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Planning application

50 Berkeley Street London W1J 8HA

Decided Westminster 26/04542/NMA Amendments

Works: Extension Loft or dormer Demolition

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

Amendments to planning permission dated 01 December 2021 (RN: 20/06093/FULL) for: Erection of two 2 storey infill extensions to the set-back corners at fifth floor level on the Berkeley Street/Mayfair Place elevation and Berkeley Street/Stratton Street elevation, the demolition of the existing mansard roof and its replacement with a single sheer storey (to match the lower floors) on the Mayfair Place elevation and Stratton Street elevation, erection of an additional set back floor at eighth floor level, plus roof top plant room. Associated external alterations, including to existing ground floor entrances, and alterations to the existing plant/ducts. Use of basement (part), ground (part) and 1st to 8th floor as offices (Class E) namely, to allow swapping the male & female shower & change areas; reducing the number of female showers from 11 to 8 - and total showers from 27 to 24; layout changes to location of lockers.

As published by the council, reference 26/04542/NMA

Application record

Reference
26/04542/NMA
Category
Amendments
Status
Decided
Received
8 Jul 2026
Validated
8 Jul 2026
Postcode
W1J 8HA

Site history

Applications at this address on the Westminster register

This site has had 3 applications since 2025: 1 approved, 0 refused.

  • 26/03944/ADFULL Decided

    50 Berkeley Street London W1J 8HA

    Details of a post construction stage report which demonstrates that the development meets an "Excellent" rating under BREEAM UK Refurbishment and Fit-Out (RFO) 2014 pursuant to condition 6 (b) of planning permission dated 1st December 2021 (RN: 20/06093).

    Decided 2 Jul 2026
  • 25/05290/NMA Granted

    50 Berkeley Street London W1J 8HA

    Amendments to planning permission dated 1st December 2021 (RN:20/06093/FULL) for Erection of two 2 storey infill extensions to the set-back corners at fifth floor level on the Berkeley Street/Mayfair Place elevation and Berkeley Street/Stratton Street elevation, the demolition of the existing mansard roof and its replacement with a single sheer storey (to match the lower floors) on the Mayfair Place elevation and Stratton Street elevation, erection of an additional set back floor at eighth floor level, plus roof top plant room. Associated external alterations, including to existing ground floor entrances, and alterations to the existing plant/ducts. Use of basement (part), ground (part) and 1st to 8th floor as offices (Class E). Namely, Alterations to balustrade height, amendments to foam inlets, small roof opening enclosure to north core top roof

    Decided 12 Aug 2025 Amendments

Timeline

Dates from the published record

  1. 8 Jul 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. 9 Aug 2026

    Status changed to Decided

    Previously Pending.

After the decision

Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

About amendment applications

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.

Nearby applications

Within 0.3 miles

  • 50 Berkeley Street London W1J 8HA

    26/03944/ADFULL Submitted 16 Jun 2026 50 yards away

    Details of a post construction stage report which demonstrates that the development meets an "Excellent" rating under BREEAM UK Refurbishment and Fit-Out (RFO) 2014 pursuant to condition 6 (b) of planning permission dated 1st December 2021 (RN: 20/06093).

    Decided
  • 50 Berkeley Street London W1J 8HA

    25/05290/NMA Submitted 29 Jul 2025 50 yards away

    Amendments to planning permission dated 1st December 2021 (RN:20/06093/FULL) for Erection of two 2 storey infill extensions to the set-back corners at fifth floor level on the Berkeley Street/Mayfair Place elevation and Berkeley Street/Stratton Street elevation, the demolition of the existing mansard roof and its replacement with a single sheer storey (to match the lower floors) on the Mayfair Place elevation and Stratton Street elevation, erection of an additional set back floor at eighth floor level, plus roof top plant room. Associated external alterations, including to existing ground floor entrances, and alterations to the existing plant/ducts. Use of basement (part), ground (part) and 1st to 8th floor as offices (Class E). Namely, Alterations to balustrade height, amendments to foam inlets, small roof opening enclosure to north core top roof

    Granted Amendments Extension Loft or dormer +1 19 docs
  • 51 Berkeley Street London W1J 8NL

    26/01614/LBC Submitted 12 Mar 2026 50 yards away

    90% historically approved · decision due ~14 May

    External and internal works including remove existing 3M white reverse cut vinyl texts and replace with suspended statutory signage. Decorations, New flooring to BOH behind self service wall, new secure partitions to fill in void, replace QSP with New Internal ATMs and associated data and power

    Awaiting decision Heritage and listed buildings 11 docs
  • 8 Berkeley Street London W1J 8DN

    05/02888/FULL Submitted 13 Apr 2005 50 yards away

    Alterations to shopfront and entrance.

    Granted Full applications Windows or glazing 6 docs
  • 8 Berkeley Street London W1J 8DN

    05/02889/ADV Submitted 13 Apr 2005 50 yards away

    Display of back lit fascia sign.

    Granted Advertising 7 docs
  • 8 - 9 Berkeley Street London W1J 8DW

    26/01080/ADFULL Submitted 20 Feb 2026 50 yards away

    Detailed drawings and a bio-diversity management plan in relation to the planters and green wall pursuant to condition 10 of planning permission dated 7th January 2025 (RN: 24/07177/FULL)

    Granted Full applications 9 docs

In Westminster

  • 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