Planning application
19 Mallord Street, London, SW3 6AP
Works: Extension 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 PP/20/04812 to allow for a series of external and internal amendments comprising alterations to windows, louvres and openings on both the front and rear elevations; altered wall, door and windows to the rear extension; installation of new rainwater pipe to rear elevation; revised internal layouts; and other associated works
As published by the council, reference NMA/26/02093
Application record
- Reference
- NMA/26/02093
- Type
- Non-Material Amendments
- Status
- Decided
- Decision
- Accept Non-Material Amendment(s)
- Received
- 2 Apr 2026
- Decided
- 11 May 2026
- Ward
- Stanley
- Parish
- 18
- Postcode
- SW3 6AP
Site history
Applications at this address on the Kensington and Chelsea register
This site has had 15 applications since 2023: 11 approved, 1 refused.
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CON/26/02561 Granted
19 Mallord Street, London, SW3 6AP
Details required by Condition 12 (Noise survey - prior to occupation) of planning permission 20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building).
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CON/26/01371 Granted
19 Mallord Street, London, SW3 6AP
Details required by Condition 17 (Contamination Verification Report) of planning permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
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CA/26/01575 Awaiting decision
19 Mallord Street, London, SW3 6AP
Installation of 1 x illuminated fascia sign above entrance, and 1 x wall plaque to the side.
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CON/26/00707 Granted
19 Mallord Street, London, SW3 6AP
Details required by condition 3d (submission of details - d) Lighting Schedule) of planning permission 20/04812 (Change of use of basement, ground and three upper storeys from former telephone ex-change (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building
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CON/26/00866 Granted
19 Mallord Street, London, SW3 6AP
Details required by Condition 27 (Air Source Heat Pumps (ASHP), Ground Source Heat Pumps (GSHP), Photovoltaic Panels & Electric Boiler Compliance) of Planning Permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone ex-change (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
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CON/25/05675 Granted
19 Mallord Street, London, SW3 6AP
Details required by condition 3e (Submission of details - (e) Cycle parking and storage;) of planning permission 20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building.)
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CON/25/05676 Granted
19 Mallord Street, London, SW3 6AP
Details required by condition 3c (Submission of details - (c) Green roof, planting schedule and maintenance;) of planning permission 20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building.)
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CON/25/05077 Granted
19 Mallord Street, London, SW3 6AP
Details required by condition 4b (submission of details - prior to occupation, Operational Management Plan) of planning permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
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CON/25/04562 Granted
19 Mallord Street, London, SW3 6AP
Details required by Condition 25 (Combustion Plant: Flue Stack Height) of planning permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
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CON/23/07693 Granted
19 Mallord Street, London, SW3 6AP
Details required by condition 3 (submission of details - a) sample of paving on front forecourt) of planning permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
Timeline
Dates from the published record
-
2 Apr 2026
Received by Kensington and Chelsea
-
11 May 2026
Decision issued: Accept Non-Material Amendment(s)
-
20 Jul 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
33 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.
Trade members open them from here.
Open the documentsAfter 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
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19 Mallord Street, London, SW3 6AP
Details required by condition 20 (FRA/SuDS) of planning permission 20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
Granted Conditions Extension 7 docsSmall domestic -
19 Mallord Street, London, SW3 6AP
Details required by condition 3 (submission of details - a) sample of paving on front forecourt) of planning permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
Granted Conditions Extension 4 docsSmall domestic -
19 Mallord Street, London, SW3 6AP
Details required by Condition 11 (Noise survey) of planning permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone exchange (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
Granted Conditions Extension 9 docsSmall domestic -
19 Mallord Street, London, SW3 6AP
88% historically approved · decision due ~17 Apr
Installation of 1 x illuminated fascia sign above entrance, and 1 x wall plaque to the side.
Awaiting decision Advertising 11 docs -
19 Mallord Street, London, SW3 6AP
Details required by condition 3d (submission of details - d) Lighting Schedule) of planning permission 20/04812 (Change of use of basement, ground and three upper storeys from former telephone ex-change (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building
Granted Conditions Extension 8 docsSmall domestic -
19 Mallord Street, London, SW3 6AP
Details required by Condition 27 (Air Source Heat Pumps (ASHP), Ground Source Heat Pumps (GSHP), Photovoltaic Panels & Electric Boiler Compliance) of Planning Permission PP/20/04812 (Change of use of basement, ground and three upper storeys from former telephone ex-change (Sui Generis) to new health and fitness club; creation of small single storey rear extension at basement level; excavation for a swimming pool at basement level; alterations to entrances and external paving; and other works and improvements to building)
Granted Conditions Extension 7 docsSmall domestic
Other amendment applications
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)
-
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.
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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.)
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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.
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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