansard on approved reconstructed mews and dropping of sills on two windows on mews elevation, and amended working of condition 20 to state the following: During construction of the development hereby permitted the submitted Sustainable urban Drainage System (SuDS), prepared by Herrington Consulting Limited (dated March 2022) and the Addendum (dated August 2023) shall be fully implemented and maintained thereafter)

    Decided 6 Oct 2025 Conditions
  • CON/24/06866 Granted

    51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

    Details required by condition 22 (submission of details - section and elevation drawings of the mansard roof and dormers at Mews Building) of planning permission 23/05908 allowed under appeal ref: APP/K5600/W/24/3343334 (Variation of conditions 2 (compliance with approved drawings) and 20 (Sustainable Urban Drainage System (SuDS) - implementation) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment; construction of mansard roof extension; rear infill and closet wing extensions; creation of new internal level; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West) for addition of a mansard on approved reconstructed mews and dropping of sills on two windows on mews elevation, and amended working of condition 20 to state the following: During construction of the development hereby permitted the submitted Sustainable urban Drainage System (SuDS), prepared by Herrington Consulting Limited (dated March 2022) and the Addendum (dated August 2023) shall be fully implemented and maintained thereafter)

    Decided 21 Nov 2024 Conditions
  • CON/23/07102 Granted

    51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

    Details required by Condition 10 (Cycle Parking and Storage - Details) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment of hostel for long stays during the academic year and short stays out of the academic year; construction of mansard roof extension, and rear infill and closet wing extensions; creation of new internal level within rear closet wings; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West to provide bedrooms and ancillary space (amended description))

    Decided 4 Dec 2023 Conditions
  • CON/23/06309 Granted

    51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

    Details required by Condition 12 (submission of details - a) Existing and proposed section and elevation drawings of the replacement windows, including details of finish, double-glazed units' thickness, reveal and cill) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment of hostel for long stays during the academic year and short stays out of the academic year; construction of mansard roof extension, and rear infill and closet wing extensions; creation of new internal level within rear closet wings; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West to provide bedrooms and ancillary space (amended description)

    Decided 14 Nov 2023 Conditions

Timeline

Dates from the published record

  1. 12 Dec 2023

    Received by Kensington and Chelsea

  2. 2 Jan 2024

    Validated

    Checked as complete and ready for consideration.

  3. 15 Jan 2024

    Decision issued: Accept Non-Material Amendment(s)

  4. 10 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Applicant on file, registered in London

1 application on PlanIndex

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Documents

Plans, drawings, consultee responses and the officer's report

12 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.

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After the decision

Kensington and Chelsea 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 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 500 metres

  • 51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

    CON/24/06866 Submitted 15 Oct 2024 0m away

    Details required by condition 22 (submission of details - section and elevation drawings of the mansard roof and dormers at Mews Building) of planning permission 23/05908 allowed under appeal ref: APP/K5600/W/24/3343334 (Variation of conditions 2 (compliance with approved drawings) and 20 (Sustainable Urban Drainage System (SuDS) - implementation) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment; construction of mansard roof extension; rear infill and closet wing extensions; creation of new internal level; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West) for addition of a mansard on approved reconstructed mews and dropping of sills on two windows on mews elevation, and amended working of condition 20 to state the following: During construction of the development hereby permitted the submitted Sustainable urban Drainage System (SuDS), prepared by Herrington Consulting Limited (dated March 2022) and the Addendum (dated August 2023) shall be fully implemented and maintained thereafter)

    Granted Conditions Extension Loft or dormer +2 11 docs
  • 51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

    CON/23/07102 Submitted 30 Oct 2023 0m away

    Details required by Condition 10 (Cycle Parking and Storage - Details) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment of hostel for long stays during the academic year and short stays out of the academic year; construction of mansard roof extension, and rear infill and closet wing extensions; creation of new internal level within rear closet wings; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West to provide bedrooms and ancillary space (amended description))

    Granted Conditions Extension Loft or dormer +1 9 docs
  • 51-55 Cromwell Road, & 1-2 Queensberry Mews West, London, SW7 2EH

    CON/23/06309 Submitted 26 Sep 2023 0m away

    Details required by Condition 12 (submission of details - a) Existing and proposed section and elevation drawings of the replacement windows, including details of finish, double-glazed units' thickness, reveal and cill) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment of hostel for long stays during the academic year and short stays out of the academic year; construction of mansard roof extension, and rear infill and closet wing extensions; creation of new internal level within rear closet wings; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West to provide bedrooms and ancillary space (amended description)

    Granted Conditions Extension Loft or dormer +2 12 docs
  • 51-55 Cromwell Road and 1-2 Queensberry Mews West, London, SW7 2EH

    PP/23/05908 Submitted 8 Sep 2023 0m away

    Variation of Conditions 2 (Compliance with approved drawings) and 20 (Sustainable Urban Drainage System (SuDS) - implementation) of planning permission PP/23/02670 (Internal reconfiguration and refurbishment; construction of mansard roof extension; rear infill and closet wing extensions; creation of new internal level; alterations to front and rear of 51-55 Cromwell Road; demolition and rebuild of mews property at 1-2 Queensberry Mews West) for addition of a mansard on approved reconstructed mews and dropping of sills on two windows on mews elevation, and amended working of Condition 20 to state the following: During construction of the development hereby permitted the submitted Sustainable urban Drainage System (SuDS), prepared by Herrington Consulting Limited (dated March 2022) and the Addendum (dated August 2023) shall be fully implemented and maintained thereafter.

