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Planning application

46 Portland Place London W1B 1NF

Decided Westminster 26/04113/LBC Heritage and listed buildings

Works: Loft or dormer Windows or glazing

Relates to 26/05632/FULL

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

Proposal

New dormer windows, replacement of all non-original windows, previously proposed windows and relevant external glazed doors with new painted windows and new glazed painted external doors that encompass vacuum glazing together with reinstatement of suitable joinery profiles throughout. (Linked with 26/05632/FULL)

As published by the council, reference 26/04113/LBC

Application record

Reference
26/04113/LBC
Category
Heritage and listed buildings
Status
Decided
Received
22 Jun 2026
Validated
24 Aug 2026
Ward
West End
Postcode
W1B 1NF

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2026.

  • 26/05632/FULL Decided

    46 Portland Place London W1B 1NF

    New dormer windows, replacement of all non-original windows, previously proposed windows and relevant external glazed doors with new painted windows and new glazed painted external doors that encompass vacuum glazing together with reinstatement of suitable joinery profiles throughout. (Linked with 26/04113/LBC)

    Decided 12 Oct 2026 Full applications
  • 26/04128/LBC Awaiting decision

    46 Portland Place London W1B 1NF

    Internal alterations to the rear of the first floor, comprising the removal of non-original partitions, fixtures, fittings and doors associated with the existing WC/shower block and kitchen within the closet wing, together with the removal of suspended ceilings to reinstate original ceiling heights in the principal rooms. The works include the installation of a new WC and tea point with associated partitioning, and the formation of a new opening between the library/study and rear seating area, detailed with matching cornices and skirtings to respect the historic character and fabric of the building.

    Submitted 23 Jun 2026 Heritage and listed buildings
  • 26/02183/CLEUD Awaiting decision

    46 Portland Place London W1B 1NF

    Confirmation on planning permission have been lawfully implemented by carrying out a material operation at the site, in accordance with the approved plans (Variation of condition 1 of planning permission dated 29 April 2016 (RN 14/12563/FULL) for the demolition of the rear extension to the building at lower ground, mezzanine, ground and first floor levels and rebuilding to include the creation of a terrace at rear first floor level. Excavation of additional basement levels and installation of plant at main roof and basement level all in association with the use of the property as a single family dwelling (Class C3) from RN 14/12563/FULL. NAMELY, to vary the approved drawings to enable additional excavation at basement levels, installation of photovoltaics at roof level, enlargement of the openings at ground and first floors, to change a window to a door to provide access to the terrace at rear first floor level and to alter the fenestration of the front elevation to the orangery with internal alterations at all floor levels)

    Submitted 1 Apr 2026 Lawful development

Timeline

Dates from the published record

  1. 22 Jun 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. 24 Aug 2026

    Validated

    Checked as complete and ready for consideration.

  4. 12 Oct 2026

    Status changed to Decided

    Previously Pending.

Cases linked to this one on the register

  • 26/05632/FULL Decided

    46 Portland Place London W1B 1NF

    New dormer windows, replacement of all non-original windows, previously proposed windows and relevant external glazed doors with new painted windows and new glazed painted external doors that encompass vacuum glazing together with reinstatement of suitable joinery profiles throughout. (Linked with 26/04113/LBC)

    Decided 12 Oct 2026 Full applications

1 later application on the register refers to this one:

  • 26/05632/FULL Decided

    46 Portland Place London W1B 1NF

    New dormer windows, replacement of all non-original windows, previously proposed windows and relevant external glazed doors with new painted windows and new glazed painted external doors that encompass vacuum glazing together with reinstatement of suitable joinery profiles throughout. (Linked with 26/04113/LBC)

    Decided 12 Oct 2026 Full applications

Documents

Plans, drawings, consultee responses and the officer's report

24 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

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 heritage and listed building applications

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.

Nearby applications

Within 0.3 miles

  • 46 Portland Place London W1B 1NF

    26/04128/LBC Submitted 23 Jun 2026 50 yards away

    90% historically approved · decision due ~18 Aug

    Internal alterations to the rear of the first floor, comprising the removal of non-original partitions, fixtures, fittings and doors associated with the existing WC/shower block and kitchen within the closet wing, together with the removal of suspended ceilings to reinstate original ceiling heights in the principal rooms. The works include the installation of a new WC and tea point with associated partitioning, and the formation of a new opening between the library/study and rear seating area, detailed with matching cornices and skirtings to respect the historic character and fabric of the building.

