Royal Institute Of British Architects 66 Portland Place London W1B 1AD
Approved on 12 August 2026
2 conditions
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)
- Submitted
- 22 June 2026
- Council
- City of Westminster
- ReceivedSubmitted22 Jun
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided12 Aug
Decided in 51 days
About this application
This is a planning application at Royal Institute Of British Architects 66 Portland Place London W1B 1AD. Westminster has handled 27,108 applications of this type. This one was decided in 51 days. The site is in the Harley Street conservation area, with 8 listed buildings nearby. There have been 22 other applications at this address. We hold 372 applications in total for the W1B postcode area.
Application details
- Postcode
- W1B 1AD
Site constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Harley Street
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (21)
flood storage areas, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.
A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.
Data © Crown copyright and others · sources and licences
Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.
© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.
© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.
© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.
Contains Ordnance Survey data © Crown copyright and database right 2026.
Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.
Associated applications
- 202622 Jun
Removal of an existing roof lantern and infilling of the opening with a new insulated timber roof…
ApprovedApplicationPart of26/04081/FULL - 202622 Jun
Removal of an existing roof lantern and infilling of the opening with a new insulated timber roof…
This applicationApprovedListed building consent26/04082/LBC
Planning history at this site
20 other applications at this property, newest first.
- 202624 Jul
Details of installation of services and related fixtures pursuant to condition 8 (partial) of listed building…
WithdrawnListed building consent26/04967/ADLBC - 202610 Jun
Details of the new lightning protection pursuant to the partial discharge of condition 7 (part 8) of listed…
ApprovedDischarge of conditions26/03809/ADLBC - 202622 Apr
Details of safe maintenance access systems pursuant to condition 16 (partial) of planning permission dated 10…
ApprovedDischarge of conditions26/02669/ADFULL - 202621 Apr
RIBA C7 Part 8
ApprovedDischarge of conditions26/02621/ADLBC - 202616 Apr
Detailed drawings of the new or adjusted ceilings pursuant to condition 7 (15) of listed building dated 11th…
ApprovedDischarge of conditions26/02506/ADLBC - 202610 Apr
Detailed drawings of the proposed works to the new and adjusted ceilings in the highly significant spaces…
ApprovedDischarge of conditions26/02376/ADLBC - 20268 Apr
RIBA LBC C8
ApprovedDischarge of conditions26/01923/ADLBC - 20267 Apr
Details of refuse and recycling storage pursuant to condition 11 of planning permission dated 10 June 2025…
ApprovedDischarge of conditions26/02297/ADFULL - 20267 Apr
Detailed drawings to show the buildings areas of high significance and details of the position, type, and…
ApprovedDischarge of conditions26/02280/ADLBC - 202611 Mar
Details of new windows including new fire-fighting core windows pursuant to Condition 16 (part 3) of planning…
ApprovedDischarge of conditions26/01587/ADFULL - 202610 Mar
Details of the new internal secondary glazing pursuant to discharge of condition 7 (Part 10) of listed…
ApprovedDischarge of conditions26/01527/ADLBC - 202610 Mar
Detailed drawings to show the building's areas of high significance and details of the position, type, and…
ApprovedDischarge of conditions26/01528/ADLBC - 202610 Mar
Details of the new windows including new fire-fighting core windows pursuant to discharge of condition 7…
ApprovedDischarge of conditions26/01525/ADLBC - 20263 Mar
Details of the new external fire escape stairs pursuant to Condition 16 (Part 4) of planning permission dated…
ApprovedDischarge of conditions26/01321/ADFULL - 20263 Mar
Details of the new pavement lights and supporting structure in the Weymouth Street lightwell pursuant to…
ApprovedDischarge of conditions26/01322/ADFULL - 20263 Mar
Details of the new or adjusted balustrades and railings pursuant to Condition 16 (Part 6) of planning…
ApprovedDischarge of conditions26/01325/ADFULL - 20263 Mar
Details of the mew awnings to Weymouth Street pursuant to Condition 16 (Part 7) of Planning Permission dated…
ApprovedDischarge of conditions26/01326/ADFULL - 202627 Feb
Details of the new awnings on Weymouth Street lightwell pursuant to Condition 7 (Part 7) of listed building…
ApprovedListed building consent26/01260/ADLBC - 202627 Feb
Details of the new external fire escape stairs pursuant to Condition 7 (Part 4) of listed building consent…
ApprovedListed building consent26/01257/ADLBC - 202627 Feb
Details of the new pavement lights and supporting structure in the Weymouth Street lightwell pursuant to…
ApprovedListed building consent26/01258/ADLBC
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- Royal Institute Of British Architects 66 Portland Place London W1B 1AD26/01326/ADFULL · ConditionsApproved0.0 mi
- Royal Institute Of British Architects 66 Portland Place London W1B 1AD26/01325/ADFULL · ConditionsApproved0.0 mi
- Royal Institute Of British Architects 66 Portland Place London W1B 1AD26/04967/ADLBC · ConditionsWithdrawn0.0 mi
- Royal Institute Of British Architects 66 Portland Place London W1B 1AD24/05117/LBC · HeritageRefused0.0 mi
- Royal Institute Of British Architects 66 Portland Place London W1B 1AD26/01322/ADFULL · ConditionsApproved0.0 mi
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- Orient Construction Consultancy LimitedVerifiedLondon3.6 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering5.8 mi
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