    Refused Full applications Extension Loft or dormer +2 117 docs
  • 51-55 Cromwell Road, London, SW7 2EH and 1-2 Queensberry Mews, London, SW7 2DU

    PP/22/01825 Submitted 16 Mar 2022 0m away

    Construction of mansard extension across 51-53 Cromwell Road (replacing existing roof form). Construction of mansard extension at 55 Cromwell Road, providing 12 hostel rooms and communal space (replacing 10 hostel rooms and communal space). Construction of rear infill extensions at 51-55 Cromwell Road between lower ground and first floor level comprising 4 hostel rooms and improved ancillary space. Creation of additional internal level within closet wings at rear of 51-55 Cromwell Road providing 3 hostel rooms. External alterations to front and rear of 51-55 Cromwell Road. Change of use of lower level of 1-2 Queensberry Mews West providing ancillary space. External alterations to front elevation of 1-2 Queensberry Mews West and addition of 3 roof lights.

    Granted Full applications Extension Loft or dormer 27 docs
  • 51-55 Cromwell Road and 1-2 Queensberry Mews West, London, SW7 2EH

    PP/25/05099 Submitted 18 Aug 2025 1m away

    Erection of two boiler flues at 1-2 Queensberry Mews West (Retrospective application)

    Granted Full applications 23 docs

In Kensington and Chelsea

  • NMA/26/04056 Awaiting decision

    10 Kensington Palace Gardens, London, W8 4QP

    Non-material amendment to planning permission PP/24/07201 to allow the reintroduction of an internal swimming pool to the lower ground/ undercroft of the main house, including associated works to internal servicing arrangements and spatial arrangement (including the omission of modern piers put forward under the Second Section 73 Application)

    24 Jul 2026 Amendments
  • NMA/26/04001 Awaiting decision

    Land adjoining 2 Horbury Crescent, London, W11 3NF

    Non-material amendment to planning permission PP/23/08263 (Construction of a two-bedroom residential dwelling across ground and basement levels.) relocation of stairs and internal partitions. Changes to rooflights and terrace areas.

    23 Jul 2026 Amendments
  • NMA/26/03986 Awaiting decision

    30 Brompton Square, London, SW3 2AE

    Non material amendment to planning permission 26/00660 (Variation of condition 2 (compliance with approved drawings) of planning permission 13/05535 (Redevelopment of lower ground floor in garden, excavation of two basement levels, replacement of glass pavilion, re-landscaping of rear garden and associated alterations) to allow for internal and external alterations to the approved scheme including reconfigured layouts, depths, and floor areas at basement levels 1,2, and 3, alterations to lightwells and introduction of a new lightwell; removal of the secondary staircase in the garden pavilion and the bridge over the rear lightwell and introduction of new york stone stairs at ground floor level; and changes to the lightwell and removal of the bridge at first floor level.) to remove the word 'glass' from the description above; i.e. (Variation of condition 2 (compliance with approved drawings) of planning permission 13/05535 (Redevelopment of lower ground floor in garden, excavation of two basement levels, replacement of pavilion, re-landscaping of rear garden and associated alterations) to allow for internal and external alterations to the approved scheme including reconfigured layouts, depths, and floor areas at basement levels 1,2, and 3, alterations to lightwells and introduction of a new lightwell; removal of the secondary staircase in the garden pavilion and the bridge over the rear lightwell and introduction of new york stone stairs at ground floor level; and changes to the lightwell and removal of the bridge at first floor level.)

    22 Jul 2026 Amendments
  • NMA/26/02562 Decided

    Treadgold House, 25 Bomore Road, London, W11 4HD

    Non-material amendment to planning permission PP/23/02367 dated 22 November 2022 (Alterations to existing facades including: installation of new external insulation system, replacement of all existing windows, works to balconies including addition of louvred shading, installation of new ground floor communal external doors and canopy; Alterations at roof level including:removal and replacement of roof system and guarding, construction of new parapet upstand, installation of photovoltaic panels; Replacement of all rainwater goods (amended description).) to allow the addition of a 2100 mm Width x 800 mm Deep x 1600 mm Height GRP white enclosure located to the South Elevation at Ground Floor Level; addition of No3 satellite grey dishes 775mm x 775mm with non-penetrating roof mount 1200mm x 1200mm located on the roof; revised ASHP pipework arrangement; and addition of No3 maintenance access step units (galvanised non-combustible stairs.

    8 May 2026 Amendments
  • NMA/26/02178 Withdrawn

    17-19 Cottesmore Gardens, London, W8 5PR

    Non-material amendment to planning permission PP/24/01317 to allow design updates, including revisions to the demolition drawings, removal of planters from non-accessible terraces and modifications to skylights and dry riser inlets

    13 Apr 2026 Amendments