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Planning application

2020/3559/P

15 Belsize Square London NW3 4HT

Granted Camden Full applications

Proposal

Conversion of 2 flats at upper ground and 1st floor levels to form 1 self-contained maisonette (Class C3).

As published by the council, reference 2020/3559/P

Timeline

Dates from the published record

  1. 6 Oct 2020

    Decision issued: Granted

  2. 22 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

About full applications applications

How this application type works

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

Nearby applications

Within 500 metres

  • 2014/3310/T Granted

    15 A Belsize Square London NW3 4HT

    (TPO Ref 27H) FRONT GARDEN: 1 x Silver Birch - Reduce back to previous reduction point

    20 Jun 2014 0m away Trees
  • 2021/1799/T Granted

    15 Belsize Square London NW3 4HT

    FRONT GARDEN: 1 x Silver Birch - Lift low branches to a height of 3m. Crown reduce by up to 20%.

    7 May 2021 0m away Trees
  • 2020/1958/P Withdrawn

    16 Belsize Square

    Replacement of windows and doors with double glazed windows and doors.

    18 Mar 2021 6m away Full applications
  • 2015/5005/P Granted

    Flat B 14 Belsize Square London NW3 4HT

    Alterations to rear ground floor elevation to allow installation of bi-folding doors and extended balcony with associated balustrade.

    18 Nov 2015 10m away Full applications
  • 2014/4848/P Granted

    14 Belsize Square London NW3 4HT

    Retention of new garden shed and proposed planting on roof, to be utilised as a design studio and storage space (Retrospective).

    10 Oct 2014 10m away Full applications
  • 2019/3404/P Granted

    Flat 1 13 Belsize Square London NW3 4HT

    Replacement of the existing lower ground floor front and side elevation timber sash windows with double glazed timber sash windows, replacement of the existing lower ground floor timber windows and doors with metal double glazed windows and doors, removal of the peddle dash to the rear bay window for smooth render and associated external alterations.

    25 Sep 2019 19m away Full applications

In Camden

  • 2026/0743/P Granted

    34-42 Middlesex House Cleveland Street London W1T 4JE

    Details pursuant to Condition 6 (Living Roof) of planning permission 2024/2020/P granted on 12/09/2024 "(Minor refurbishment and rooftop works including: upgraded entrance and reception area; new cycle storage and associated end of trip facilities; new/replaced rooftop plant and plant enclosures; creation of a rooftop amenity area with pavilion structure; hard and soft rooftop landscaping; and all associated and ancillary works)."

    25 Feb 2026 Full applications
  • 2026/3202/P Awaiting decision

    Flat 1 94 Goldhurst Terrace London NW6 3HS

    Erection of a single storey rear extension.

    30 Jul 2026 Full applications
  • 2026/0335/P Granted

    216A West End Lane London NW6 1UX

    Conversion of 1 x 7 bedroom flat (C3) and 1 x 2 bedroom flat (C3) to 1 x 7 bedroom House in Multiple Occupation (Sui-generis) and 1 x 1 bedroom flat (C3) and installation of four rooflights

    28 Jan 2026 Full applications
  • 2026/3229/P Awaiting decision

    52 Neal Street London WC2H 9PA

    Alterations to the shopfront and installation of awnings.

    29 Jul 2026 Full applications
  • 2026/2160/P Granted

    120 College Place London NW1 0DJ

    Erection of a rear roof extension, formation of a rear roof terrace and installation of 2x rooflights to front roof slope, and associated works.

    28 May 2026 Full applications