Planning application
Frognal House 99 Frognal London NW3 6XR
Works: Extension Demolition
Relates to 2024/0030/P
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Details for partial discharge of Parts A and B of condition 20 (Air Quality Monitors) from planning application 2024/0030/P dated 24/09/2025 for 'Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof. Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house'
As published by the council, reference 2025/5742/P
Application record
- Reference
- 2025/5742/P
- Type
- Approval of Details
- Status
- Final Decision
- Decision
- Granted
- Received
- 18 Dec 2025
- Validated
- 7 Jan 2026
- Decided
- 11 Feb 2026
- Ward
- Frognal
- Decision by
- Delegated
- Postcode
- NW3 6XR
Site history
Applications at this address on the Camden register
This site has had 15 applications since 2010: 13 approved, 0 refused.
-
2026/2108/P Granted
Frognal House 99 Frognal London NW3 6XR
Details for discharge of condition 6 (chartered engineer), 9 (Flood risk mitigation) and 10 (Rainwater recycling) from planning application 2024/0030/P dated 24/09/2025 for 'Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof. Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house.'
-
2026/1643/P Granted
Frognal House 99 Frognal London NW3 6XR
Details for discharge of condition 12 (Green Roof) and 25 (Hard and soft landscaping) from planning application 2024/0030/P dated 24/09/2025 for 'Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof. Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house.'
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2026/1547/P Granted
Frognal House 99 Frognal London NW3 6XR
Details for partial discharge of Part C of condition 20 (Air Quality Monitors) from planning application 2024/0030/P dated 24/09/2025 for 'Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof.Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house.'
-
2026/1503/P Granted
Frognal House 99 Frognal London NW3 6XR
Non-material amendment to planning permission 2024/0030/P, granted subject to a legal agreement on 24/09/2025, for 'Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof. Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house' NAMELY to clarify/confirm tree retention details and update the associated tree protection area.
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2025/2930/T Granted
Frognal House 99 Frognal London NW3 6XR
REAR GARDEN: 1 x Yew (T4) - Prune back branches that overhang the S boundary back to the boundary wall - 1m - 2m branch length removal. 1 x Horse Chestnut (T5) - Reduce crown to previous points of reduction, 1m - 2m branch length removal. 1 x Beech (T7) - Reduce crown by up to 3m on all aspects, pruning back to growth points.
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2022/5443/T Granted
Frognal House 99 Frognal London NW3 6XR
SIDE COURTYARD GARDEN: 1 x Willow (T1) - Fell in sections to ground level.
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2021/2208/L Granted
Frognal House 99 Frognal London NW3 6XR
Erection of a plaque commemorating the award of the Croix de la Liberation by General Charles de Gaulle to the head of the French resistance in 1943.
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2020/0574/T Granted
Frognal House 99 Frognal London NW3 6XR
FRONT SIDE GARDEN: 1 x Horse Chestnut (T1) - Crown reduce back to previous points.
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2019/2102/P Granted
Frognal House 99 Frognal London NW3 6XR
Replacement of rear roof of lightwell at ground floor
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2019/2838/L Granted
Frognal House 99 Frognal London NW3 6XR
Replacement of rear roof of lightwell at ground floor
Timeline
Dates from the published record
-
18 Dec 2025
Received by Camden
-
7 Jan 2026
Validated
Checked as complete and ready for consideration.
-
11 Feb 2026
Decision issued: Granted
-
9 Aug 2026
Added to PlanIndex
Related applications
Cases linked to this one on the register
-
2024/0030/P Awaiting decision
Frognal House 99 Frognal London NW3 6XR
Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof. Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house
Documents
Plans, drawings, consultee responses and the officer's report
6 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 documentsWhat this grant of permission means
Camden granted permission on 11 February 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 500 metres
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Frognal House 99 Frognal London NW3 6XR
SIDE COURTYARD GARDEN: 1 x Willow (T1) - Fell in sections to ground level.
