51 Upper Montagu Street London W1H 1FQ

This site has had 6 applications since 2025: 3 approved, 0 refused.

• 26/06443/ADFULL Awaiting decision

  51 Upper Montagu Street London W1H 1FQ

  Details of Desktop study and Site investigation reports pursuant to partial discharge of Condition 11 (Phase 2 and Phase 3) of planning permission dated 24th October 2025 (RN: 25/03874/FULL).

  Submitted 21 Sep 2026
• 26/00898/ADFULL Awaiting decision

  51 Upper Montagu Street London W1H 1FQ

  Details of supplementary acoustic report, detailed drawings of all new doors and windows, new first floor balconettes and investigative report of Phase 1 pursuant to condition 5, 7, 8 and 11 (part) of planning permission dated 24 October 2025 (RN: 25/03874/FULL).

  Submitted 12 Feb 2026 Full applications
• 26/00814/ADLBC Granted

  51 Upper Montagu Street London W1H 1FQ

  Detailed drawings of new doors, new windows including sections and glazing bar profiles, new skirting, and cornices, new fireplace surrounds, new Juliette balconies pursuant to condition 4 of listed building consent dated 28 October 2025 (RN: 25/03875/LBC)

  Decided 7 Apr 2026 Conditions
• 25/03875/LBC Granted

  51 Upper Montagu Street London W1H 1FQ

  Internal alterations including lowering of the floor level to the lower ground floor; Installation of replacement modern windows with slimline double-glazed units; external alterations to front and rear elevations to reinstate window baskets; installation of an air source heat pump and replacement of existing railings at main roof level; erection of the rear extension at lower ground floor level to include a green roof; and other associated works.

  Decided 6 Oct 2025 Heritage and listed buildings
• 25/03874/FULL Granted

  51 Upper Montagu Street London W1H 1FQ

  Internal alterations including lowering of the floor level to the lower ground floor; Installation of replacement modern windows with slimline double-glazed units; external alterations to front and rear elevations to reinstate window baskets; installation of an air source heat pump and replacement of existing railings at main roof level; erection of the rear extension at lower ground floor level to include a green roof; and other associated works.

  Decided 7 Oct 2025 Full applications

1. 19 Oct 2026

   Received by Westminster

2. 23 Oct 2026

   Validated

   Checked as complete and ready for consideration.

3. 23 Oct 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 18 December 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 86 days over the applications it decided in the last year.

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 119 days. More in our guide to how long planning decisions take.

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.

• 51 Upper Montagu Street London W1H 1FQ

  26/06443/ADFULL Submitted 21 Sep 2026 50 yards away

  89% historically approved · decision due ~16 Nov

  Details of Desktop study and Site investigation reports pursuant to partial discharge of Condition 11 (Phase 2 and Phase 3) of planning permission dated 24th October 2025 (RN: 25/03874/FULL).

  Awaiting decision

• 51 Upper Montagu Street London W1H 1FQ

  26/00898/ADFULL Submitted 12 Feb 2026 50 yards away

  88% historically approved · decision due ~9 Apr

  Details of supplementary acoustic report, detailed drawings of all new doors and windows, new first floor balconettes and investigative report of Phase 1 pursuant to condition 5, 7, 8 and 11 (part) of planning permission dated 24 October 2025 (RN: 25/03874/FULL).

  Awaiting decision Full applications Windows or glazing 11 docs

• 51 Upper Montagu Street London W1H 1FQ

  26/00814/ADLBC Submitted 11 Feb 2026 50 yards away

  Detailed drawings of new doors, new windows including sections and glazing bar profiles, new skirting, and cornices, new fireplace surrounds, new Juliette balconies pursuant to condition 4 of listed building consent dated 28 October 2025 (RN: 25/03875/LBC)

  Granted Conditions Windows or glazing 12 docs

• 51 Upper Montagu Street London W1H 1FQ

  25/03875/LBC Submitted 9 Jun 2025 50 yards away

  Internal alterations including lowering of the floor level to the lower ground floor; Installation of replacement modern windows with slimline double-glazed units; external alterations to front and rear elevations to reinstate window baskets; installation of an air source heat pump and replacement of existing railings at main roof level; erection of the rear extension at lower ground floor level to include a green roof; and other associated works.

  Granted Heritage and listed buildings Extension Windows or glazing 37 docs

• 51 Upper Montagu Street London W1H 1FQ

  25/03874/FULL Submitted 9 Jun 2025 50 yards away

  Internal alterations including lowering of the floor level to the lower ground floor; Installation of replacement modern windows with slimline double-glazed units; external alterations to front and rear elevations to reinstate window baskets; installation of an air source heat pump and replacement of existing railings at main roof level; erection of the rear extension at lower ground floor level to include a green roof; and other associated works.

  Granted Full applications Extension Windows or glazing 36 docs

• 53 Upper Montagu Street London W1H 1SE

  25/05778/ADLBC Submitted 14 Aug 2025 50 yards away

  Details of the height and finished appearance of the new openings at ground and second floor levels, and proposed remedial works required to address damp following inspection works pursuant to Condition 2 (parts i and ii) of the listed building consent dated 2 January 2025 (RN: 24/05972/LBC)

  Granted Conditions 8 docs

• 26/07202/LBC Awaiting decision

  Basement East And Ground Floor And First Floor 33 Weymouth Street London W1G 7BY

  Replacement of 13 doorsets with fire doors.

  Received 21 Oct, published by the council 23 Oct 2026 Heritage and listed buildings
• 26/07183/LBC Awaiting decision

  306 - 308 Regent Street London W1B 3AT

  Installation of a manually operated retractable fabric awning to the existing shopfront at 308 Regent Street, comprising an orange fabric canopy with discreet printed lettering to the front valance, together with associated supporting framework, mounting brackets and fixings to the existing fa?ade.

  Received 21 Oct, published by the council 22 Oct 2026 Heritage and listed buildings
• 26/07191/LBC Awaiting decision

  6 Wilton Place London SW1X 8RH

  Layout alterations and replacement of internal doors.

  Received 21 Oct, published by the council 22 Oct 2026 Heritage and listed buildings
• 26/07199/LBC Awaiting decision

  49 Queen's Gardens London W2 3AA

  Erection of a mansard roof extension incorporating rooflights and a rear balcony; installation of Juliet balconies at ground and first floor levels to the rear; demolition of the existing courtyard extension and erection of a single-storey infill extension; extension of the rear wing at first floor (mezzanine) and second floor levels; fenestration alterations including the installation of new windows; stucco repairs and partial rebuilding of the rear extensions; and associated internal alterations at all levels. (Linked to 26/07198/FULL)

  Received 21 Oct, published by the council 23 Oct 2026 Heritage and listed buildings
• 26/07192/LBC Awaiting decision

  119 Warwick Way London SW1V 4HS

  Conversion and internal alterations to the ground floor flat (Retrospective)

  Received 21 Oct, published by the council 23 Oct 2026 Heritage and listed buildings