27 John Street & 21 John's Mews London WC1N 2BX

This site has had 2 applications since 2017: 2 approved, 0 refused.

• 2017/1959/P Granted

  27 John Street & 21 John's Mews London WC1N 2BX

  Change of use from publisher's office (Class B1) to dwelling house (Class C3); demolition of existing rear extension and erection of new single storey rear extension with associated terrace above and new French windows to provide access; alterations to rear elevation; replacement of metal windows at 21 John's Mews with new timber sash windows; and conversion of garage to habitable room.

  Decided 3 Aug 2017 Full applications

1. 4 Aug 2017

   Decision issued: Granted

2. 22 Jul 2026

   Added to PlanIndex

2 later applications on the register refer to this one:

• 2019/4496/P Granted

  27 John Street London WC1N 2BX

  Change of use from publisher's office (Class B1) to dwelling house (Class C3); demolition of existing rear extension and erection of new single storey rear extension with associated terrace above and new French windows to provide access; alterations to rear elevation; replacement of metal windows at 21 John's Mews with new timber sash windows; and conversion of garage to habitable room (resubmission of previously approved application refs: 2017/1959/P & 2017/2450/L).

  Decided 12 Feb 2020 Full applications
• 2019/5338/L Granted

  27 John Street London WC1N 2BX

  Internal alterations associated with proposed change of use to dwelling house; demolition of existing single storey rear extension and erection of new single storey rear extension with associated terrace above and new French windows to provide access; alterations to rear elevation; replacement of metal windows at 21 John's Mews with new timber sash windows; roof alterations and installation of new rooflight.(resubmission of previously approved application refs: 2017/1959/P & 2017/2450/L).

  Decided 12 Feb 2020 Heritage and listed buildings

Camden granted permission on 4 August 2017, 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.

• 27 John Street London WC1N 2BX

  2020/2530/L 0m away

  Details required by condition 4 parts a (openings between front and rear rooms) and c (details of service runs) of listed building consent ref: 2019/5338/L granted 12/02/2020 (for internal alterations associated with change of use to dwelling house and various extensions and alterations).

  Granted Heritage and listed buildings Extension
  Domestic

• 27 John Street & 21 John's Mews London WC1N 2BX

  2017/1959/P 0m away

  Change of use from publisher's office (Class B1) to dwelling house (Class C3); demolition of existing rear extension and erection of new single storey rear extension with associated terrace above and new French windows to provide access; alterations to rear elevation; replacement of metal windows at 21 John's Mews with new timber sash windows; and conversion of garage to habitable room.

  Granted Full applications Extension Demolition +1
  Small domestic

• 23 John's Mews London WC1N 2PA

  2017/1130/P 6m away

  Retention of rooflight and terrace at roof (third floor) level.

  Granted Full applications Loft or dormer

• 12 Northington Street London WC1N 2NW

  2014/5618/L 12m away

  Erection of mansard roof extension with dormer windows and inset roof terraces at second floor level and associated internal alterations.

  Granted Heritage and listed buildings Extension Loft or dormer +1

• 12 - 14 Northington Street London WC1N 2NW

  2016/5354/P 12m away

  Installation of new pavement slabs in front of dwellings

  Granted Full applications

• 12 Northington Street and 28 John Street London WC1N 1NW

  2013/0964/P 12m away

  Installation of single storey glass conservatory at ground floor level in rear lightwell of 12 Northington Street together with partial infil at first floor level, following removal of existing external staircase and first floor balcony, in addition to various internal alterations and new access door from 28 John Street at roof level to the existing roof terrace of single dwelling house (Class C3).

  Granted Full applications Extension
  Small domestic

• 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