23 Harrington Square London NW1 2JJ

This site has had 5 applications since 2011: 1 approved, 4 refused.

• 2014/4085/P Refused

  23 Harrington Square London NW1 2JJ

  Erection of single storey rear extension at ground level to residential flat.

  Decided 25 Sep 2014 Full applications
• 2013/7288/P Refused

  23 Harrington Square London NW1 2JJ

  Erection of single storey rear extension at ground level to residential flat.

  Decided 17 Mar 2014 Full applications
• 2013/7517/L Refused

  23 Harrington Square London NW1 2JJ

  Internal and external alteration associated with erection of single storey rear extension at ground floor level to residential flat.

  Decided 17 Mar 2014 Heritage and listed buildings
• 2011/4569/T Granted

  23 Harrington Square London NW1 2JJ

  REAR GARDEN: 1 x Sycamore - Reduce crown by 30%.

  Decided 20 Sep 2011 Trees

1. 25 Sep 2014

   Decision issued: Refused

2. 22 Jul 2026

   Added to PlanIndex

This application is at appeal, which passes the decision from Camden to the planning inspectorate, and the outcome will replace the council's decision. 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.

• 23 Harrington Square London NW1 2JJ

  2013/7288/P 50 yards away

  Erection of single storey rear extension at ground level to residential flat.

  Refused Full applications Extension
  Small domestic

• 23 Harrington Square London NW1 2JJ

  2014/4085/P 50 yards away

  Erection of single storey rear extension at ground level to residential flat.

  Refused Full applications Extension
  Small domestic

• Flats 3 & 4 23 Harrington Square London NW1 2JJ

  2019/5938/L 50 yards away

  To amalgamate Flat 3 and Flat 4 at ground and first floor levels into one flat by adding a ladder.

  Granted Heritage and listed buildings
  Domestic

• 23 Harrington Square London NW1 2JJ

  2013/7517/L 50 yards away

  Internal and external alteration associated with erection of single storey rear extension at ground floor level to residential flat.

  Refused Heritage and listed buildings Extension
  Small domestic

• Flat 3 and Flat 4 23 Harrington Square London NW1 2JJ

  2019/1760/L Submitted 2 Apr 2019 50 yards away

  Installation of a step ladder to amalgamate two flats at ground and first floor levels into one flat in the closet wing.

  Refused Heritage and listed buildings New dwelling 13 docs
  Domestic

• Flats 3 and 4 23 Harrington Square London NW1 2JJ

  2018/5167/L Submitted 24 Oct 2018 50 yards away

  Internal alterations in association with amalgamation of 2 flats into 1 at ground and first floor levels

  Refused Heritage and listed buildings New dwelling 24 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