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Planning application

2 Manchester Square London W1U 3PA

Granted Westminster 25/07163/FULL Full Planning Permission Application

Works: Extension Loft or dormer Windows or glazing

Relates to 25/07164/LBC

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Proposed infill of rear lightwell with walk-on, fire rated rooflights. Removal of the existing metal grill covering the lightwell; Infilling the lightwell at ground floor level to create an internal space; Installation of walk-on rooflights flush with the surrounding deck to allow daylight into the lower ground floor; Associated internal works to integrate the new structure, including provision for mechanical ventilation where required. New air handling unit to service rear room which has now become internal. Extended ventilation to service void under the suspended timber floor; Replacement of existing lead roof section on the ground floor, on a small corner adjacent to the bay window; Additional insulation to the rear lightwell floor slab, as this space will become internal; Revised floor build-up to the lower ground floor, rear extension room following discovery of the gridded masonry structure below the existing concrete slab.

As published by the council, reference 25/07163/FULL

Application record

Reference
25/07163/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
3 Oct 2025
Validated
16 Oct 2025
Decided
10 Mar 2026
Ward
Marylebone
Decision by
Delegated Decision
Postcode
W1U 3PA

Site history

Applications at this address on the Westminster register

This site has had 12 applications since 2003: 10 approved, 0 refused.

  • 25/07164/LBC Granted

    2 Manchester Square London W1U 3PA

    Proposed infill of rear lightwell with walk-on, fire rated rooflights. Removal of the existing metal grill covering the lightwell; Infilling the lightwell at ground floor level to create an internal space; Installation of walk-on rooflights flush with the surrounding deck to allow daylight into the lower ground floor; Associated internal works to integrate the new structure, including provision for mechanical ventilation where required. New air handling unit to service rear room which has now become internal. Extended ventilation to service void under the suspended timber floor; Replacement of existing lead roof section on the ground floor, on a small corner adjacent to the bay window; Additional insulation to the rear lightwell floor slab, as this space will become internal; Revised floor build-up to the lower ground floor, rear extension room following discovery of the gridded masonry structure below the existing concrete slab.

    Decided 10 Mar 2026 Heritage and listed buildings
  • 25/06335/LBC Granted

    2 Manchester Square London W1U 3PA

    Removal of one rooflight in the main roof and installation of one apex rooflight in the main roof to replace the existing rooflight.

    Decided 26 Mar 2026 Heritage and listed buildings
  • 25/06334/FULL Granted

    2 Manchester Square London W1U 3PA

    Removal of one rooflight in the main roof and installation of one apex rooflight in the main roof to replace the existing rooflight.

    Decided 10 Mar 2026 Full applications
  • 25/01094/ADLBC Awaiting decision

    2 Manchester Square London W1U 3PA

    Detailed information of the new rooflights (detailed plans, elevations and sections at 1:20, plus finishes schedule, and manufacturer's product details as applicable) pursuant to Condition 5 (A) of listed building dated 28th November 2024 (RN:23/05939/LBC)

    Submitted 17 Feb 2025 Conditions
  • 25/01102/ADLBC Granted

    2 Manchester Square London W1U 3PA

    Detailed information of works to preserve and/or record any historic flooring layers discovered during the excavation of the existing basement floor (a detailed Conservation Method Statement, to include a detailed photographic and written analysis of what is found, and detailed existing and proposed floor build-up sections at 1:10) pursuant to Condition 5 (D) of listed building dated 28th November 2024 (RN:23/05939/LBC)

    Decided 20 Mar 2025 Conditions
  • 25/01101/ADLBC Awaiting decision

    2 Manchester Square London W1U 3PA

    Detailed information of the extent of replacement and repaired floors and ceilings, including floorboards, plasterwork and underlying timber structure (a detailed Conservation Method Statement, to incorporate detailed marked-up floor and reflected ceiling plans at 1:20) pursuant to Condition 5(B) of listed building dated 28th November 2023 (RN: 23/05939/LBC)

    Submitted 17 Feb 2025 Conditions
  • 06/00993/AD7 Granted

    2 Manchester Square London W1U 3PA

    Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.6 x 0.45m.

    Decided 16 Feb 2006 Advertising
  • 05/05999/AD7 Granted

    2 Manchester Square London W1U 3PA

    Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.6m x 0.45m.

    Decided 3 Aug 2005 Advertising
  • 05/00300/AD7 Granted

    2 Manchester Square London W1U 3PA

    Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.6 x 0.45m.

    Decided 20 Jan 2005 Advertising
  • 04/05270/AD7 Granted

    2 Manchester Square London W1U 3PA

    Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.6 x 0.45m.

    Decided 16 Jul 2004 Advertising

Timeline

Dates from the published record

  1. 3 Oct 2025

    Received by Westminster

  2. 16 Oct 2025

    Validated

    Checked as complete and ready for consideration.

