Third Floor And Fourth Floor Rear 128 Mount Street London W1K 3NU

This site has had 2 applications since 2025: 2 approved, 0 refused.

• 25/05410/FULL Granted

  Third Floor And Fourth Floor Rear 128 Mount Street London W1K 3NU

  Replacement of existing access hatch, ladder and internal loft with an Automatic Opening Vent with retractable ladder and integrated handrail (Linked 25/05411/LBC)

  Decided 23 Oct 2025 Full applications

1. 1 Aug 2025

   Received by Westminster

2. 29 Sep 2025

   Decision issued: Application Permitted

3. 21 Jul 2026

   Added to PlanIndex

• 25/05410/FULL Granted

  Third Floor And Fourth Floor Rear 128 Mount Street London W1K 3NU

  Replacement of existing access hatch, ladder and internal loft with an Automatic Opening Vent with retractable ladder and integrated handrail (Linked 25/05411/LBC)

  Decided 23 Oct 2025 Full applications

1 later application on the register refers to this one:

• 25/05410/FULL Granted

  Third Floor And Fourth Floor Rear 128 Mount Street London W1K 3NU

  Replacement of existing access hatch, ladder and internal loft with an Automatic Opening Vent with retractable ladder and integrated handrail (Linked 25/05411/LBC)

  Decided 23 Oct 2025 Full applications

Westminster granted permission on 29 September 2025, 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.

• Third Floor And Fourth Floor Rear 128 Mount Street London W1K 3NU

  25/05410/FULL Submitted 1 Aug 2025 50 yards away

  Replacement of existing access hatch, ladder and internal loft with an Automatic Opening Vent with retractable ladder and integrated handrail (Linked 25/05411/LBC)

  Granted Full applications 21 docs

• 128 Mount Street London W1K 3NU

  25/04553/ADFULL Submitted 2 Jul 2025 50 yards away

  Details of waste and recycling storage pursuant to Condition 7 of planning permission dated 7th January 2025 (RN: 24/06686/FULL)

  Granted Full applications 9 docs

• 35 Berkeley Square London W1J 5BF

  25/07217/LBC Submitted 6 Oct 2025 50 yards away

  Installation of new office partitions to rear wing at ground floor level, and replacement of front step overcladding. General internal refit, reservicing and redecoration.

  Granted Heritage and listed buildings 52 docs

• 34 Berkeley Square London W1J 5BF

  26/03168/LBC Submitted 13 May 2026 50 yards away

  90% historically approved · decision due ~8 Jul

  To create openings in, and remove walls on the fourth floor to improve the efficiency of the office space.

  Awaiting decision Heritage and listed buildings 8 docs

• 34 Berkeley Square London W1J 5BF

  22/03792/FULL Submitted 10 Jun 2022 50 yards away

  Various external works to include hand-rail, emergency lights, grating and opaque window film.

  Granted Full applications Windows or glazing 15 docs

• 125 Mount Street London W1K 3NS

  10/08112/FULL Submitted 22 Sep 2010 50 yards away

  Installation of plant equipment at rear basement level and alterations to shopfront.

  Granted Full applications Windows or glazing 12 docs

• 26/07529/LBC Awaiting decision

  69 Eaton Place London SW1X 8DF

  Installation of new cast iron water supply pipe on rear courtyard elevation. (Linked with 26/07528/FULL)

  Received 5 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
• 26/07509/LBC Awaiting decision

  Buckingham Palace The Mall London SW1A 1AA

  Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07508/FULL)

  Received 4 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
• 26/07473/LBC Awaiting decision

  Flat 3 82 New Cavendish Street London W1G 9TA

  Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07472/FULL)

  Received 3 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
• 26/07471/LBC Awaiting decision

  12 Queen Anne's Gate London SW1H 9AA

  Excavation of single-storey basement, internal reconfiguration and installation of modern services. (Linked with 26/07470/FULL)

  Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
• 26/07461/LBC Awaiting decision

  1 Savile Row London W1S 3JR

  Minor internal works comprising redecoration and upgrades to lighting, flooring and bathroom and kitchen facilities, together with external works including new lighting and signage.

  Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings