5-6 Underhill Street London NW1 7HS

This site has had 7 applications since 2018: 6 approved, 0 refused.

• 2026/1780/P Awaiting decision

  5-6 Underhill Street London NW1 7HS

  Change of use of ground floor rear office (Class E) unit to residential (Class C3) for the provision of 3no. self-contained residential units; minor alterations to fenestration at rear.

  Submitted 4 May 2026 Full applications
• 2025/2776/P Granted

  5-6 Underhill Street London NW1 7HS

  Details pursuant to Condition 5 (Ground Floor Window Details) of planning permission 2024/5382/P (dated 18/06/2025) for the 'Change of use of ground floor front office (Class E) unit to residential (Class C3) for the provision of two self-contained residential units'.

  Decided 9 Jul 2025 Full applications
• 2024/5382/P Granted

  5-6 Underhill Street London NW1 7HS

  Change of use of ground floor front office (Class E) unit to residential (Class C3) for the provision of two self-contained residential units.

  Decided 18 Jun 2025 Full applications
• 2024/1314/P Granted

  5-6 Underhill Street London NW1 7HS

  Change of use of second floor office space (Class E) to residential (Class C3) for the provision of a new self-contained residential unit.

  Decided 11 Sep 2024 Full applications
• 2022/5582/P Granted

  5 - 6 Underhill Street London NW1 7HS

  Conversion of two office suites on the second floor (Class E) into two self-contained flats (Class C3) with ancillary amenity space, new window and PV solar panels.

  Decided 1 Dec 2023 Full applications
• 2017/4332/P Granted

  5-6 Underhill Street LONDON NW1 7HS

  Variation to condition 3 of planning permission 2015/0034/P dated 10/03/2016, for extensions and alterations to the existing building including erection of a single storey extension to the roof fronting Underhill Street to provide 1 x 3 bed self-contained flat (Class C3 use); namely to include increase in the height of the extension by 0.17m, increase in footprint, installation of new windows in the southwestern side elevation and alterations to the design and fenestration of the single storey extension at roof level.

  Decided 29 Aug 2018 Full applications

1. 4 Feb 2019

   Received by Camden

2. 18 Feb 2019

   Validated

   Checked as complete and ready for consideration.

3. 28 Nov 2019

   Decision issued: Granted Subject to a Section 106 Legal Agreement

4. 22 Jul 2026

   Added to PlanIndex

5. 17 Sep 2026

   Status changed to FINAL DECISION

   Previously Final Decision.

• 2015/0034/P Granted

  5 Underhill Street London NW1 7HS

  Extensions and alterations to the existing building including erection of a single storey extension to the roof fronting Underhill Street to provide 1 x 3 bed self-contained flat (Class C3 use) with external roof terrace and metal privacy screen, erection of two storey lift shaft to the rear at first and second floor level, installation of external fire escape staircase from ground to second floor level, alterations to the ground floor front elevation to create a new ground floor residential entrance and office entrance fronting Underhill Street, replacement of ground floor window openings with doors to bin store area and office storage area, and installation of roof light on the roof of the single storey front/side extension of the existing office building (Class B1 use).

  Decided 10 Mar 2016 Full applications
• 2017/4332/P Granted

  5-6 Underhill Street LONDON NW1 7HS

  Variation to condition 3 of planning permission 2015/0034/P dated 10/03/2016, for extensions and alterations to the existing building including erection of a single storey extension to the roof fronting Underhill Street to provide 1 x 3 bed self-contained flat (Class C3 use); namely to include increase in the height of the extension by 0.17m, increase in footprint, installation of new windows in the southwestern side elevation and alterations to the design and fenestration of the single storey extension at roof level.

  Decided 29 Aug 2018 Full applications

Camden granted permission on 28 November 2019, 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.

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.

• 5-6 Underhill Street LONDON NW1 7HS

  2017/4332/P 1m away

  Variation to condition 3 of planning permission 2015/0034/P dated 10/03/2016, for extensions and alterations to the existing building including erection of a single storey extension to the roof fronting Underhill Street to provide 1 x 3 bed self-contained flat (Class C3 use); namely to include increase in the height of the extension by 0.17m, increase in footprint, installation of new windows in the southwestern side elevation and alterations to the design and fenestration of the single storey extension at roof level.

  Granted Full applications Extension Windows or glazing
  Small domestic

• 5-6 Underhill Street London NW1 7HS

  2024/5382/P 2m away

  Change of use of ground floor front office (Class E) unit to residential (Class C3) for the provision of two self-contained residential units.

