Flat A 21 Mornington Crescent London NW1 7RG

This site has had 2 applications since 2025.

• 2025/4167/P Awaiting decision

  Flat A 21 Mornington Crescent London NW1 7RG

  Conversion of maisonette into two self contained flats at ground and lower ground, replacement of window with door and infill at lower ground floor and cycle storage to rear

  Submitted 1 Oct 2025 Full applications

1. 19 Sep 2025

   Received by Camden

2. 7 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 24 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 2 December 2025, 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.

• 21 Mornington Crescent London Camden NW1 7RG

  2024/1729/P 50 yards away

  Erection of outbuilding to the rear of garden for use as a studio office with associated landscaping.

  Withdrawn Full applications

• Flat A 21 Mornington Crescent London NW1 7RG

  2025/4167/P Submitted 1 Oct 2025 50 yards away

  91% historically approved · decision due ~2 Dec

  Conversion of maisonette into two self contained flats at ground and lower ground, replacement of window with door and infill at lower ground floor and cycle storage to rear

  Awaiting decision Full applications New dwelling Extension +1 8 docs

• Flat A, 21 Mornington Crescent Camden London NW1 7RG

  2025/0938/L 50 yards away

  Conversion of existing maisonette to two self-contained flats, excavation of existing front cellar vaults to accommodate bathroom and utility room and infill of front lightwell under entrance footbridge

  Withdrawn Heritage and listed buildings New dwelling Extension

• 21 Mornington Crescent London NW1 7RG

  2021/2654/P 50 yards away

  Two storey rear extension at lower and ground floor level and associated works and the reconfiguration of the internal layout.

  Withdrawn Full applications Extension

• 21 Mornington Crescent London NW1 7RG

  2022/0055/L 50 yards away

  Construction of an outbuilding to the rear of garden for the use as a studio office including associated landscaping. See planning permission application 2021/5608/P for associated plans and documents

  Withdrawn Heritage and listed buildings

• 21 Mornington Crescent London NW1 7RG

  2023/0439/P Submitted 31 Jan 2023 50 yards away

  Construction of a rear extension at ground level and lower ground floor level.

  Granted Full applications Extension 20 docs

• 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