York Mansions Chiltern Street London W1U 5AL

1. 16 Jan 2023

   Received by Westminster

2. 1 Feb 2023

   Validated

   Checked as complete and ready for consideration.

3. 15 Feb 2023

   Decision issued: Application Permitted

4. 1 Aug 2026

   Added to PlanIndex

Westminster granted permission on 15 February 2023, 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.

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

• 7 York Mansions Chiltern Street London W1U 5AL

  03/04543/FULL Submitted 10 Jun 2003 50 yards away

  Installation of boiler flue, ventilation extract and replacement of rear window at first floor level.

  Granted Full applications Windows or glazing 6 docs

• 7 York Mansions Chiltern Street London W1U 5AL

  03/04432/LBC Submitted 6 Jun 2003 50 yards away

  Alterations including division of window to balcony at rear, installation of gas and electric meters and boiler flue extractor fan outlets on balcony, modifications to internal layout and new front door.

  Decided Heritage and listed buildings Windows or glazing 5 docs

• Flat 4b Block 4 Portman Mansions Chiltern Street London W1U 6NS

  26/01860/FULL Submitted 23 Mar 2026 50 yards away

  87% historically approved · decision due ~2 Jun

  Like for like replacement of nine windows at lower ground floor level.

  Awaiting decision Full applications Windows or glazing 11 docs

• 120 Baker Street London W1U 6TU

  26/05756/LBC Submitted 21 Aug 2026 50 yards away

  90% historically approved · decision due ~19 Oct

  Replacement shopfront, including Internal alterations and installation of associated signage. (Linked with 26/05775/FULL & 26/05776/ADV)

  Awaiting decision Heritage and listed buildings Windows or glazing 16 docs

• 120 Baker Street London W1U 6TU

  26/05775/FULL Submitted 24 Aug 2026 50 yards away

  87% historically approved · decision due ~19 Oct

  Replacement shopfront, including Internal alterations. (Linked with 26/05756/LBC)

  Awaiting decision Full applications Windows or glazing

• 120 Baker Street London W1U 6TU

  26/05776/ADV Submitted 24 Aug 2026 50 yards away

  84% historically approved · decision due ~19 Oct

  Display of internally illuminated projecting sign, measuring 1160mm x 120mm, display of internally illuminated fascia sign, measuring 6685mm x 1065mm. other associated logos on awning and glazing. (Linked with 26/05756/LBC)

  Awaiting decision Advertising Windows or glazing

• 26/06232/NMA Awaiting decision

  37 Trevor Place London SW7 1LE

  Amendments to planning permission dated 17th July 2026 (RN 26/03030/FULL) for the Alterations including enlargement of louvres and installation of new plant in basement; landscaping of roof terrace; second floor windows replaced with door sets; partial demolition at ground and first floor levels to create new lightwell and landscaped courtyard. NAMELY, addition of a free-standing sauna to the second-floor roof terrace.

  Received 11 Sep, published by the council 21 Sep 2026 Amendments
• 26/06256/NMA Awaiting decision

  Queens Court Queensway London W2 4QN

  Amendments to planning permission dated 21st May 2026 (RN:25/05013/FULL) for Variation of conditions 1, 3, 8, 9 and 17 of planning permission dated 11th May 2022 (RN 18/09765/FULL) for the Change of use of rear part of Queensway Market to Retail, Financial and Professional services, Office and Restaurant (within Class E) use and 5 residential units facing Princes Court, reconfiguration of retail units along Queensway including introduction of Retail uses at Nos.23 and 33 (current entrances to Queensway Market) and use of Nos.25 and 41-43 Queensway as Restaurant uses, installation of new shopfronts to Nos.23 to 43 Queensway 23-43, erection of infill extension to rear at ground floor level, erection of two new pavilion structures for Retail use and associated new hard and soft landscaping on land between Queens Court and Princes Court, installation of green roofs, rooflights and mechanical plant within enclosures to first floor level roofs between projecting rear wings of Queens Court installation of kitchen extract ducts to rear elevations, and associated cycle parking, waste storage, plant and other ancillary alterations ('Application 2'). Namely, to vary the hours of operation for the refrigeration plant controlled by condition 6.

  Received 11 Sep, published by the council 21 Sep 2026 Amendments
• 26/06251/NMA Awaiting decision

  19 Cumberland Street London SW1V 4LS

  Amendments to planning permission dated 20th March 2026 (RN:25/08960/FULL) for Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment, namely the change of conservatory gable roof to a flat GRP roof.

  Received 11 Sep, published by the council 18 Sep 2026 Amendments
• 26/06201/NMA Awaiting decision

  Almack House 28 King Street St James's London SW1Y 6QW

  Amendments to planning permission dated 16th April 2026 (RN:26/01487/FULL) for Installation of a mechanical plant at lower ground floor and installation of two grilles to two lower ground floor windows, namely change to approved grille.

  Received 10 Sep, published by the council 17 Sep 2026 Amendments
• 26/06212/NMA Awaiting decision

  10 - 11 Lancaster Gate London W2 3LH

  Amendment to Condition 12 (Whole Life Carbon) of planning permission dated 19th April 2024 (RN 23/04044/FULL) for Change of use from hotel to residential use (Class C3) with associated internal alterations to create 11 new units and external alterations comprising reconfiguration and recladding of the rear extension and restoration of the existing building. Namely to include additional requirement to evidence and justify where benchmarks cannot be achieved, consider mitigation measures and if none, evidence that all mitigation measures have been exhausted. (Linked with RN 26/06213/ADFULL)

  Received 10 Sep, published by the council 17 Sep 2026 Amendments