Flat A 21 Mornington Crescent London NW1 7RG

This site has had 2 applications since 2025.

• 2025/4472/L Awaiting decision

  Flat A 21 Mornington Crescent London NW1 7RG

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

  Submitted 19 Sep 2025 Heritage and listed buildings

1. 1 Oct 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 full applications in a median of 56 days. More in our guide to how long planning decisions take.

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. 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  Withdrawn Full applications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 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  Withdrawn Heritage and listed buildings New dwelling Extension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  Withdrawn Full applications Extension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  Withdrawn Heritage and listed buildings

• Flat A 21 Mornington Crescent London NW1 7RG

  2025/4472/L Submitted 19 Sep 2025 50 yards away

  96% historically approved · decision due ~2 Dec

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

  Awaiting decision Heritage and listed buildings New dwelling Extension +1 1 doc

• 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

• 2026/0369/P Granted

  Railway embankment and land west of 49 Adelaide Road London NW3 3QB

  Installation of a new DNO (Distribution Network Operator) cabinet and erection secure access gate to Adelaide Road, erection of staircase to railway embankment, associated works.

  Received 17 Jul, published by the council 24 Jul 2026 Full applications
• 2026/3694/P Granted

  19 Charterhouse Street London EC1N 6RA

  Details pursuant to condition 19 (external lighting) of planning permission 2025/1683/P, granted subject to a legal agreement on 05/06/2026, for remodelling, refurbishment and extensions (including 3 additional storeys) of the existing building to provide Use Class E (commercial, retail/restaurant and jewellery workspace) and associated landscaping and facade works.

  Received 27 Aug, published by the council 5 Sep 2026 Full applications
• 2026/3904/P Granted

  14 Templewood Avenue London NW3 7XA

  Details pursuant to Condition 5 (Tree protection measures) of planning permission 2026/2315/P dated 10/08/2026 for "Erection of an orangery/outbuilding in the rear garden."

  Received 9 Sep, published by the council 11 Sep 2026 Full applications
• 2025/2002/P Granted

  11 Doughty Street London WC1N 2PL

  Change of use from office (Class E) to residential to form a single-family dwelling (Class C3); associated internal and external alterations

  Received 9 May, published by the council 22 Jul 2026 Full applications
• 2026/3551/P Granted

  19 Charterhouse Street London EC1N 6RA

  Details pursuant to condition 21 (Details of gates/barriers onto Charterhouse Street) of planning permission 2025/1683/P, granted subject to a legal agreement on 05/06/2026, for remodelling, refurbishment and extensions (including 3 additional storeys) of the existing building to provide Use Class E (commercial, retail/restaurant and jewellery workspace) and associated landscaping and facade works.

  Received 19 Aug, published by the council 22 Aug 2026 Full applications