Planning application
26/04634/NMA
126 - 134 Baker Street London W1U 6SH
Proposal
Amendments to planning permission dated 10th November 2015 (RN:15/07396/FULL) for Erection of three storey extension at the rear of the building at second, third and fourth floor level and use of enlarged second to fourth floors as 11 flats (Class C3). Installation of plant within existing roof top plant room and plant within existing stairwell at roof level. Installation of photovoltaic panels and living roof at roof level and new entrance doors at ground floor level. Namely, changes to the extension at the rear of the building to alter the external appearance from a brick finish to a render finish, removal of two windows to side elevation to the extension to the rear of the building, replacement of existing retained windows to rear elevation (in lieu of installation of secondary internal glazing) and removal of the cycle store at second floor level.
As published by the council, reference 26/04634/NMA
Timeline
Dates from the published record
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10 Jul 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 amendments applications
How this application type works
An amendment application changes a permission that already exists. Non-material amendments cover small adjustments with no wider effect, while minor material amendments, usually made by varying a condition, allow modest design changes without a fresh application. Anything beyond that needs a new permission, so the scope here is deliberately narrow.
Nearby applications
Within 500 metres
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26/02263/ADV Awaiting decision
Globe 43 Marylebone Road London NW1 5JY
Display of externally illuminated projecting sign measuring 0.9m X 1.2m, externally illuminated fascia sign measuring 6.203m X 0.705m, 2.563m X 0.3m, 1.25m X 0.9m, non illuminated fascia sign measuring 1.2m X 0.2m, 0.25m X 0.25m,0.47m X 0.9m, internally illuminated other sign measuring 1.88m X 0.6m, 1.415m X 0.6m, internally illuminated fascia sign measuring 0.377m X 0.5m and non illuminated other sign 0.261m X 0.187m
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25/06866/TCA Withdrawn
Flat 4a Block 4 Portman Mansions Chiltern Street London W1U 6NS
2 x Shrub/Trees ? Reduce in height and lateral spread by 1-2 metres ? back to previous.
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25/06645/FULL Granted
119 - 121 Baker Street London W1U 6RY
Variation of condition 5 of planning permission dated 9th October 2023 (RN:23/05841/FULL) for the Variation of Condition 5 of planning permission dated 23rd September 2021 (RN:21/05354/FULL) which in itself was a variation of a previous permission for the: Use of an area of the public highway measuring 1.2m x 11.0m for the placing of 4 tables, 16 chairs and 2 planters in connection with the existing ground floor use, to allow use of the public pavement may continue until 30 September 2025. NAMELY, to allow the use of the public highway to continue for a further 2 year period (Application under Section 73 of the Act)
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26/01860/FULL Awaiting decision
Flat 4b Block 4 Portman Mansions Chiltern Street London W1U 6NS
Like for like replacement of nine windows at lower ground floor level.
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26/02665/ADV Awaiting decision
119 - 121 Baker Street London W1U 6RY
Display of four externally illuminated fascia signs, two measuring 0.375m x 0.6m, and two measuring 0.15m x 2.275m; an internally illuminated fascia sign measuring 0.735m x 0.735m; two internally illuminated projecting signs measuring 0.6m x 0.6m. [Linked to 26/02664/FULL]
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25/05513/TELNOT Decided
Marylebone Road London
The installation of 1 no. 4G/5G cell antenna upon the existing Street Lamp unit. installation of 2 no. radio units upon the existing Street Lamp unit. The installation of 1 no. BBU upon the existing Street Lamp unit and associated ancillary equipment on Marylebone Road.
Other amendments applications
In Westminster
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26/04962/NMA Awaiting decision
Serpentine Gallery Kensington Gardens Exhibition Road London W2 3XA
Amendments to planning permission dated 27 February 2025 (RN: 24/08940/FULL) for the installation of temporary art sculpture from 24 March 2025 to 09 September 2025; NAMELY to extend the temporary planning consent until 21st March 2027.
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26/04951/NMA Awaiting decision
43 - 45 Portman Square London W1H 6LY
Amendments to planning permission dated 22 April 2026 (25/06153/FULL) for: Variation of Condition 1 of planning permission dated 7 April 2025 (24/04987/FULL) for: Partial demolition of the existing roof and removal of plant equipment; construction of a roof extension providing new office (Class E) floorspace with associated external amenity spaces and plant equipment; refurbishment of the existing building, including infilling of the existing atrium; alterations to the existing façade; provision of cycle parking spaces and end of journey facilities, and all associated and ancillary works NAMELY; to amend the wording of Condition 27 to allow basement demolition work to proceed.
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26/04873/NMA Awaiting decision
Orbis House 5 Mansfield Street London W1G 9NG
Amendments to planning permission dated 05 September 2024 (RN: 24/01895/FULL) for: new courtyard surface including walk-on rooflight; window and door alterations; new window to Mansfield Mews at second floor level; new rooflights; repairs to roof and external brickwork; erection of new staircase in front area lightwell; partial infill of rear lightwell at ground floor level; erection of roof terrace; installation of PV panels at roof level; and associated works namely; to allow provision of guarding system to provide safe access for maintenance across the roof; alteration at south elevation omitting window SFW11 from the new WC, remove the existing RWP from the internal courtyard corner, removal of the existing plastic section of a redundant vent pipe at lower level and retain original lead; new cast iron rain water pipes at west elevation; and internal layout alterations at basement, ground, 2nd, 3rd floors. (Linked with 26/04876/LBC)
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26/04870/NMA Awaiting decision
34 Park Street London W1K 2JD
Amendments to planning permission dated 8 May 2026 (25/07808/FULL) for general refurbishment and M&E upgrade of the office building namely; roof walkable skylight, GF meeting room wall mounted TV, garden bench and planters, fire lobbies, L4 glass partition, reception to hall door swing change, front lightwell electric cupboard change, wall panelling on LGF and L5, LGF modular screen, LGF courtyard window door infill, and LGF cove lighting.
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26/04816/NMA Awaiting decision
Ebury Bridge Estate Ebury Bridge Road London SW1W 8PX
Amendments to planning permission dated 21 July 2023 (RN:23/00331/COOUT) for a mixed use development in outline for residential floorspace and ancillary residential facilities (Class C3) non-residential floorspace comprising flexible retail (Classes A1 - A4), community (Class D1), leisure (Class D2) and workspace (Class B1) floorspace; provision of basement; new pedestrian and vehicular access; and associated amenity space, open space, plant, landscaping, car and cycle parking, refuse storage, servicing area, and other associated infrastructure works; and detailed planning consent for Blocks 7 and 8 comprising residential floorspace and ancillary residential facilities (Class C3); provision of a basement; new pedestrian and vehicular access; and associated amenity space landscaping, car and cycle parking, refuse storage, servicing area, and other associated infrastructure works, namely amendments to the approved Masterplan Phasing to incorporate enabling works and piling in Phase 2a and 3a.