Planning application
The National Gallery Trafalgar Square London WC2N 5DN
Works: Extension Roofing Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Introduction of extract ventilation at high level within the clerestory, requiring adjustment of modern glazing, introduction of new plant in the rooftop R184 plant room and associated ductwork within the existing roof void, external wall insulation within the Orange Street loading bay to the north wall of Gallery 31, replacement of existing internal louvres with external solar shading fins, modifications and extension of the existing 1980s over-roof structure and replacement of the existing glazing in the over-roofs, replacement of existing lead walkway to perimeter of roofs with new roof membrane, new guarding at roof level, new external metal gantry at the north wall for access to plant equipment. (Linked to 26/03250/LBC)
As published by the council, reference 26/03249/FULL
Application record
- Reference
- 26/03249/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 18 May 2026
- Validated
- 18 May 2026
- Ward
- St James's
- Postcode
- WC2N 5DN
Site history
Applications at this address on the Westminster register
This site has had 23 applications since 2022: 6 approved, 0 refused.
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26/06130/ADV Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Display of no illuminated hoarding measuring 12.5m X 3.6m, 6.6m X 3.6m, 12.6m X 3.6m, 12.6m X 3.6m and 7.8m X 3.6m along Jubilee Walk and part of the northern terrace.
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26/04136/LBC Decided
The National Gallery Trafalgar Square London WC2N 5DN
Installation of external condenser units within the western lightwell adjacent to Jubilee Walk at the National Gallery and associated works.
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26/04135/FULL Decided
The National Gallery Trafalgar Square London WC2N 5DN
Installation of external condenser units within the western lightwell adjacent to Jubilee Walk at the National Gallery and associated works.
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26/03250/LBC Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Refurbishment works to the Galleries 30 and 31 in the Wilkins Building of the National Gallery including removal of the existing floor grilles and replacement with new cast-iron grilles flush to the adjacent floors, to match adjacent gallery spaces, removal of the existing modern timber floor in Gallery 30 and replacement in new timber boards to match adjacent galleries, refurbishment of remaining floor finishes and stone skirtings, renewal of fabric wall coverings, redecoration of the plaster cornice and coving based on the original design, introduction of extract ventilation at high level within the clerestory, requiring adjustment of modern glazing, introduction of new plant in the rooftop R184 plant room and associated ductwork within the existing roof void for supply and extract ventilation and air conditioning, external wall insulation within the Orange Street loading bay to the north wall of Gallery 31, replacement of existing internal louvres with external solar shading fins, modifications and extension of the existing 1980s over-roof structure and replacement of the existing glazing in the over-roofs, replacement of existing lead walkway to perimeter of roofs with new roof membrane, new guarding at roof level, adjustments to gallery lighting internally and new environmental lighting within the roof void, new external metal gantry at the north wall for access to plant equipment. (Linked to 26/03249/FULL)
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26/02901/LBC Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Reconfiguration and refurbishment of cafe and restaurant WC facilities within the Wilkins Building.
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26/02784/LBC Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Replacement of existing external entrance doors at the St Martins Wing and Portico entrances of The National Gallery. (Linked to 26/02783/FULL)
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26/02783/FULL Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Replacement of existing external entrance doors at the St Martins Wing and Portico entrances of The National Gallery. (Linked to 26/02784/LBC)
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26/02488/NMA Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Amendments to planning permission dated 19th December 2022 (RN:22/04894/FULL) for Remodelling of external gates, replacement glazing and adaption and enclosure of the loggia of the Sainsbury Wing. External alterations to the Wilkins Building, including alterations and part removal of railings, lawn and wall, with new entrance on Trafalgar Square to the Research Centre and Members Room. New basement link under Jubilee Walk, including excavation. Public realm works to the north of Trafalgar Square and Jubilee Walk, including new paving, benches, bollards and planting. New window and external alterations to Pigott Education Centre on Orange Street. Namely, relating to internal changes in the Wilkins building, access improvements, minor changes to layout, fire safety works; amends to means and doors and floors; most internal and some external including plant and lightwells; CCTV and refurbishment of windows.
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26/02533/ADLBC Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Detailed drawings (at scale 1:10 unless otherwise agreed in writing) materials of the following parts of the development within the interior of the Sainsbury Wing, walls, ceilings and details of the all new CCTV and details of the following parts of the development within the interior of the Wilkins Building cornices, skiting, architraves and doors, both those which are intended to be traditional replicas and contemporary additions, general interior finishes, builder's work and other servicing openings and details of the new staircase within the Wilkins Building and details of the new windows to the Wilkins Building (elevations and sections scaled 1:10) pursuant to condition of listed building dated 8th November 2024 (RN:24/06076/LBC )
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26/02487/ADFULL Awaiting decision
The National Gallery Trafalgar Square London WC2N 5DN
Details of the all new CCTV and details of the new windows to the Wilkins Building (elevations and sections scaled 1:10) pursuant to condition 6 (iii) and 7 of planning permission dated 19th December 2022 (RN:22/04894/FULL)
Timeline
Dates from the published record
-
18 May 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 13 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
Purcell LLP Agent, registered in Thames Ditton
Dissolved · incorporated 2001 · Thames Ditton
207 applications on PlanIndex · across 42 councils · 100% granted
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See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
37 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 full applications in a median of 91 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.
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The National Gallery Trafalgar Square London WC2N 5DN
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The National Gallery Trafalgar Square London WC2N 5DN
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