  3. 10 Mar 2026

    Decision issued: Application Permitted

  4. 21 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/07164/LBC Granted

    2 Manchester Square London W1U 3PA

    Proposed infill of rear lightwell with walk-on, fire rated rooflights. Removal of the existing metal grill covering the lightwell; Infilling the lightwell at ground floor level to create an internal space; Installation of walk-on rooflights flush with the surrounding deck to allow daylight into the lower ground floor; Associated internal works to integrate the new structure, including provision for mechanical ventilation where required. New air handling unit to service rear room which has now become internal. Extended ventilation to service void under the suspended timber floor; Replacement of existing lead roof section on the ground floor, on a small corner adjacent to the bay window; Additional insulation to the rear lightwell floor slab, as this space will become internal; Revised floor build-up to the lower ground floor, rear extension room following discovery of the gridded masonry structure below the existing concrete slab.

    Decided 10 Mar 2026 Heritage and listed buildings

1 later application on the register refers to this one:

  • 25/07164/LBC Granted

    2 Manchester Square London W1U 3PA

    Proposed infill of rear lightwell with walk-on, fire rated rooflights. Removal of the existing metal grill covering the lightwell; Infilling the lightwell at ground floor level to create an internal space; Installation of walk-on rooflights flush with the surrounding deck to allow daylight into the lower ground floor; Associated internal works to integrate the new structure, including provision for mechanical ventilation where required. New air handling unit to service rear room which has now become internal. Extended ventilation to service void under the suspended timber floor; Replacement of existing lead roof section on the ground floor, on a small corner adjacent to the bay window; Additional insulation to the rear lightwell floor slab, as this space will become internal; Revised floor build-up to the lower ground floor, rear extension room following discovery of the gridded masonry structure below the existing concrete slab.

    Decided 10 Mar 2026 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

Garnett Architecture LLP Agent, an architecture practice registered in London

Active · incorporated 2003 · London

21 applications on PlanIndex · 100% 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 record

Documents

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

40 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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What this grant of permission means

Westminster granted permission on 10 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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 0.3 miles

  • 2 Manchester Square London W1U 3PA

    25/07164/LBC Submitted 3 Oct 2025 50 yards away

    Proposed infill of rear lightwell with walk-on, fire rated rooflights. Removal of the existing metal grill covering the lightwell; Infilling the lightwell at ground floor level to create an internal space; Installation of walk-on rooflights flush with the surrounding deck to allow daylight into the lower ground floor; Associated internal works to integrate the new structure, including provision for mechanical ventilation where required. New air handling unit to service rear room which has now become internal. Extended ventilation to service void under the suspended timber floor; Replacement of existing lead roof section on the ground floor, on a small corner adjacent to the bay window; Additional insulation to the rear lightwell floor slab, as this space will become internal; Revised floor build-up to the lower ground floor, rear extension room following discovery of the gridded masonry structure below the existing concrete slab.

    Granted Heritage and listed buildings Extension Loft or dormer +1 34 docs

  • 2 Manchester Square London W1U 3PA

    25/06335/LBC Submitted 5 Sep 2025 50 yards away

    Removal of one rooflight in the main roof and installation of one apex rooflight in the main roof to replace the existing rooflight.

    Granted Heritage and listed buildings Loft or dormer 27 docs

  • 2 Manchester Square London W1U 3PA

    25/06334/FULL Submitted 5 Sep 2025 50 yards away

    Removal of one rooflight in the main roof and installation of one apex rooflight in the main roof to replace the existing rooflight.

    Granted Full applications Loft or dormer 31 docs

  • 2 Manchester Square London W1U 3PA

    25/01094/ADLBC Submitted 17 Feb 2025 50 yards away

    90% historically approved · decision due ~14 Apr

    Detailed information of the new rooflights (detailed plans, elevations and sections at 1:20, plus finishes schedule, and manufacturer's product details as applicable) pursuant to Condition 5 (A) of listed building dated 28th November 2024 (RN:23/05939/LBC)

    Awaiting decision Conditions Loft or dormer 12 docs

  • 2 Manchester Square London W1U 3PA

    25/01102/ADLBC Submitted 17 Feb 2025 50 yards away

    Detailed information of works to preserve and/or record any historic flooring layers discovered during the excavation of the existing basement floor (a detailed Conservation Method Statement, to include a detailed photographic and written analysis of what is found, and detailed existing and proposed floor build-up sections at 1:10) pursuant to Condition 5 (D) of listed building dated 28th November 2024 (RN:23/05939/LBC)

    Granted Conditions 15 docs

  • 2 Manchester Square London W1U 3PA

    25/01101/ADLBC Submitted 17 Feb 2025 50 yards away

    90% historically approved · decision due ~14 Apr

    Detailed information of the extent of replacement and repaired floors and ceilings, including floorboards, plasterwork and underlying timber structure (a detailed Conservation Method Statement, to incorporate detailed marked-up floor and reflected ceiling plans at 1:20) pursuant to Condition 5(B) of listed building dated 28th November 2023 (RN: 23/05939/LBC)

    Awaiting decision Conditions 61 docs

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront with Medication Dispensing Outlet.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06297/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06294/FULL Awaiting decision

    15 Eaton Mews South London SW1W 9HP

    Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06317/FULL Awaiting decision

    124 Hamilton Terrace London NW8 9UT

    Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06273/FULL Awaiting decision

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

    Received 14 Sep, published by the council 22 Sep 2026 Full applications