3 The Mount Square London NW3 6SU

This site has had 2 applications since 2010: 2 approved, 0 refused.

• 2010/2400/P Granted

  3 The Mount Square London NW3 6SU

  Alterations to increase the height of the existing chimney stack and associated alterations to single dwelling house (Class C3).

  Decided 15 Jul 2010 Full applications

1. 15 Jul 2010

   Decision issued: Granted

2. 22 Jul 2026

   Added to PlanIndex

Camden granted permission on 15 July 2010, 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.

• 3 The Mount Square London NW3 6SU

  2010/2400/P 50 yards away

  Alterations to increase the height of the existing chimney stack and associated alterations to single dwelling house (Class C3).

  Granted Full applications
  Domestic

• 101-103 Heath Street London NW3 6SS

  2013/7472/P 50 yards away

  Change of use from shop (Class A1) to office use (Class B1) at basement, ground and part first floor levels for a temporary period of two years.

  Decided Full applications

• 101-103 Heath Street LONDON NW3 6SS

  2011/4878/P 50 yards away

  Change of use of part first floor level from gallery (Class A1) to residential (Class C3); erection of a two storey rear extension at ground and first floor levels following the demolition of existing single storey rear extension and store rooms in rear yard; associated alterations including alterations to the shopfront, replacement of existing rear second floor window with sliding doors and refurbishment works.

  Granted Full applications Extension Demolition +1
  Small domestic

• 99 Heath Street London NW3 6SS

  2010/6285/P 50 yards away

  Retention of roller shutter to west (The Mount) elevation of existing building (Class A2).

  Refused Full applications

• 99 Heath Street London NW3 6SS

  2010/2055/P 50 yards away

  Retrospective application for installation of windows on rear ground floor level extension within courtyard (north elevation), installation of roller shutter and entrance gate on The Mount frontage (west elevation) and associated alterations to existing building (Class A2)

  Withdrawn Full applications Extension Windows or glazing

• 99 Heath Street London NW3 6SS

  2010/3881/P 50 yards away

  Installation of aluminium louvred opening at roof level and timber louvred door to west side elevation of the existing building (Class A2).

  Granted Full applications

• 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