3 Holly Mount London Camden NW3 6SG

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

• 2026/2623/P 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 various internal works

  Submitted 23 Jun 2026 Householder
• 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. 13 Jul 2026

   Received by Camden

2. 24 Jul 2026

   Added to PlanIndex

3. 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 42 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 heritage and listed building applications in a median of 55 days. More in our guide to how long planning decisions take.

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

• 3 Holly Mount London Camden NW3 6SG

  2026/2623/P Submitted 23 Jun 2026 50 yards away

  88% historically approved · decision due ~7 Sep

  Erection of mansard roof extension, raising of chimneys, opening of second-floor rear window, as well as various internal works

  Awaiting decision Householder Extension Loft or dormer +1 29 docs
  Domestic

• 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

  91% 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

• 2026/3449/L Awaiting decision

  Alexandra & Ainsworth TRA Hall 100 Rowley Way London NW8 0SW

  Reconstuction of roof loggia and roof lantern drainage channel pursuant to planning permission ref 2023/3413/P and listed building consent ref 2023/4012/L granted on 18/12/2024, for various works of roof repair and replacement.

  Received 18 Sep, published by the council 21 Sep 2026 Heritage and listed buildings
• 2026/3087/L Granted

  205 Albany Street London NW1 4AB

  Installation of a free standing air source heat pump in the rear courtyard. Installation of an innovative, thin and flexible PV panels to the flat section of the roof

  Received 21 Jul, published by the council 24 Jul 2026 Heritage and listed buildings
• 2026/4003/L Awaiting decision

  10 Sicilian Avenue London Camden WC1A 2QH

  Internal alterations to ground floor and basement level, including new partitions and mechanical ventillation.

  Received 16 Sep, published by the council 21 Sep 2026 Heritage and listed buildings
• 2026/4002/L Awaiting decision

  Flat A 4 Rowley Way London NW8 0SF

  Internal refurbishment including replacement of non-original kitchen and bathroom fittings, repair and refinishing of original internal timber joinery, replacement of floor finishes and internal redecoration.

  Received 16 Sep, published by the council 21 Sep 2026 Heritage and listed buildings
• 2026/3990/L Awaiting decision

  Unison Centre 130 Euston Road London Camden NW1 2AY

  Repair and refurbishment works.

  Received 15 Sep, published by the council 21 Sep 2026 Heritage and listed buildings