Planning application
21 Bloomsbury Street London Camden WC1B 3HF
Works: Extension Loft or dormer Windows or glazing
Relates to 2022/4361/P, 2025/3687/P
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Non-material amendments to planning permission 2022/4361/P granted on 09/08/2023, and subsequently amended by non-material amendments consent 2025/3687/P granted on 30/09/2025, for alterations and extensions including an additional storey with pavilion and terraces above and rear (south elevation) extensions with terraces, new and replacement windows and entrance. The proposed non-material amendments include: minor changes to glazing and louvres on both street elevations (LGF, 5th and roof), reduced canopy and amended balustrading to rooftop pavilion, amended lintels and balustrades on rear (south) elevation), marginally increased atrium rooflight on roof.
As published by the council, reference 2026/0763/P
Application record
- Reference
- 2026/0763/P
- Type
- Non Material Amendments
- Status
- Final Decision
- Decision
- Granted
- Received
- 26 Feb 2026
- Validated
- 27 Feb 2026
- Decided
- 13 Apr 2026
- Ward
- Bloomsbury
- Decision by
- Delegated
- Postcode
- WC1B 3HF
Site history
Applications at this address on the Camden register
This site has had 5 applications since 2024: 5 approved, 0 refused.
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2025/4931/P Granted
21 Bloomsbury Street London Camden WC1B 3HF
Installation of a louvre to one window on the Bloomsbury Street elevation and a louvre to one window on the Bedford Avenue elevation (both at lower ground floor level); minor amendment to horizontal glazing bars on two lower ground floor windows
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2024/4765/P Granted
21 Bloomsbury Street London Camden WC1B 3HF
Details pursuant to condition 8 (terrace screens) of planning permission ref. 2022/4361/P granted, subject to a legal agreement, on 09/08/2023, for extensions and alterations (an additional storey with new dormer windows, rooftop pavilion/plant, rear extensions with terraces and associated works to elevations windows/entrances etc)
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2024/4488/P Granted
21 Bloomsbury Street London Camden WC1B 3HF
Details pursuant to condition 11 (cycle parking facilities) of planning permission ref. 2022/4361/P granted, subject to a legal agreement, on 09/08/2023, for extensions and alterations (an additional storey with new dormer windows, rooftop pavilion/plant, rear extensions with terraces and associated works to elevations windows/entrances etc)
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2024/2123/P Granted
21 Bloomsbury Street London Camden WC1B 3HF
Details (drawings and materials) of windows and doors pursuant to condition 4 of planning permission 2022/4361/P granted on 09/08/2023 for 'Alterations to existing building comprising: rear extension at second to fifth floor levels with associated terraces, relocation of existing sixth floor/roof-top plant enclosure and erection of an additional (sixth storey) of offices on the existing roof (with new dormer windows and louvres in the Bedford Avenue and Bloomsbury Street roofs to serve the new sixth floor extension) formation of pavilion, external terraces and green roof at sixth floor level and on roof of new sixth floor extension (and an extended lift over-run), replacement of windows; alterations to entrances; replacement of faux chimney stacks and associated works'
Timeline
Dates from the published record
-
26 Feb 2026
Received by Camden
-
27 Feb 2026
Validated
Checked as complete and ready for consideration.
-
13 Apr 2026
Decision issued: Granted
-
9 Aug 2026
Added to PlanIndex
Related applications
Cases linked to this one on the register
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2022/4361/P Granted
21 Bloomsbury Street London WC1B 3HF
Alterations to existing building comprising: rear extension at second to fifth floor levels with associated terraces, relocation of existing sixth floor/roof-top plant enclosure and erection of an additional (sixth storey) of offices on the existing roof (with new dormer windows and louvres in the Bedford Avenue and Bloomsbury Street roofs to serve the new sixth floor extension) formation of pavilion, external terraces and green roof at sixth floor level and on roof of new sixth floor extension (and an extended lift over-run), replacement of windows; alterations to entrances; replacement of faux chimney stacks and associated works.
-
2025/3687/P Granted
21 Bloomsbury Street London WC1B 3HF
Non-material amendments to planning permission 2022/4361/P granted on 09/08/2023 (for: extensions and alterations including an additional storey with a pavilion and terraces on top and rear (south) extensions to all upper floors with terraces) Proposed amendments are at roof level and on rear elevation and include realignment of windows, with some louvres added, amendments to the roof interfaces (at the gables), amended/additional plant on the roof and setting back of the roof balustrade (east elevation)
Documents
Plans, drawings, consultee responses and the officer's report
12 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 documentsWhat this grant of permission means
Camden granted permission on 13 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
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21 Bloomsbury Street London WC1B 3SS
Installation of 2 x air-conditioning units at roof level including external pipework.
Granted Full applications -
21 Bloomsbury Street London Camden WC1B 3HF
Installation of a louvre to one window on the Bloomsbury Street elevation and a louvre to one window on the Bedford Avenue elevation (both at lower ground floor level); minor amendment to horizontal glazing bars on two lower ground floor windows
Granted Full applications Windows or glazing 12 docs -
21 Bloomsbury Street London WC1B 3HF
Non material amendments to planning permission 2022/4361/P granted on 09/08/2023 for 'Alterations to existing building comprising: rear extension at second to fifth floor levels with associated terraces, relocation of existing sixth floor/roof-top plant enclosure and erection of an additional (sixth storey) of offices on the existing roof (with new dormer windows and louvres in the Bedford Avenue and Bloomsbury Street roofs to serve the new sixth floor extension) formation of pavilion, external terraces and green roof at sixth floor level and on roof of new sixth floor extension (and an extended lift over-run), replacement of windows; alterations to entrances; replacement of faux chimney stacks and associated works'. Proposed amendments consist of : Alterations at lower ground floor level to facilitate installation of a new UKPN substation, including installation of louvres on window and doors and replacement of gate at ground floor level with railings.
Granted Amendments Extension Loft or dormer +1 14 docs -
21 Bloomsbury Street London WC1B 3HF
Non-material amendments to planning permission 2022/4361/P granted on 09/08/2023 (for: extensions and alterations including an additional storey with a pavilion and terraces on top and rear (south) extensions to all upper floors with terraces) Proposed amendments are at roof level and on rear elevation and include realignment of windows, with some louvres added, amendments to the roof interfaces (at the gables), amended/additional plant on the roof and setting back of the roof balustrade (east elevation)
Granted Amendments Extension Windows or glazing 10 docs -
21 Bloomsbury Street London WC1B 3SS
Installation of new condensing units, replacement of air handling unit and associated ducting at roof level of office building (Class B1).
Granted Full applications -
21 Bloomsbury Street London WC1B 3HF
Alterations to existing building comprising: rear extension at second to fifth floor levels with associated terraces, relocation of existing sixth floor/roof-top plant enclosure and erection of an additional (sixth storey) of offices on the existing roof (with new dormer windows and louvres in the Bedford Avenue and Bloomsbury Street roofs to serve the new sixth floor extension) formation of pavilion, external terraces and green roof at sixth floor level and on roof of new sixth floor extension (and an extended lift over-run), replacement of windows; alterations to entrances; replacement of faux chimney stacks and associated works.
Granted Full applications Extension Loft or dormer +1
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