Planning application
26/04082/LBC
Royal Institute Of British Architects 66 Portland Place London W1B 1AD
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
Timeline
Dates from the published record
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22 Jun 2026
Received by Westminster
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21 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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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)
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25/07571/ADLBC Awaiting decision
Royal Institute Of British Architects 66 Portland Place London W1B 1AD
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 and detailed drawings a plan to show the buildings areas of high significance and details of the position, type and method of installiation of services pursuant to Conditions 7 and 8 of Listed Building Consent dated 11 June 2025 (RN25/01205/LBC)
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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)
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26/03809/ADLBC Awaiting decision
Royal Institute Of British Architects 66 Portland Place London W1B 1AD
Details of the new lightning protection pursuant to the partial discharge of condition 7 (part 8) of listed building consent dated 11th June 2025 (RN: 25/01205/LBC).
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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)
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25/07253/ADLBC Awaiting decision
Royal Institute Of British Architects 66 Portland Place London W1B 1AD
Details of new external external fire escape stairs, new pavement lights and supporting stucture in the Weymouth Street lightwell, new or adjusted balustrades and railings, new guardrail and glass balustrade in the library new bonze grilles in the Florence Hall floor and alterations to the sgtage in the Jarvis Hall and a plan to show the building's area of high significance and details of the position, type and method of installation of services and related fixtures, including any fire safety works in the areas designed as high significance pursuant to Conditions 7 (4, 5, 6, 11, 12 and 13) and 8 of Listed Building Consent dated 11 June 2025 (RN25/01205/LBC)
Other heritage and listed buildings applications
In Westminster
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26/04984/LBC Awaiting decision
47G Randolph Avenue London W9 1BQ
Installation of replacement fire surround.
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26/04997/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of a morning room side extension. (Linked to 26/04996/FULL)
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26/04979/LBC Awaiting decision
12 Brewer Street London W1F 0SF
Internal alterations including removal of internal enclosures; Replacement flooring, shelving and slatwall systems, staircase handrail repair and other associated joinery works.
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26/04987/LBC Awaiting decision
Basement And Ground Floor 8 Ganton Street London W1F 7QL
Repainting of the existing timber shopfront, hand-painted fascia lettering, installation of a new hanging sign using the existing projecting sign bracket, and installation of a discreet fascia-mounted LED trough light.
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26/04995/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of rear conservatory extensions and an entrance loggia to side with roof terrace above, together with associated landscaping and alterations. (Linked with 26/04994/FULL)