Planning application
26/01831/FULL
28 Blenheim Road London NW8 0LX
Proposal
Demolition of existing rear conservatory and erection of a single storey rear extension, installation of air-conditioning unit behind front parapet, installation of lightwell balustrade, alterations to windows and doors including new balcony to rear with associated access stair, installation of rooflights. Internal alterations including the removal and addition of partitions. (Linked with 26/01832/LBC)
As published by the council, reference 26/01831/FULL
Timeline
Dates from the published record
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20 Mar 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 full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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26/01832/LBC Awaiting decision
28 Blenheim Road London NW8 0LX
Demolition of existing rear conservatory and erection of a single storey rear extension, installation of air-conditioning unit behind front parapet, installation of lightwell balustrade, alterations to windows and doors including new balcony to rear with associated access stair, installation of rooflights. Internal alterations including the removal and addition of partitions.
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26/02271/LBC Awaiting decision
28 Blenheim Road London NW8 0LX
Internal alterations to allow for a larger utility, nannys bedroom, and shower room at lower ground floor level, and relocation of the kitchen to the raised ground floor. (Linked to 26/01830/FULL)
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25/07275/ADFULL Granted
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)
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26/01946/ADFULL Awaiting decision
9 Blenheim Road London NW8 0LU
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).
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26/01182/TCA Awaiting decision
4 Blenheim Road London NW8 0LU
Works: 2 x poplars (rear): crown reduce to previous (most recent) pollard points (at about height of approx. 8m).
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26/03113/ADFULL Awaiting decision
3 Blenheim Road London NW8 0LU
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)
Other full applications applications
In Westminster
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26/04824/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Detailed design and specification of new blinds to NZH based on mock-up trials on-site. pursuant to condition 32 (i) of planning permission dated 8th April 2024 (23/00571/FULL).
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26/04829/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Details of external and internal signage strategy pursuant to Condition 33(E) of planning permission dated 8th April 2024 (RN: 23/00571/FULL)
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26/04841/ADFULL Granted
29 Henstridge Place London NW8 6QD
Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.