Planning application
91 Ashmill Street London NW1 6RA
Works: Extension Loft or dormer
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 9th October 2024 (RN:24/04970/FULL) for Erection of rear extension to lower ground floor flat. Namely, correction to the roof plan layout to align with the approved site plan, including two rooflights and amendments to the green roof layout, with the inclusion of gravel for fire safety.
As published by the council, reference 26/02874/NMA
Application record
- Reference
- 26/02874/NMA
- Type
- Non-material amendments
- Status
- Pending
- Received
- 30 Apr 2026
- Validated
- 30 Apr 2026
- Ward
- Church Street
- Postcode
- NW1 6RA
Site history
Applications at this address on the Westminster register
This site has had 3 applications since 2026.
-
26/04137/FULL Decided
91 Ashmill Street London NW1 6RA
Variation of condition 1 of planning permission dated 8th October 2024 (RN 24/04970/FULL) for the erection of rear extension to lower ground floor flat. NAMLEY, to change the design of the rear doors.
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26/02873/FULL Awaiting decision
91 Ashmill Street London NW1 6RA
Installation of a air conditioning unit and acoustic enclosure.
Timeline
Dates from the published record
-
30 Apr 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 25 June 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 91 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
USL Architects Agent, an architecture practice
36 applications on PlanIndex · across 13 councils · 79% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
7 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 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 81 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 0.3 miles
-
91 Ashmill Street London NW1 6RA
88% historically approved · decision due ~8 Jul
Installation of a air conditioning unit and acoustic enclosure.
Awaiting decision Full applications 15 docs -
85 Ashmill Street London NW1 6RA
93% historically approved · decision due ~5 Jun
Amendments to planning permission dated 15th August 2024 (RN:24/04547/FULL) for Alterations to front railings, new entrance gate and steps, including wheelchair stairlift to entrance to 85, new rear door to 85 and new rear ramp and patio. Namely, additional wall-fixed handrail to proposed stairs.
Awaiting decision Amendments 7 docs -
91 Ashmill Street London NW1 6RA
88% historically approved · decision due ~18 Aug
Variation of condition 1 of planning permission dated 8th October 2024 (RN 24/04970/FULL) for the erection of rear extension to lower ground floor flat. NAMLEY, to change the design of the rear doors.
Decided Full applications Extension -
5 Alpha House 1 Ashbridge Street London NW8 8AF
Infill of existing balcony at second floor level on Ashmill Street elevation with windows to create additional internal living space.
Granted Full applications Extension Windows or glazing 8 docs -
7 Alpha House 1 Ashbridge Street London NW8 8AF
Erection of ground floor rear extension providing additional floorspace to an existing flat.
Granted Full applications Extension 9 docs -
1 Alpha House 1 Ashbridge Street London NW8 8AF
Erection of ground floor rear extension providing additional floorsapce to an existing flat.
Granted Full applications Extension 11 docs
Other amendment applications
In Westminster
-
26/07459/NMA Awaiting decision
1 Hanover Square London W1S 1HA
Amendments to planning pemrission dated 10 October 2025 (RN: 25/01558/FULL) for the: Partial demolition, refurbishment and extension of the existing building to provide a sub-basement, basement, ground plus eight storey building; infilling and stepped rear extension; excavation of a new sub-basement level; installation of new plant equipment at basement and roof level; terraces at fourth, fifth, sixth, seventh and eighth floor levels; soft and hard landscaping; reprovision of car parking; new cycle parking facilities; and associated external works. Use of the building for retail and/or restaurant (Class E) on part ground floor and office (Class E) on all other floors. NAMELY, to allow alterations to the design of the ground floor frontages on Hanover Square and St George Street.
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26/07438/NMA Awaiting decision
29 - 31 Hill Street London W1J 5LS
Amendments to planning permission dated 1st July 2025 (RN 25/01006/FULL) for the external alterations at roof level including the creation of Level 04 roof terrace for use in association with existing office (Class E), replacement and installation of new plant and landscaping, replacement of windows, introduction of louvres, removal and replacement of rooflights, installation of new rooflight and other associated works. NAMELY, for alterations comprising of the removal of window sash boxes and weights, changes to the window mullion arrangement, the removal of two sash windows, the installation of secondary glazing, the removal of existing chamber hatch and installation of extract vent and integrated bench, the external replacement of rainwater goods and hoppers, the removal of bricks and installation of airbricks, minor demolition works, replacement of roof covering, removal of ductwork, roof plant rearrangement, the installation of a new external door to plant area, minor layout alterations and other associated works.
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26/07389/NMA Decided
Flat 1 5 Grittleton Road London W9 2DD
Amendments to planning permission dated 04 June 2025 (RN: 25/02022/FULL), NAMELY, amendment of Condition 4 to correct the property address from 9 Aldridge Road Villas to Flat 1 5 Grittleton Road.
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26/07377/NMA Awaiting decision
60 Ledbury Road London W11 2AJ
Amendments to planning permission dated 2nd October 2025 (RN 25/04018/FULL) for the Partial demolition, refurbishment, and erection of a mansard roof extension to form a new third floor with dormers to front, side and rear elevations; to form 6 flats (Class C3) on upper floors; external plant equipment and ductwork; lower ground floor excavation to increase floor to ceiling height; replacement windows; cycle parking and associated external alterations; use of the part ground floor and lower ground floor as retail and restaurant (Class E). Site includes 60-68 Ledbury Road) NAMELY, An amendment to the basement and ground floor drawing reference numbers; amendment to the description of development, in reference to restaurant and or retail use; and amendments to C
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26/07375/NMA Awaiting decision
77 Hereford Road London W2 5BB
Amendments to planning permission dated 4th August 2026 (RN 26/03970/FULL) for the Replacement of roof terrace access stair with glazed hatch, new timber decking and front and rear roof railings to roof terrace, with infilling side window of closet wing. NAMELY, Hinged hatch access substituted by sliding hatch.