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Planning application

Royal Institute Of British Architects 66 Portland Place London W1B 1AD

Awaiting decision Westminster 26/04082/LBC Heritage and listed buildings

Works: Loft or dormer Windows or glazing

Relates to 26/04081/FULL

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Removal of an existing roof lantern and infilling of the opening with a new insulated timber roof construction at third floor roof level; replacement of three existing rooflights with new thermally improved rooflights at fifth floor roof level; and associated repair, waterproofing and roof works at 66 Portland Place. (Linked with 26/04081/FULL)

As published by the council, reference 26/04082/LBC

Application record

Reference
26/04082/LBC
Category
Heritage and listed buildings
Status
Pending
Received
22 Jun 2026
Validated
22 Jun 2026
Postcode
W1B 1AD

Site history

Applications at this address on the Westminster register

This site has had 29 applications since 2025: 5 approved, 0 refused.

  • 26/04967/ADLBC Withdrawn

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Details of installation of services and related fixtures pursuant to condition 8 (partial) of listed building consent dated 10 June 2025 (RN: 25/01205/LBC)

    Submitted 24 Jul 2026
  • 26/04081/FULL Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Removal of an existing roof lantern and infilling of the opening with a new insulated timber roof construction at third floor roof level; replacement of three existing rooflights with new thermally improved rooflights at fifth floor roof level; and associated repair, waterproofing and roof works at 66 Portland Place. (Linked with 26/04082/LBC)

    Submitted 22 Jun 2026 Full applications
  • 26/03809/ADLBC Decided

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Details of the new lightning protection pursuant to Condition 7 (part 8) (part) of listed building consent dated 11th June 2025 (RN:25/01205/LBC).

    Submitted 10 Jun 2026
  • 26/02669/ADFULL Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Details of safe maintenance access systems pursuant to condition 16 (partial) of planning permission dated 10 June 2025 (RN: 25/01204/FULL).

    Submitted 22 Apr 2026 Full applications
  • 26/02621/ADLBC Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Details of safe maintenance access systems pursuant to the partial discharge of condition 7 (Part 8) of listed building consent dated 11th June 2025 (RN: 25/01205/LBC).

    Submitted 21 Apr 2026 Conditions
  • 26/02506/ADLBC Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Detailed drawings of the new or adjusted ceilings pursuant to condition 7 (15) of listed building dated 11th June 2025 (RN:25/01205/LBC)

    Submitted 16 Apr 2026 Conditions
  • 26/02376/ADLBC Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Detailed drawings of the proposed works to the new and adjusted ceilings in the highly significant spaces pursuant to the partial discharge of condition 8 of listed building consent dated 11th June 2025 (RN: 25/01205/LBC).

    Submitted 10 Apr 2026 Conditions
  • 26/02297/ADFULL Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Details of refuse and recycling storage pursuant to condition 11 of planning permission dated 10 June 2025 (RN: 25/01204/FULL)

    Submitted 7 Apr 2026 Full applications
  • 26/02280/ADLBC Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Detailed drawings to show the buildings areas of high significance and details of the position, type, and method of installation of services and related fixtures. Pursuant to partially discharge elements of condition 8 of Listed Building Consent dated 11 June 2025 (RN 25/01205/LBC)

    Submitted 7 Apr 2026 Conditions
  • 26/01923/ADLBC Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Detailed drawings of the a plan to show the building's areas of high significance and details of the position, type, and method of installation of services and related fixtures, including any fire safety works, in areas designated as "high significance", with particular regard to the Jarvis and Florence Hall, Main Foyer and Central Staircase pursuant to condition 8 of planning permission dated 11th June 2025 (RN:25/01205/LBC)

    Submitted 24 Mar 2026 Conditions

Timeline

Dates from the published record

  1. 22 Jun 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 17 August 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 91 days over the applications it decided in the last year.

Cases linked to this one on the register

  • 26/04081/FULL Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Removal of an existing roof lantern and infilling of the opening with a new insulated timber roof construction at third floor roof level; replacement of three existing rooflights with new thermally improved rooflights at fifth floor roof level; and associated repair, waterproofing and roof works at 66 Portland Place. (Linked with 26/04082/LBC)

    Submitted 22 Jun 2026 Full applications

1 later application on the register refers to this one:

  • 26/04081/FULL Awaiting decision

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Removal of an existing roof lantern and infilling of the opening with a new insulated timber roof construction at third floor roof level; replacement of three existing rooflights with new thermally improved rooflights at fifth floor roof level; and associated repair, waterproofing and roof works at 66 Portland Place. (Linked with 26/04082/LBC)

    Submitted 22 Jun 2026 Full applications

What happens while it is decided

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.

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

  • Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    26/03809/ADLBC Submitted 10 Jun 2026 50 yards away

    89% historically approved · decision due ~5 Aug

    Details of the new lightning protection pursuant to Condition 7 (part 8) (part) of listed building consent dated 11th June 2025 (RN:25/01205/LBC).

    Decided

  • Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    26/04967/ADLBC Submitted 24 Jul 2026 50 yards away

    89% historically approved · decision due ~18 Sep

    Details of installation of services and related fixtures pursuant to condition 8 (partial) of listed building consent dated 10 June 2025 (RN: 25/01205/LBC)

    Withdrawn

  • Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    25/07571/ADLBC Submitted 20 Oct 2025 50 yards away

    Details of new external fire escape, new pavement lights and supporting structure in the Weymouth Street lightwell, new or adjusted balustrades and railings, new guardrail and glass balustrade, new bronze grilles in the Florence Hall floor, alterations to the stage in the Jarvis Hall pursuant to Conditions 7 (Parts 4, 5, 6, 11, 12 and 13) of listed building consent dated 11 June 2025 (RN: 25/01205/LBC)

    Granted Conditions 7 docs

  • Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    26/02506/ADLBC Submitted 16 Apr 2026 50 yards away

    89% historically approved · decision due ~11 Jun

    Detailed drawings of the new or adjusted ceilings pursuant to condition 7 (15) of listed building dated 11th June 2025 (RN:25/01205/LBC)

    Awaiting decision Conditions 11 docs

  • Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    26/01923/ADLBC Submitted 24 Mar 2026 50 yards away

    89% historically approved · decision due ~3 Jun

    Detailed drawings of the a plan to show the building's areas of high significance and details of the position, type, and method of installation of services and related fixtures, including any fire safety works, in areas designated as "high significance", with particular regard to the Jarvis and Florence Hall, Main Foyer and Central Staircase pursuant to condition 8 of planning permission dated 11th June 2025 (RN:25/01205/LBC)

    Awaiting decision Conditions 29 docs

  • Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    25/07253/ADLBC Submitted 7 Oct 2025 50 yards away

    Details of a plan to show the building's areas of high significance and method of installation of services and related fixtures, including any fire safety works, in areas designated as "high significance", with particular regard to the Jarvis and Florence Hall, Main Foyer and Central Staircase pursuant to Condition 8 (part) of the listed building consent dated 11 June 2025 (RN:25/01205/LBC).

    Granted Conditions 58 docs

In Westminster

  • 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