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 0m 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 12m 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 12m 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 15m 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 15m 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  Withdrawn Full applications Extension Windows or glazing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 15m 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

• 2026/0825/L Granted

  88 Frognal London NW3 6XB

  Discharge of condition 4 (a) Plan, elevation and section drawings of all new internal doors at a scale of 1:10 with typical moulding and architrave details at a scale of 1:1. b) Plan, elevation and section drawings, including jambs, head and cill, of all new windows and doors, including garage doors and windows, at a scale of 1:10 with typical glazing bar details at 1:1) of 2025/3436/L (External works comprising demolition of existing conservatory and erection of single-storey ground floor extension; demolition of existing garage and erection of replacement garage; alterations and repairs to roof; repair and minor alterations to building facade; provision of new hard and soft landscaping. Interior works comprising general remodelling works; minor changes to planform and openings; installation of new mechanical and electrical services throughout)

  2 Mar 2026 Heritage and listed buildings
• 2026/2946/L Awaiting decision

  Flat 1, 73 Eton Avenue London NW3 3EU

  Replacement of existing defective rear lean-to conservatory with a new slimline powder-coated aluminium framed conservatory with clear double glazing, on the exact same footprint as existing.

  3 Sep 2026 Heritage and listed buildings
• 2026/3754/L Awaiting decision

  10 Great Ormond Street London Camden WC1N 3RB

  Coversion of 3 flats into 4 and internal alterations to the listed building

  2 Sep 2026 Heritage and listed buildings
• 2026/2194/L Withdrawn

  Dunboyne Road Estate Dunboyne Road London NW3 2YY

  Installation of Air Source and Water Source Heat Pumps in basement car park with associated acoustic and security enclosures; installation of PV Panels on roof of Blocks 1, 2 and 3; removal of existing gas boilers and associated plant; installation of a new estate-wide heating network including Heat Interface Units, radiators, pipework and associated infrastructure to serve Flats 1-71; excavation of trenches and installation of below-ground heating, water and electrical infrastructure; and associated ancillary works.

  29 May 2026 Heritage and listed buildings
• 2026/3773/L Awaiting decision

  47 Kelly Street London NW1 8PG

  Replacement of concrete roof tiles with slate roof tiles (Retrospective)

  28 Aug 2026 Heritage and listed buildings