    Awaiting decision Heritage and listed buildings
  • 46 Portland Place London W1B 1NF

    26/05632/FULL Submitted 18 Aug 2026 50 yards away

    New dormer windows, replacement of all non-original windows, previously proposed windows and relevant external glazed doors with new painted windows and new glazed painted external doors that encompass vacuum glazing together with reinstatement of suitable joinery profiles throughout. (Linked with 26/04113/LBC)

    Decided Full applications Loft or dormer Windows or glazing
  • 46 Portland Place London W1B 1NF

    26/02183/CLEUD Submitted 1 Apr 2026 50 yards away

    84% historically approved · decision due ~27 May

    Confirmation on planning permission have been lawfully implemented by carrying out a material operation at the site, in accordance with the approved plans (Variation of condition 1 of planning permission dated 29 April 2016 (RN 14/12563/FULL) for the demolition of the rear extension to the building at lower ground, mezzanine, ground and first floor levels and rebuilding to include the creation of a terrace at rear first floor level. Excavation of additional basement levels and installation of plant at main roof and basement level all in association with the use of the property as a single family dwelling (Class C3) from RN 14/12563/FULL. NAMELY, to vary the approved drawings to enable additional excavation at basement levels, installation of photovoltaics at roof level, enlargement of the openings at ground and first floors, to change a window to a door to provide access to the terrace at rear first floor level and to alter the fenestration of the front elevation to the orangery with internal alterations at all floor levels)

    Awaiting decision Lawful development Extension Demolition +1 14 docs
    Domestic
  • 44 Portland Place London W1B 1NE

    23/03776/ADLBC Submitted 6 Jun 2023 50 yards away

    Details of new decorative plaster work/restoration works to existing decorative plaster work pursuant to Condition 5 (vii) of planning permission dated 08 February 2023 (RN:22/06619/LBC)

    Granted Conditions 12 docs
  • 52 Portland Place London W1B 1NH

    25/08376/FULL Submitted 17 Nov 2025 50 yards away

    88% historically approved · decision due ~12 Jan

    Internal and external works including demolition, refurbishment, restoration and alterations to 52 Portland Place as well as removal of existing external condensers at basement, ground, third and fourth floor level and provision of new, consolidated plant and screening at basement and third floor level alongside other associated works. (Linked with 25/08377/LBC)

    Awaiting decision Full applications Demolition 41 docs
  • 52 Portland Place London W1B 1NH

    25/08377/LBC Submitted 17 Nov 2025 50 yards away

    90% historically approved · decision due ~12 Jan

    Internal and external works including demolition, refurbishment, restoration and alterations to 52 Portland Place as well as removal of existing external condensers at basement, ground, third and fourth floor level and provision of new, consolidated plant and screening at basement and third floor level alongside other associated works. (Linked with 25/08376/FULL)

    Awaiting decision Heritage and listed buildings Demolition 39 docs

In Westminster

  • 26/05473/LBC Decided

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/06273/FULL)

    Received 12 Aug, published by the council 22 Sep 2026 Heritage and listed buildings
  • 26/07390/LBC Awaiting decision

    40 Wigmore Street London W1U 2RX

    Installation of a non-illuminated fascia sign measuring 0.29m x 0.79m and two vinyl signs applied to inside face of the glazed shopfront each measuring 0.22m x 0.84m. (Linked with 26/06970/ADV)

    29 Oct 2026 Heritage and listed buildings
  • 26/07372/LBC Awaiting decision

    8A Randolph Road London W9 1AN

    Amalgamation of two residential units with internal refurbishment and reconfiguration. (Linked with 26/07371/FULL)

    Received 28 Oct, published by the council 2 Nov 2026 Heritage and listed buildings
  • 26/07332/LBC Awaiting decision

    Royal Courts Of Justice Strand London WC2A 2LL

    Replacement of one platform lift within the grade 1 listed Royal Court?s of Justice building.

    Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings
  • 26/07336/LBC Awaiting decision

    Charing Cross Hotel Strand London WC2N 5HX

    Installation of replacement timber handrail and brackets to one flight of main staircase.

    Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings