Planning application
40 Ordnance Hill London NW8 6PU
Works: Extension Loft or dormer Windows or glazing Small domestic
Read from the description, not a valuation. How we read the register
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 15th Septmeber 2025 (RN:25/00867/FULL) for Erection of a single storey rear extension, and part single / part double storey side extension and associated refurbishment works including rear dormer windows, landscaping works, and works to the front and rear facades. Namely, the movement of the proposed rear extension away from the existing garden wall, a series of internal alterations including new dividing walls and some room configurations are proposed, the proposed side and rear windows, and dormer window, are proposed to be provided as metal windows in timber surround, the size of one of the proposed rooflights to the single storey-side extension is to be reduced in response to proposed internal adjustments, the small front elevation window is to be revised from a round window to a square window and proposed that the celestory windows to the side extension are extended below brickwork at first floor level.
As published by the council, reference 25/08158/NMA
Application record
- Reference
- 25/08158/NMA
- Type
- Non-material amendments
- Status
- Pending
- Received
- 7 Nov 2025
- Validated
- 7 Nov 2025
- Ward
- Regent's Park
- Postcode
- NW8 6PU
Site history
Applications at this address on the Westminster register
This site has had 4 applications since 2025: 2 approved, 0 refused.
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26/01713/FULL Awaiting decision
40 Ordnance Hill London NW8 6PU
Variation of conditions 1, 5, 7, 9 of planning permission dated 15th September 2025 (RN 25/00867/FULL) for the Erection of a single storey rear extension, and part single / part double storey side extension and associated refurbishment works including rear dormer windows, landscaping works, and works to the front and rear facades. NAMELY, relocation of the ASHP from the rear garden to the front area and incorporated within the bin and bike storage structure; Relocation of the pedestrian gate from the street into property; Repair to the existing boundary wall; Demolition of remaining flank wall; Widening of driveway entrance; New vehicular and pedestrian gates; Flat roof (set back from front elevation) to step up and party wall to be raised; Demolition of remaining flank wall; Demolition of remaining rear wall; Raising of first floor; Raising of loft floor level; Demolition of roof; Ground floor side extension parapet wall to be raised to align with No. 38 Ordnance Hill; Party Wall raised; and Flat roof (behind raised boundary wall) to step up.
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25/09288/ADFULL Granted
40 Ordnance Hill London NW8 6PU
Details of all foundations within tree root protection areas pursuant to condition 9 of planning permission dated 15 September 2025 (RN: 25/00867/FULL)
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25/06670/ADFULL Granted
40 Ordnance Hill London NW8 6PU
Detailed method statement explaining the measures you will take to protect the trees on and close to the site pursuant to condition 7 of planning permission dated 15th September 2025 (RN:25/00867/FULL).
Timeline
Dates from the published record
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7 Nov 2025
Received by Westminster
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20 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
Decision expected by 2 January 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 66 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Chroma Planning and Development Limited Agent, a planning consultancy registered in London
Active · incorporated 2020 · London
18 applications on PlanIndex · across 9 councils · 82% 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
18 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 54 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
-
40 Ordnance Hill London NW8 6PU
87% historically approved · decision due ~25 Jun
Variation of conditions 1, 5, 7, 9 of planning permission dated 15th September 2025 (RN 25/00867/FULL) for the Erection of a single storey rear extension, and part single / part double storey side extension and associated refurbishment works including rear dormer windows, landscaping works, and works to the front and rear facades. NAMELY, relocation of the ASHP from the rear garden to the front area and incorporated within the bin and bike storage structure; Relocation of the pedestrian gate from the street into property; Repair to the existing boundary wall; Demolition of remaining flank wall; Widening of driveway entrance; New vehicular and pedestrian gates; Flat roof (set back from front elevation) to step up and party wall to be raised; Demolition of remaining flank wall; Demolition of remaining rear wall; Raising of first floor; Raising of loft floor level; Demolition of roof; Ground floor side extension parapet wall to be raised to align with No. 38 Ordnance Hill; Party Wall raised; and Flat roof (behind raised boundary wall) to step up.
Awaiting decision Full applications Extension Loft or dormer +2 55 docsSmall domestic -
36 Ordnance Hill London NW8 6PU
Detailed drawings of hard and soft landscaping schemen pursuant to condition 9 of planning permission dated 29th January 2025 (RN: 24/05632/FULL).
Granted Full applications 4 docs -
40 Ordnance Hill London NW8 6PU
Detailed method statement explaining the measures you will take to protect the trees on and close to the site pursuant to condition 7 of planning permission dated 15th September 2025 (RN:25/00867/FULL).
Granted Full applications Trees 8 docs -
40 Ordnance Hill London NW8 6PU
Details of all foundations within tree root protection areas pursuant to condition 9 of planning permission dated 15 September 2025 (RN: 25/00867/FULL)
Granted Full applications Trees 3 docs -
22 Norfolk Road London NW8 6HG
87% historically approved · decision due ~5 Jun
Installation of a stairlift to front staircase of 22 Norfolk Road. (Linked with 26/01909/LBC)
Awaiting decision Full applications 11 docs -
21 Norfolk Road London NW8 6HG
100% historically approved · decision due ~12 Oct
T3 London Plane x 1 (Platanus x Hispanica) This plane tree is blocking light from the property, suggested works: reduce to most recent reduction points of reduction all around
Awaiting decision Trees 6 docs
Other amendment applications
In Westminster
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26/06232/NMA Awaiting decision
37 Trevor Place London SW7 1LE
Amendments to planning permission dated 17th July 2026 (RN 26/03030/FULL) for the Alterations including enlargement of louvres and installation of new plant in basement; landscaping of roof terrace; second floor windows replaced with door sets; partial demolition at ground and first floor levels to create new lightwell and landscaped courtyard. NAMELY, addition of a free-standing sauna to the second-floor roof terrace.
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26/06256/NMA Awaiting decision
Queens Court Queensway London W2 4QN
Amendments to planning permission dated 21st May 2026 (RN:25/05013/FULL) for Variation of conditions 1, 3, 8, 9 and 17 of planning permission dated 11th May 2022 (RN 18/09765/FULL) for the Change of use of rear part of Queensway Market to Retail, Financial and Professional services, Office and Restaurant (within Class E) use and 5 residential units facing Princes Court, reconfiguration of retail units along Queensway including introduction of Retail uses at Nos.23 and 33 (current entrances to Queensway Market) and use of Nos.25 and 41-43 Queensway as Restaurant uses, installation of new shopfronts to Nos.23 to 43 Queensway 23-43, erection of infill extension to rear at ground floor level, erection of two new pavilion structures for Retail use and associated new hard and soft landscaping on land between Queens Court and Princes Court, installation of green roofs, rooflights and mechanical plant within enclosures to first floor level roofs between projecting rear wings of Queens Court installation of kitchen extract ducts to rear elevations, and associated cycle parking, waste storage, plant and other ancillary alterations ('Application 2'). Namely, to vary the hours of operation for the refrigeration plant controlled by condition 6.
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26/06251/NMA Awaiting decision
19 Cumberland Street London SW1V 4LS
Amendments to planning permission dated 20th March 2026 (RN:25/08960/FULL) for Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment, namely the change of conservatory gable roof to a flat GRP roof.
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26/06201/NMA Awaiting decision
Almack House 28 King Street St James's London SW1Y 6QW
Amendments to planning permission dated 16th April 2026 (RN:26/01487/FULL) for Installation of a mechanical plant at lower ground floor and installation of two grilles to two lower ground floor windows, namely change to approved grille.
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26/06212/NMA Awaiting decision
10 - 11 Lancaster Gate London W2 3LH
Amendment to Condition 12 (Whole Life Carbon) of planning permission dated 19th April 2024 (RN 23/04044/FULL) for Change of use from hotel to residential use (Class C3) with associated internal alterations to create 11 new units and external alterations comprising reconfiguration and recladding of the rear extension and restoration of the existing building. Namely to include additional requirement to evidence and justify where benchmarks cannot be achieved, consider mitigation measures and if none, evidence that all mitigation measures have been exhausted. (Linked with RN 26/06213/ADFULL)