Granted Trees -
99 Frognal House Frognal London NW3 6XR
REAR GARDEN: 1 x London Plane T1 - reduce back to previous points 1 x Maple T2 - reduce back to previous points 1 x Horse Chestnut T4 - reduce back to previous points 1 x Conifer T5 - fell to ground level 1 x Alder T6 - reduce by 4 metres in height and 2 metres on lateral away from building 1 x London Plane T7 - reduce by 3 metres in height and 2 metres on laterals to take away from neighbouring building roof 1 x Silver Birch T8 - reduce by 3 metres in height 1 x Large conifer T9 - fell to ground level due to excessive shading and tree on lean Group small conifers/yew T10,11,13 &14 - fell to ground level 1 x Beech T12 - reduce by 4 meters in height and 2 meters on laterals 1 x Cherry T15 - fell due to wounded stem 1 x Cherry T18 - reduce laterals away from adjacent building SIDE GARDEN: 1 x Cherry T3 - reduce by 2 metres in height and cut away from building 1 x Large conifer T16 - remove due tree growing too large for its location - tree on a lean and producing excessive leaf litter on convent 1 x Holly T17 - remove due to proximity to building
Granted Trees -
99A Frognal London NW3 6XR
Details of tree report as required by condition 7 and details of green roof as required by condition 15 of planning permission 2013/7195/P dated 23/10/2014 for erection of a three-storey dwelling house (Class C3) with basement following demolition of existing dwelling
Granted Full applications Demolition TreesDomestic -
99A Frognal London NW3 6XR
Details of Sustainable Urban Drainage System as required by condition 11 of planning permission 2013/7195/P dated 23/10/2014 for the erection of a three storey dwelling house (Class C3) with basement following demolition of existing dwelling
Granted Full applications DemolitionDomestic -
Frognal House 99 Frognal London NW3 6XR
91% historically approved
Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof. Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house
Awaiting decision Full applications Extension Demolition -
Frognal House 99 Frognal London NW3 6XR
96% historically approved
Change of use of convent (Sui Generis) to create four residential units (C3), demolition of existing extension and erection of a part one part two storey extension with green roof. Erection of roof extension with roof terrace and railings. Excavation of basement with entrance, conversion of garage, new bin and bike stores, hard and soft landscaping and alterations to fenestrations of the main house. Internal alterations to main house
Awaiting decision Heritage and listed buildings Extension Demolition
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Amalgamation of the existing three self-contained one-bedroom flats into a single-family dwelling house; demolition and replacement of existing outrigger; erection of a single-storey rear wrap-around extension; erection of a rear dormer extension; creation of a roof terrace above outrigger; replacement of existing windows with timber double glazed units; installation of rooflights to front roofslope; and installation of an air source heat pump in rear garden.
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2026/3282/P Granted
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2026/0483/P Granted
100 Avenue Road London NW3 3HF
Discharge of details for condition 47 (surface water run off details) of planning permission 2026/0404/P granted on 19/06/2026 for " Variation of conditions (2 plan numbers); 8 (quantum of commercial space); 13 (commercial windows); 15 (Wind Microclimate); 19 (commercial windows); 24 (Air quality); 34 (development quantum); 40 (Circular Economy); 44 (designing out crime); 45 (Fire Strategy); 46 (SuDS); 48 (Community facility removed), 48 (wheelchair units), 49 (TfL health and safety) to planning permission ref. 2025/0852/P (for demolition of building and provision of a mixed-use residential-led development) to secure alterations to the external appearance; internal residential and commercial space layouts; omission of community floorspace and increased affordable housing provision; cycle and car parking; hard and soft landscaping, and other associated amendments”
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2026/2697/P Awaiting decision
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Replacement of existing defective rear lean-to conservatory with a new slimline powder-coated aluminium framed conservatory with clear double glazing, on the exact same footprint as existing.