12 Rosslyn Mews London NW3 1NN

1. 17 Oct 2023

   Received by Camden

2. 1 Nov 2023

   Validated

   Checked as complete and ready for consideration.

3. 22 Dec 2023

   Decision issued: Granted

4. 22 Jul 2026

   Added to PlanIndex

Camden granted permission on 22 December 2023, 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.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 5 Rosslyn Mews London NW3 1NN

  2016/1454/P 50 yards away

  Variation of Condition 4 (approved plans) of planning permission 2014/7873/P dated 22/07/2015 (for Alterations at roof level including the creation of a terrace and amendments to the elevations of the building); changes include the omission of the roof stair enclosure, alterations to the oriel bay window and other associated internal and external modifications to the building including changes to fenestration.

  Granted Full applications Windows or glazing

• 9A Rosslyn Mews London NW3 1NN

  2010/1906/A 50 yards away

  Retention of 1 x internally illuminated box sign below existing fascia sign (sign 1) on street frontage and 1 x internally illuminated projecting sign at entrance to beauty parlour (sign 2).

  Split decision

• 12 Rosslyn Mews London Camden NW3 1NN

  2022/3765/P 50 yards away

  Raising of front and rear mansard roof slopes to enclose a roof terrace with 1.8m louvres on front, rear and sides. Removal of external spiral staircase on 3rd floor rear balcony and small extension on 3rd floor at rear to provide internal access to roof terrace. Provision of replacement windows on front elevation (1st, 2nd and 3rd floor), window alterations to first floor rear extension and new front door on ground floor at rear.

  Refused Full applications Extension Loft or dormer +1

• 5 Rosslyn Mews London NW3 1NN

  2014/7873/P 50 yards away

  Alterations at roof level to include a raised parapet, external stair enclosure, replacement rooflight and the creation of a terrace with screening. Amendments to the elevations of the building to make good with white render, removal and relocation of windows, removal of the slate cladding on the rear and associated works.

  Granted Full applications Loft or dormer Windows or glazing

• 10 Rosslyn Hill London NW3 1NN

  2010/4543/P 50 yards away

  Change of use from two self-contained residential units into a single dwelling house (Class C3) and associated alterations to rear elevation lower ground floor bay window.

  Granted Full applications Windows or glazing
  Domestic

• Ground Floor Premises 5/6 Rosslyn Mews London NW3 1NN

  2013/5949/P 50 yards away

  Change of use of ground floor from office (Class B1a) to provide additional residential accommodation for an existing self-contained unit at first and second floor levels (Class C3).

  Granted Full applications

• 2026/4031/P Awaiting decision

  10 Albert Street London NW1 7NZ

  Erection of an extension to widen rear dormer window at second floor.

  Received 2 Oct, published by the council 6 Oct 2026 Householder
• 2026/3231/P Granted

  9 Wadham Gardens London NW3 3DN

  Replacement rear timber casement window, installation of timber-panelled side access door, replacement of existing front boundary gates and piers, installation of metal railings, provision of reclaimed Yorkstone paving to the front garden and associated works.

  Received 30 Jul, published by the council 9 Aug 2026 Householder
• 2026/4030/P Awaiting decision

  6 Leverton Street London NW5 2PJ

  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 Householder
• 2026/3493/P Granted

  2 Wildwood Terrace London NW3 7HT

  Enlargement of the existing rear French doors and single-leaf door at lower ground floor level, together with the replacement of five rear timber sash windows.

  Received 14 Aug, published by the council 22 Aug 2026 Householder
• 2026/2003/P Granted

  23 Glenmore Road London NW3 4BY

  Installation of external AC unit with acoustic enclosure to rear garden.

  Received 29 May, published by the council 24 Jul 2026 Householder