Planning application
26/04081/FULL
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 26/04082/LBC)
As published by the council, reference 26/04081/FULL
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 full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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26/04082/LBC 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 26/04081/FULL)
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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)
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26/04841/ADFULL Granted
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Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.