Planning application
3 Blenheim Road London NW8 0LU
Works: Extension Loft or dormer 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 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.
As published by the council, reference 26/05798/NMA
Application record
- Reference
- 26/05798/NMA
- Category
- Amendments
- Status
- Pending
- Received
- 24 Aug 2026
- Validated
- 24 Aug 2026
- Postcode
- NW8 0LU
Timeline
Dates from the published record
-
24 Aug 2026
Received by Westminster
-
28 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 19 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 60 days over the applications it decided in the last year.
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
-
3 Blenheim Road London NW8 0LU
89% historically approved · decision due ~21 Oct
Details of Trees pursuant to Condition 10 of planning permission 18 January 2024 (RN:22/04886/FULL)
Awaiting decision Trees -
3 Blenheim Road London NW8 0LU
90% historically approved · decision due ~12 Oct
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; Internal alterations, including changes to planform and replacement of fireplace at lower-ground floor level.
Awaiting decision Heritage and listed buildings ExtensionSmall domestic -
10 Blenheim Road London NW8 0LU
Details of Code of Construction Practice pursuant to condition 19 of planning permission dated 8th June 2022 (RN:21/05522/FULL)
Granted Full applications 6 docs -
9 Blenheim Road London NW8 0LU
87% historically approved · decision due ~20 May
Details of the ways in which you will protect the trees which you are keeping, as shown on drawing 02.010 pursuant to condition 8 of planning permission dated 19th March 2026 (RN:25/08190).
Awaiting decision Full applications Trees 6 docs -
4 Blenheim Road London NW8 0LU
100% historically approved · decision due ~22 Apr
Works: 2 x poplars (rear): crown reduce to previous (most recent) pollard points (at about height of approx. 8m).
Awaiting decision Trees 6 docs -
3 Blenheim Road London NW8 0LU
87% historically approved · decision due ~7 Jul
Details of the ways in which you will protect the trees which you are keeping, as shown on drawing Barrell Plan Ref: 18215-1 pursuant to condition 10 of planning permission dated 18th January 2024 (RN:22/04886/FULL)
Awaiting decision Full applications Trees 10 docs
Other amendments applications
In Westminster
-
26/05881/NMA Awaiting decision
50A Warlock Road London W9 3LW
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.
-
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.
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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.
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26/05586/NMA Awaiting decision
York House 23 Kingsway London WC2B 6UJ
Amendments to planning permission dated 21 November 2025 (RN: 25/04455/FULL) for Alteration and refurbishment of the ground floor entrances on both Kingsway and Kean Street; alterations to the 8th floor rear elevation in association with improved access to the external amenity terrace; installation of air conditioning condensers on the rooftop of the building; and replacement of the associated existing plant screen. Namely, the omission of two dormer windows at 8th floor level
-
26/05578/NMA Awaiting decision
Belgrave House 76 Buckingham Palace Road London SW1W 9AX
Amendments to planning permission dated 16 May 2025 (RN: 24/08150/FULL) for 'Refurbishment of existing building, including alteration to ground floor entrances to west elevation, introduction of louvres on the north and south elevation, revised plant at roof level and use of fifth floor terrace for amenity, including landscaping and new doors'. Namely, to amend Condition 14 of the Consented Scheme, which relates to the protection of existing London Underground infrastructure during construction.