42 & Flat 42A Mornington Terrace London NW1 7RT

This site has had 2 applications since 2025: 2 approved, 0 refused.

• 2025/4917/P Granted

  42 & Flat 42A Mornington Terrace London NW1 7RT

  Amalgamation of two flats to create single dwellinghouse.

  Decided 19 Dec 2025 Full applications

1. 12 Nov 2025

   Received by Camden

2. 19 Dec 2025

   Decision issued: Granted

3. 9 Aug 2026

   Added to PlanIndex

1 later application on the register refers to this one:

• 2026/2468/L Granted

  42 Mornington Terrace London NW1 7RT

  Details pursuant to condition 4 (staircase) of planning permission 2025/5117/L dated 19/12/2025 for ‘Amalgamation of two flats to create single dwellinghouse. Reinstatement of staircase between basement and ground floor.’

  Decided 27 Jul 2026 Heritage and listed buildings

Camden granted permission on 19 December 2025, 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.

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.

• 42 Mornington Terrace London NW1 7RT

  2015/3107/L 50 yards away

  Replacement of existing window and door and replacement of external staircase, at rear ground floor level.

  Granted Heritage and listed buildings Windows or glazing

• 5 Lyndhurst Gardens London NW3 5NS

  2017/1500/T 50 yards away

  REAR GARDEN: 7 x - 1 Row - Leyland Cypress - (Chaemcyparis x leylandii) -reduce height by 50%(3m) 2 x Apple - Reduce all new growth by 25%. 1 x - Bay (Laurus nobilus) - -Trim back to neat rounded shape for regular maintenance.

  Granted Trees

• 42 Mornington Terrace London NW1 7RT

  2021/2190/L 50 yards away

  Installation of temporary internal secondary glazing to eight windows and four mechanical ventilation units to the front of the property at all floors for noise mitigation during construction of the HS2 railway at Euston.

  Granted Heritage and listed buildings Windows or glazing

• 42 Mornington Terrace London NW1 7RT

  2025/2503/T 50 yards away

  FRONT GARDEN: 2 x Magnolia (Magnolia spp) (T1) - Reduce all round back to previous reduction points, approx. 1m leaving furnishing growth. Remove low small limb on back tree.

  Granted Trees

• 42 Mornington Terrace London NW1 7RT

  2015/5310/T 50 yards away

  FRONT GARDEN: 2 x Magnolia - Reduce height and lateral spread by 1.5m

  Granted Trees

• 42 & Flat 42A Mornington Terrace London NW1 7RT

  2025/4917/P Submitted 12 Nov 2025 50 yards away

  Amalgamation of two flats to create single dwellinghouse.

  Granted Full applications New dwelling 10 docs
  Several homes

• 2026/1141/L Granted

  25 John Street London WC1N 2BS

  Internal and external alterations to partition layout at basement, supporting structures and external ground level, and alterations to design of conservatory, windows and doors granted under listed building consent 2024/0338/L dated 06/08/2024.

  Received 26 Mar, published by the council 24 Jul 2026 Heritage and listed buildings
• 2025/1781/L Granted

  Frognal Rise House Lower Terrace London NW3 6RE

  Demolition of existing garage and interlinking gallery and replacement with new garage and garden room with link, new basement floor below garden, alterations to main house including replacement windows including reinstated oriel window and new French doors to entrance elevation, new roofing to side wing, new portico and replacement door to front elevation, enlargement of existing lightwell, replacement gates and canopy over entrance gate, restorations of boundary treatments, associated internal alterations including partial underpinning works and other minor alterations.

  Received 22 Apr, published by the council 22 Jul 2026 Heritage and listed buildings
• 2026/4129/L Awaiting decision

  6 Leverton Street London NW5 2PJ

  Strip out kitchen including floor tiles and replace; replace plumbing and flooring in rear ensuite; replace plumbing in front ensuite and WC; replace internal doors; 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 Heritage and listed buildings
• 2026/1686/L Granted

  Flat Ground and 1st Floor and Flat 2nd and 3rd Floor 14 Downshire Hill London NW3 1NR

  External and internal alterations in connection with conversion of two self-contained flats into a single-family dwellinghouse, including new doors at rear ground and second floor level, replacement windows at rear second and third floors level, removal of internal partitions, extending the stair handrail, and replacement internal doors, parquet flooring, skirting, architraves, cornicing, and fittings.

  Received 19 May, published by the council 24 Jul 2026 Heritage and listed buildings
• 2026/2202/L Refused

  4 Hampstead Square London NW3 1AB

  Erection of conservatory to front elevation.

  Received 27 May, published by the council 24 Jul 2026 Heritage and listed buildings