21 Belsize Square London NW3 4HT

This site has had 5 applications since 2011: 2 approved, 3 refused.

• 2019/2496/P Refused

  21 Belsize Square London NW3 4HT

  Proposed Single Storey Rear Extension

  Decided 17 Nov 2021 Householder
• 2018/3229/P Refused

  21 Belsize Square London NW3 4HT

  Erection of single storey rear extension

  Decided 26 Oct 2018 Full applications
• 2017/5806/P Granted

  21 Belsize Square London NW3 4HT

  Erection of a single storey rear extension

  Decided 13 Nov 2017 Full applications
• 2011/2872/P Refused

  21 Belsize Square London NW3 4HT

  Erection of side extension to ground floor of existing dwelling house (Class C3)

  Decided 29 Jul 2011 Full applications

1. 6 Sep 2018

   Decision issued: Granted

2. 22 Jul 2026

   Added to PlanIndex

Camden granted permission on 6 September 2018, 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.

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.

• 21 Belsize Square London NW3 4HT

  2017/5806/P 0m away

  Erection of a single storey rear extension

  Granted Full applications Extension
  Small domestic

• 21 Belsize Square London NW3 4HT

  2018/3229/P 0m away

  Erection of single storey rear extension

  Refused Full applications Extension
  Small domestic

• 21 Belsize Square London NW3 4HT

  2011/2872/P 0m away

  Erection of side extension to ground floor of existing dwelling house (Class C3)

  Refused Full applications Extension
  Domestic

• 21 Belsize Square London NW3 4HT

  2019/2496/P Submitted 13 May 2019 2m away

  Proposed Single Storey Rear Extension

  Refused Householder Extension 12 docs
  Small domestic

• Flat 5, 22 Belsize Square, London, NW3 4HT

  2017/1821/P 2m away

  Installation of x1 rooflight at rear roofslope.

  Granted Full applications Loft or dormer

• Flat 5 22 Belsize Square London NW3 4HT

  2014/5550/P 2m away

  Replacement of front and rear timber balcony doors & windows, replacement of steel framed balustrades with frameless glass balustrade, and lowering of parapet walls.

  Granted Full applications Windows or glazing

• 2026/2516/P Withdrawn

  31 Loveridge Road London Camden NW6 2DU

  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.

  16 Jun 2026 Full applications
• 2026/3830/P Awaiting decision

  Euston Tower 286 Euston Road London NW1 3DP

  Deed of variation to allow more flexibility with Affordable housing payments 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, café 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.

  4 Sep 2026 Full applications
• 2026/3282/P Granted

  5 Berkley Road London NW1 8XX

  Installation of 1no. above ground gas riser from the basement flat to the meter box at first floor (retrospective)

  31 Jul 2026 Full applications
• 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”

  9 Feb 2026 Full applications
• 2026/2697/P Awaiting decision

  Flat 1, 73 Eton Avenue London NW3 3EU

  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.

  3 Sep 2026 Full applications