Planning application
3 Blenheim Road London NW8 0LU
Works: Extension 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
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.
As published by the council, reference 26/05589/LBC
Application record
- Reference
- 26/05589/LBC
- Category
- Heritage and listed buildings
- Status
- Pending
- Received
- 17 Aug 2026
- Validated
- 17 Aug 2026
- Postcode
- NW8 0LU
Timeline
Dates from the published record
-
17 Aug 2026
Received by Westminster
-
22 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 12 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 heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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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
92% historically approved · decision due ~19 Oct
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.
Awaiting decision Amendments Extension Loft or dormerSmall 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
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