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Planning application

Frognal House 99 Frognal London NW3 6XR

Awaiting decision Camden 2024/0176/L Heritage and listed buildings

Works: Extension Demolition

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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

As published by the council, reference 2024/0176/L

Application record

Reference
2024/0176/L
Category
Heritage and listed buildings
Status
Registered
Postcode
NW3 6XR

Site history

Applications at this address on the Camden register

This site has had 17 applications since 2010: 13 approved, 0 refused.

  • 2026/4180/L Awaiting decision

    Frognal House 99 Frognal London NW3 6XR

    Details for partial discharge of condition 5 (Structure report) of listed building consent 2024/0176/L dated 24/09/2025 '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'

    Submitted 25 Sep 2026 Heritage and listed buildings
  • 2026/4179/P Awaiting decision

    Frognal House 99 Frognal London NW3 6XR

    Details for partial discharge of condition 4 (Materials) (Part B only) of listed building consent 2024/0176/L dated 24/09/2025 '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'

    Submitted 25 Sep 2026 Full applications
  • 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.'

    Decided 17 Jul 2026 Full applications
  • 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.'

    Decided 2 Jun 2026 Full applications
  • 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.'

    Decided 1 Jun 2026 Full applications
  • 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.

    Decided 16 Jun 2026 Amendments
  • 2025/5742/P Granted

    Frognal House 99 Frognal London NW3 6XR

    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'

    Decided 11 Feb 2026 Full applications
  • 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.

    Decided 5 Aug 2025 Trees
  • 2022/5443/T Granted

    Frognal House 99 Frognal London NW3 6XR

    SIDE COURTYARD GARDEN: 1 x Willow (T1) - Fell in sections to ground level.

    Decided 2 Feb 2023 Trees
  • 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.

    Decided 21 Jul 2021 Heritage and listed buildings

Timeline

Dates from the published record

  1. 22 Jul 2026

    Added to PlanIndex

  2. Decision

    Awaiting decision

    The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.

    Camden took a median of 43 days over the applications it decided in the last year.

Cases linked to this one on the register

2 later applications on the register refer to this one:

  • 2026/4180/L Awaiting decision

    Frognal House 99 Frognal London NW3 6XR

    Details for partial discharge of condition 5 (Structure report) of listed building consent 2024/0176/L dated 24/09/2025 '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'

    Submitted 25 Sep 2026 Heritage and listed buildings
  • 2026/4179/P Awaiting decision

    Frognal House 99 Frognal London NW3 6XR

    Details for partial discharge of condition 4 (Materials) (Part B only) of listed building consent 2024/0176/L dated 24/09/2025 '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'

    Submitted 25 Sep 2026 Full applications

What happens while it is decided

This application is with Camden for determination, against a statutory target of eight weeks. Over the last year Camden decided heritage and listed building applications in a median of 56 days. More in our guide to how long planning decisions take.

About heritage and listed building applications

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • Frognal House 99 Frognal London NW3 6XR

    2022/5443/T 50 yards away

    SIDE COURTYARD GARDEN: 1 x Willow (T1) - Fell in sections to ground level.

    Granted Trees

  • 99 Frognal House Frognal London NW3 6XR

    2016/1237/T 50 yards away

    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

    2017/4825/P 50 yards away

    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 Trees
    Domestic

  • 99A Frognal London NW3 6XR

    2017/5011/P 50 yards away

    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 Demolition
    Domestic

  • Frognal House 99 Frognal London NW3 6XR

    2024/0030/P 50 yards away

    92% 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

    2020/0574/T 50 yards away

    FRONT SIDE GARDEN: 1 x Horse Chestnut (T1) - Crown reduce back to previous points.

    Granted Trees

In Camden

  • 2026/1141/L Granted

    25 John Street London WC1N 2BS

    Internal and external alterations to partition layout at basement, supporting structures and external ground level, and alterations to design of conservatory, windows and doors granted under listed building consent 2024/0338/L dated 06/08/2024.

    Received 26 Mar, published by the council 24 Jul 2026 Heritage and listed buildings
  • 2025/1781/L Granted

    Frognal Rise House Lower Terrace London NW3 6RE

    Demolition of existing garage and interlinking gallery and replacement with new garage and garden room with link, new basement floor below garden, alterations to main house including replacement windows including reinstated oriel window and new French doors to entrance elevation, new roofing to side wing, new portico and replacement door to front elevation, enlargement of existing lightwell, replacement gates and canopy over entrance gate, restorations of boundary treatments, associated internal alterations including partial underpinning works and other minor alterations.

    Received 22 Apr, published by the council 22 Jul 2026 Heritage and listed buildings
  • 2026/4129/L Awaiting decision

    6 Leverton Street London NW5 2PJ

    Strip out kitchen including floor tiles and replace; replace plumbing and flooring in rear ensuite; replace plumbing in front ensuite and WC; replace internal doors; replace garden wall with metal railing; replace 3 rear windows, 3 rear elevation side windows, 1 rear door and 1 rear elevation side door with double-glazed crittal windows and doors; remove 2 rear windows; render rear elevation brickwork; and associated works.

    Received 1 Oct, published by the council 9 Oct 2026 Heritage and listed buildings
  • 2026/1686/L Granted

    Flat Ground and 1st Floor and Flat 2nd and 3rd Floor 14 Downshire Hill London NW3 1NR

    External and internal alterations in connection with conversion of two self-contained flats into a single-family dwellinghouse, including new doors at rear ground and second floor level, replacement windows at rear second and third floors level, removal of internal partitions, extending the stair handrail, and replacement internal doors, parquet flooring, skirting, architraves, cornicing, and fittings.

    Received 19 May, published by the council 24 Jul 2026 Heritage and listed buildings
  • 2026/2202/L Refused

    4 Hampstead Square London NW3 1AB

    Erection of conservatory to front elevation.

    Received 27 May, published by the council 24 Jul 2026 Heritage and listed buildings