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Planning application

15 Belsize Park Mews London NW3 5BL

Granted Camden 2023/3492/P Full applications

Works: Extension Windows or glazing

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Erection of roof extension, new basement level, alterations to fenestration and associated works.

As published by the council, reference 2023/3492/P

Application record

Reference
2023/3492/P
Category
Full applications
Status
Final Decision
Decision
Granted Subject to a Section 106 Legal Agreement
Decided
7 Aug 2024
Postcode
NW3 5BL

Site history

Applications at this address on the Camden register

This site has had 2 applications since 2024: 1 approved, 0 refused.

  • 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.

    Submitted 10 Sep 2026 Amendments

Timeline

Dates from the published record

  1. 7 Aug 2024

    Decision issued: Granted Subject to a Section 106 Legal Agreement

  2. 22 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 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.

    Submitted 10 Sep 2026 Amendments

What this grant of permission means

Camden granted permission on 7 August 2024, 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

  • 15 Belsize Park Mews London NW3 5BL

    2026/3909/P Submitted 10 Sep 2026 0m away

    98% historically approved · decision due ~9 Nov

    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.

    Awaiting decision Amendments Extension Windows or glazing 10 docs

  • 1 Baynes Mews London NW3 5BH

    2026/2015/P Submitted 19 May 2026 6m away

    Erection of rear dormers, creation of sunken roof terrace, installation of rooflights and replacement of garage door.

    Granted Householder Loft or dormer 25 docs
    Domestic

  • 2 Baynes Mews London NW3 5BH

    2026/0796/P Submitted 27 Feb 2026 6m away

    Erection of rear dormers, creation of sunken roof terrace, installation of rooflights, conversion of garage into habitable room and replacement of garage door.

    Granted Householder Loft or dormer 23 docs
    Domestic

  • 3 Baynes Mews London NW3 5BH

    2023/1043/P 7m away

    Garage conversion into habitable space and continued use of the property as a single dwellinghouse, installation and replacement of windows on the front elevation at first floor level and replacement of the front door and garage doors at ground floor level.

    Granted Full applications Windows or glazing
    Small domestic

  • 3 Baynes Mews London NW3 5BH

    2024/0923/P Submitted 7 Mar 2024 7m away

    Details of secure and covered cycle storage area required by condition 4 (cycle storage) of planning permission 2023/4925/P dated 04/03/2024 (for the variation of condition 2 (approved plans) of planning permission 2023/1043/P for 'Garage conversion into habitable space and continued use of the property as a single dwellinghouse, installation and replacement of windows on the front elevation at first floor level and replacement of the front door and garage doors at ground floor level', namely to erect a rear dormer and enlarge the timber entrance door.)

    Granted Full applications Loft or dormer Windows or glazing 1 doc
    Small domestic

  • 3 Baynes Mews London NW3 5BH

    2023/4925/P Submitted 17 Nov 2023 7m away

    Variation of condition 2 (approved plans) of planning permission 2023/1043/P for 'Garage conversion into habitable space and continued use of the property as a single dwellinghouse, installation and replacement of windows on the front elevation at first floor level and replacement of the front door and garage doors at ground floor level', namely to erect a rear dormer and enlarge the timber entrance door.

    Granted Amendments Loft or dormer Windows or glazing 14 docs
    Small domestic

In Camden

  • 2026/3898/P Awaiting decision

    98 Marchmont Street London WC1N 1AG

    Installation of a new kitchen extraction and ventilation system to the rear of the premises, including associated external ductwork, extraction plant and ancillary equipment.

    16 Sep 2026 Full applications
  • 2026/2709/P Awaiting decision

    166A Camden Street London NW1 9PT

    Change of use from Use Class E to C3 Residential, demolition of existing store and office space, and erection of a three-bedroom dwellinghouse.

    16 Sep 2026 Full applications
  • 2026/3994/P Awaiting decision

    Euston Tower 286 Euston Road London NW1 3DP

    Details to discharge Condition 23 (LUL Subculture) of planning reference 2023/5240/P dated 26/01/26 for redevelopment of Euston Tower comprising retention of parts of the existing building (including central core, basement and foundations) and erection of a new building incorporating these retained elements, to provide a 32-storey mixed-use building providing offices and research and development floorspace (Class E(g)) and office, retail, caf?? and restaurant space (Class E) and Enterprise Space (Class E/F) at ground and first floors, and associated external terraces; public realm enhancements, including new landscaping and provision of new publicly accessible steps and ramp; short and long stay cycle storage; servicing; refuse storage; plant and other ancillary and associated work.

    15 Sep 2026 Full applications
  • 2026/3993/P Awaiting decision

    Euston Tower 286 Euston Road London NW1 3DP

    Details to discharge Condition 22 (LUL Infrastructure) of planning reference 2023/5240/P dated 26/01/26 for redevelopment of Euston Tower comprising retention of parts of the existing building (including central core, basement and foundations) and erection of a new building incorporating these retained elements, to provide a 32-storey mixed-use building providing offices and research and development floorspace (Class E(g)) and office, retail, caf?? and restaurant space (Class E) and Enterprise Space (Class E/F) at ground and first floors, and associated external terraces; public realm enhancements, including new landscaping and provision of new publicly accessible steps and ramp; short and long stay cycle storage; servicing; refuse storage; plant and other ancillary and associated work.

    15 Sep 2026 Full applications
  • 2026/3861/P Awaiting decision

    Beaumont Court 1-45 College Grove London NW1 0RW

    Installation of condensors and minor alterations to elevations at lower floors.

    15 Sep 2026 Full applications