3 Holly Mount London Camden NW3 6SG

This site has had 4 applications since 2026: 1 approved, 0 refused.

• 2026/2942/L Awaiting decision

  3 Holly Mount London Camden NW3 6SG

  Erection of mansard roof extension, raising of chimneys, opening of second-floor rear window, as well as internal works including removing of partition walls and expansion staircase

  Submitted 13 Jul 2026 Heritage and listed buildings
• 2026/0299/L Granted

  3 Holly Mount London Camden NW3 6SG

  Widening of the opening between the front and the rear room at ground floor level.

  Decided 4 Mar 2026 Heritage and listed buildings
• 2025/2123/P Awaiting decision

  3 Holly Mount London Camden NW3 6SG

  Proposed internal alterations to the Ground floor and Lower ground floor. External alterations include; enclosure of the rear areaway, widening of openings at Ground floor, construction of parapet wall to the rear closet wing, reinstate window arch at 1st floor, installation of rooflight to the rear bathroom.

  Full applications

1. 23 Jun 2026

   Received by Camden

2. 13 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 24 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 7 September 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Camden took a median of 43 days over the applications it decided in the last year.

This application is with Camden for determination, against a statutory target of eight weeks. Over the last year Camden decided householder applications in a median of 66 days. More in our guide to how long planning decisions take.

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.

• 3 Holly Mount London Camden NW3 6SG

  2026/2942/L Submitted 13 Jul 2026 50 yards away

  96% historically approved · decision due ~7 Sep

  Erection of mansard roof extension, raising of chimneys, opening of second-floor rear window, as well as internal works including removing of partition walls and expansion staircase

  Awaiting decision Heritage and listed buildings Extension Loft or dormer +1 2 docs

• 3 Holly Mount London NW3 6SG

  2025/2158/L 50 yards away

  96% historically approved

  Proposed internal alterations to the Ground floor and Lower ground floor. External alterations include; enclosure of the rear areaway, widening of openings at Ground floor, construction of parapet wall to the rear closet wing, reinstate window arch at 1st floor, installation of rooflight to the rear bathroom.

  Awaiting decision Heritage and listed buildings Loft or dormer Windows or glazing

• 3 Holly Mount London Camden NW3 6SG

  2025/2123/P 50 yards away

  92% historically approved

  Proposed internal alterations to the Ground floor and Lower ground floor. External alterations include; enclosure of the rear areaway, widening of openings at Ground floor, construction of parapet wall to the rear closet wing, reinstate window arch at 1st floor, installation of rooflight to the rear bathroom.

  Awaiting decision Full applications Loft or dormer Windows or glazing

• 3 Holly Mount London Camden NW3 6SG

  2026/0299/L Submitted 26 Jan 2026 50 yards away

  Widening of the opening between the front and the rear room at ground floor level.

  Granted Heritage and listed buildings 13 docs

• 3 Holly Mount London NW3 6SG

  2025/5668/L Submitted 15 Dec 2025 50 yards away

  Details of condition 4 (doors, floors and bricks) of listed building consent (2025/2158/L) granted on 22/10/2025 for 'Internal and external alterations including the widening of existing openings and increasing the height of the closet wing to the rear and replacement skylight'

  Granted Heritage and listed buildings 19 docs

• 4 Holly Mount London Camden NW3 6SG

  2023/1926/L 50 yards away

  Creation of en-suite bathroom within existing modern roof extension.

  Granted Heritage and listed buildings Extension

• 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