  Granted Full applications

• 5-6 Underhill Street London NW1 7HS

  2026/1780/P Submitted 4 May 2026 2m away

  91% historically approved · decision due ~30 Jun

  Change of use of ground floor rear office (Class E) unit to residential (Class C3) for the provision of 3no. self-contained residential units; minor alterations to fenestration at rear.

  Awaiting decision Full applications Windows or glazing 13 docs

• 5-6 Underhill Street London NW1 7HS

  2024/1314/P 2m away

  Change of use of second floor office space (Class E) to residential (Class C3) for the provision of a new self-contained residential unit.

  Granted Full applications

• 5-6 Underhill Street London NW1 7HS

  2025/2776/P 2m away

  Details pursuant to Condition 5 (Ground Floor Window Details) of planning permission 2024/5382/P (dated 18/06/2025) for the 'Change of use of ground floor front office (Class E) unit to residential (Class C3) for the provision of two self-contained residential units'.

  Granted Full applications Windows or glazing

• 5 Underhill Street London NW1 7HS

  2015/0034/P 2m away

  Extensions and alterations to the existing building including erection of a single storey extension to the roof fronting Underhill Street to provide 1 x 3 bed self-contained flat (Class C3 use) with external roof terrace and metal privacy screen, erection of two storey lift shaft to the rear at first and second floor level, installation of external fire escape staircase from ground to second floor level, alterations to the ground floor front elevation to create a new ground floor residential entrance and office entrance fronting Underhill Street, replacement of ground floor window openings with doors to bin store area and office storage area, and installation of roof light on the roof of the single storey front/side extension of the existing office building (Class B1 use).

  Granted Full applications Extension Loft or dormer +1
  Small domestic

• 2026/4008/P Awaiting decision

  6 Murray Street London NW1 9RE

  Non-material amendment to planning permission ref. 2023/3483/P (dated 25/10/2023) for 'Erection of mansard roof extension and replacement shopfront', NAMELY for changes to the rear dormers.

  Received 16 Sep, published by the council 17 Sep 2026 Amendments
• 2026/3909/P Awaiting decision

  15 Belsize Park Mews London NW3 5BL

  Variation of Condition 2 (Approved Plans) of planning reference 2023/3492/P dated 07/08/26 for erection of roof extension, new basement level, alterations to fenestration and associated works. NAMELY: to allow revisions to the external architectural treatment of approved development.

  Received 10 Sep, published by the council 17 Sep 2026 Amendments
• 2026/2771/P Granted

  Land to the North of the British Library 96 Euston Road London NW1 2DB

  Non material amendment to planning permission 2022/1041/P dated 17/07/2024 for: ‘Demolition of the British Library Centre for Conservation, alterations to the British Library and erection of a new building of 12 above-ground storeys and two basement levels for use as library, galleries, learning, business and events spaces (Class F1) and retail and commercial spaces (Class E); provision of internal and external public spaces, landscaping and a community garden; improvement works adjacent to Dangoor Walk; provision of cycle and car parking and servicing facilities including new crossovers; provision of Crossrail 2 infrastructure; means of access; and associated works’. The amendment is to revise the wording of condition 3 (Crossrail 2 Infrastructure) and partially discharge the condition in respect of perimeter piling works.

  Received 2 Jul, published by the council 24 Jul 2026 Amendments
• 2026/3509/P Granted

  Flat A 55 Leverton Street London NW5 2NX

  Non-material amendment to planning permission 2026/0413/P dated 12/05/2026 (Erection of a single storey side and rear extension, re-construction of rear garden boundary wall, replacement of a ground floor rear window with an access door, replacement of a side door with a window, insertion of two rooflights and reinstatement of front sash windows), namely reduction in depth of proposed lightwell between existing rear elevation and new extension.

  Received 4 Sep, published by the council 7 Sep 2026 Amendments
• 2026/2957/P Granted

  Land to the North of the British Library 96 Euston Road London NW1 2DB

  Non material amendment to planning permission 2022/1041/P dated 17/07/2024 for: ‘Demolition of the British Library Centre for Conservation, alterations to the British Library and erection of a new building of 12 above-ground storeys and two basement levels for use as library, galleries, learning, business and events spaces (Class F1) and retail and commercial spaces (Class E); provision of internal and external public spaces, landscaping and a community garden; improvement works adjacent to Dangoor Walk; provision of cycle and car parking and servicing facilities including new crossovers; provision of Crossrail 2 infrastructure; means of access; and associated works’. The amendment is to revise the wording of condition 6 (Water Main) and discharge the condition.

  Received 14 Jul, published by the council 24 Jul 2026 Amendments