Planning application
Rossetti House 106 - 110 Hallam Street London W1W 5HG
Works: Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Amendments to planning permission dated 24 January 2025 (RN: 24/07761/FULL) for, "Replace windows with double glazed windows, convert two windows to AOV's in Staircase 1, convert two windows to fixed louvres in Staircase 2, replace water tanks on the roof, new insulated flat roof and dry riser inlet cabinet to be located on the Hallam Street elevation"; NAMELY to move the dry riser cabinet on the Hallam Street elevation.
As published by the council, reference 26/05425/NMA
Application record
- Reference
- 26/05425/NMA
- Category
- Amendments
- Status
- Pending
- Received
- 10 Aug 2026
- Validated
- 10 Aug 2026
- Postcode
- W1W 5HG
Timeline
Dates from the published record
-
10 Aug 2026
Received by Westminster
-
13 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 5 October 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 61 days over the applications it decided in the last year.
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 amendment applications in a median of 57 days. More in our guide to how long planning decisions take.
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 500 metres
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201 - 203 Great Portland Street London W1W 5AB
87% historically approved · decision due ~7 Jul
Installation of two new louvres to existing lightwell; new entry door to basement from existing lightwell; new louvre doors at ground floor level; replacement of external windows; replacement of external doors; replacement of curtain wall glazing; new lift shaft and overrun at roof level; reconfigured railings at roof level; alterations and reinstatement of existing railings.
Awaiting decision Full applications Windows or glazing 52 docs -
Flat 59 105 Hallam Street London W1W 5HE
Retention of metal balustrade around rear terrace.
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209 Great Portland Street London W1W 5AH
89% historically approved · decision due ~7 Apr
The removal of 3no. antennas, to be replaced with 3no. antennas. Development Ancillary and associated steelworks thereto.
Awaiting decision Telecoms 1 doc -
209 Great Portland Street London W1W 5AH
Amendments to planning permission dated 20/08/2025 (RN: 24/08364/FULL) for, "Relocation of existing louvres from ground floor facade on Great Portland Street to Park Crescent Mews. Installation of 2 new emergency generators at roof level and installation of 2 new external risers from ground to roof level"; NAMELY; amendment to consented electrical and ventilation risers located on the west elevation of the Portland Hospital, to external cable ladder risers.
Granted Amendments 8 docs -
59-61 Bolsover Street And 224-228 Great Portland Street London W1W 5QP
Installation of water/ sprinkler tank and box enclosure housing pipe work on rear elevation. (Retrospective)
Withdrawn Full applications 13 docs -
59-61 Bolsover Street And 224-228 Great Portland Street London W1W 5QP
Installation of screening enclosure around plant room to rear of flat. (Retrospective)
Withdrawn Full applications 15 docs
Other amendment applications
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26/05886/NMA Awaiting decision
10 Spring Gardens London SW1A 2BN
Amendments to planning permission dated 10th July 2025 (RN 25/00695/FULL) for the Use of part-ground, first, sixth, seventh and eighth floor levels as an Embassy (sui generis). Associated external alterations to the ground floor facade on Carlton House Terrace, and part ground floor to Piazza (Spring Gardens) frontage. External alterations to the doors. Installation of roof plant and security screens to the eighth floor. NAMELY, Addition of external attached building signage on West Elevation and South Elevation; Addition of two flagpoles on West Elevation; Addition of a parcel pass through, rather than fixed panel, to door on North Elevation; and omission of smoke vent and replacement with new paving to match existing paving.
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26/05881/NMA Awaiting decision
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Amendments to planning permission dated 11 August 2026 (RN: 26/04158/FULL) for the: Erection of a single-storey rear extension at lower ground floor level; replacement of existing rear window with a door at ground floor level and creation of terrace with associated railings/screening; and associated external alterations. NAMELY, revise the height of the rear elevation kitchen French doors.
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26/05798/NMA Awaiting decision
3 Blenheim Road London NW8 0LU
Amendments to planning permission dated 18th January 2024 (RN:22/04886/FULL) for Excavation of single-storey basement extension with lightwells to front and rear gardens; Erection of single-storey extension to rear and three-storey extension to side; Formation of door to rear at lower ground floor level; Landscaping works; and associated external alterations. Namely, internal alterations and minor adjustment to rooflight position.
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26/05670/NMA Awaiting decision
64 St James's Street London SW1A 1NF
Amendments to planning permission dated 2nd September 2021 (21/02158/FULL) for: Demolition of the existing mansard roof and removal of plant and escape stair; erection of new double mansard roof extension and rear extension for additional commercial floorspace (Use Class E); and installation of new escape stair, rear balconies, roof terrace and associated works namely, amendments to allow for the installation of a condenser unit within the rear lightwell.
-
26/05674/NMA Awaiting decision
52 Eaton Place London SW1X 8AL
Amendments to planning permission dated 25 September 2025 (25/05108/FULL) for: Alterations to rear extension at first floor level including creation of rear roof terrace at second floor level; replacement of first and second floor level front windows with double glazed timber sash windows; replacement of front door; reinstatement of period windows and doors namely, to allow replacement of second floor rear full height sash window with set of french doors.